Tag:

Autumn

Rosaceae

Agrimonia pilosa

by GP Jürgens

Ledeb.

Bhutan2015 301
Bhutan Trongsa 2000m,October

Description

Agrimonia pilosa is a broadly distributed temperate herb ranging across much of Eurasia, from central and eastern Europe through Russia, Kazakhstan and Mongolia to China, Korea, Japan and Taiwan, and southward into the Himalaya in Nepal, India and Bhutan as well as Vietnam and Indonesia. With over 25,600 GBIF records it is among the most frequently collected agrimonies. It grows in grassy and disturbed places, forest margins, meadows, roadsides and scrub over a wide elevational range. The Bhutanese material photographed near Trongsa at 2000 m in October represents the species in mid-montane meadow habitat of the eastern Himalaya, flowering and fruiting late in the season.

The plant is an erect perennial herb arising from a short rhizome, with stems clothed in spreading hairs. The leaves are imparipinnate, comprising several principal toothed leaflets interspersed with much smaller intercalary leaflets, and bear conspicuous toothed stipules at the base. The small yellow flowers are borne in a long, slender, terminal raceme; each has five sepals, five obovate petals and numerous stamens. The diagnostic fruit is a top-shaped, grooved hypanthium crowned by a ring of hooked bristles that close over the apex and act as an epizoochorous dispersal mechanism, catching on fur and clothing.

Agrimonia pilosa is distinguished from the related A. eupatoria by its more obconical, deeply furrowed fruit whose outermost hooked bristles are spreading to deflexed rather than erect. The species has a long history of use in traditional East Asian and European herbal medicine, where it is valued for astringent and haemostatic properties. Ecologically it is a competitive component of secondary grassland and forest-edge communities, and its hooked fruits ensure effective animal dispersal; it is common throughout its vast range and of no conservation concern.

Author: Ledeb. · Sources: POWO (Kew), GBIF, Flora of China, Flora of Bhutan, Annotated Checklist of the Flowering Plants of Nepal, Skalicky's revision of Agrimonia (monograph)

Asteraceae

Ajania myriantha

by GP Jürgens

(Franch.) Ling ex C.Shih

Bhutan2015 679
Bhutan Chele-La 4000m, October
Bhutan2012 100
Bhutan Shele-La, 3600m September

Description

Ajania myriantha is a subshrubby composite of the Sino-Himalaya, native to China, Nepal, Bhutan and India and recorded by aggregated databases from a fair number of high-elevation localities. It is a plant of the upper subalpine and alpine zone, growing on dry, open stony slopes, rocky banks, cliff ledges and exposed pastures, generally between about 3000 and 4200 m. The individuals shown were photographed at Chele-La in Bhutan at 4000 m in October and at Shele-La at 3600 m in September, their autumn flowering being typical of this late-blooming high-mountain genus.

The plant forms a low, much-branched, somewhat woody-based perennial or dwarf subshrub, often grey-green with appressed silvery indumentum that reduces water loss in the exposed alpine environment. The leaves are alternate, ovate to obovate in outline and pinnately to bipinnately divided into small, narrow lobes, greyish-tomentose especially beneath. The capitula are small, numerous and discoid, lacking ray florets, and are aggregated into dense, flat-topped corymbose clusters, as the epithet myriantha (many-flowered) implies. Each head bears an involucre of imbricate, scarious-margined phyllaries enclosing yellow tubular florets; the achenes are small and ribbed and typically lack a conspicuous pappus.

Ajania is a Central and East Asian genus segregated from Chrysanthemum and its allies within the Chrysantheminae of tribe Anthemideae, distinguished by its discoid heads of tubular florets only. The generic limits of Ajania, Chrysanthemum and related taxa remain debated following molecular study, and some authors have proposed transfers. Locally common on dry alpine slopes, the species is not of conservation concern, though it is of interest as part of the aromatic Sino-Himalayan Anthemideae flora.

Author: (Franch.) Ling ex C.Shih · Sources: POWO (Kew), GBIF, Flora of China, Flora of Bhutan, Anthemideae systematic studies, Compositae of the Himalaya

Asteraceae

Ajania nubigena

by GP Jürgens

(Wall. ex DC.) Muldashev

Bhutan2012 303
Bhutan Shale-La, 4300m September
Garw 2005 301 ergebnis scaled
Garw 2005 302 ergebnis scaled
India Garhwal Patanathi 3600m, September

Description

Ajania nubigena is a high-altitude aromatic composite of the Himalaya and Tibetan borderlands, recorded from Nepal, China (Tibet), India and Bhutan, with 266 georeferenced occurrences spanning the alpine zone of the main range. It grows on dry, stony alpine slopes, gravelly screes, rock crevices and exposed ridges, typically in the upper subalpine to alpine belt. It was photographed on the Shale-La in Bhutan at 4300 m and in Garhwal, India, at Patanathi at 3600 m, both in September, when its yellow heads flower amid the dry autumn alpine turf of these high passes.

It is a low, tufted, somewhat woody-based perennial subshrub or herb forming compact clumps, the stems and foliage clothed in dense grey to silvery appressed hairs that give a felted appearance and impart drought and frost tolerance. The leaves are small, alternate and pinnately or bipinnately dissected into narrow lobes, grey-tomentose especially beneath. The flower heads are small, discoid (lacking ray florets) and yellow, aggregated into dense terminal corymbs; each head has an involucre of imbricate, scarious-margined phyllaries and numerous tubular hermaphrodite and marginal female florets. The fruit is a small ribbed cypsela, usually lacking a pappus.

The genus Ajania, segregated from Chrysanthemum and Tanacetum within tribe Anthemideae, comprises mostly silvery-leaved, discoid-headed species of arid Central Asian and Himalayan uplands; the combination (Wall. ex DC.) Muldashev reflects this transfer. Its dense indumentum and dissected leaves are adaptations to the cold, dry, high-radiation alpine environment. Ecologically it is a xerophytic specialist of open stony ground, widespread within its altitudinal band and of no conservation concern.

Author: (Wall. ex DC.) Muldashev · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Anthemideae systematics (Bremer & Humphries monograph)

Alliaceae

Allium wallichii

by GP Jürgens

Kunth

Bhutan2012 30
Bhutan Chele-La 3400m, September

Description

Allium wallichii is a Himalayan and Sino-Himalayan onion widely distributed through SW China, Nepal, NE India, Bhutan, Myanmar and Pakistan, GBIF recording around 1,300 occurrences (with cultivated records reaching Europe). It is a plant of the subalpine and alpine zone, growing in open meadows, grassy slopes, forest clearings and damp pastures, generally between about 2,300 and 4,800 m. The photographed plant from Chele-La in western Bhutan at 3,400 m (September) is characteristic, flowering in the late-monsoon period when the high meadows are at their richest.

It is a perennial herb arising from a slender, oblique rhizome bearing a poorly developed, narrowly conic bulb. The leaves are basal, several, narrowly linear to lorate and flat or shallowly keeled, sheathing the lower part of the triangular or angled scape. The inflorescence is a terminal, many-flowered umbel that is hemispherical to globose and lacks bulbils; the flowers are stellate, with six spreading purple to reddish-purple (rarely whitish) tepals, exserted stamens and a superior ovary. The fruit is a small loculicidal capsule.

The family is given verbatim as Alliaceae, the segregate now generally subsumed within Amaryllidaceae subfamily Allioideae. Allium wallichii is gathered as a wild vegetable and flavouring (jimbu and related condiments) across the Himalaya and is used medicinally, which together with grazing places local pressure on accessible populations. The species is morphologically variable across its wide range, and its rhizomatous, non-bulbous habit and flat leaves distinguish it within the alpine Himalayan alliums; it is not currently regarded as globally threatened.

Author: Kunth · Sources: POWO (Kew), Flora of Bhutan Vol. 2, GBIF, Flora of China Vol. 24, Stearn: The Genus Allium in the Himalaya

Betulaceae

Alnus nepalensis

by GP Jürgens

D.Don

Bhutan2012 1150
Bhutan Tashiyangtse 1750m, October
Nepal 1994 159 ergebnis
Ost-Nepal Mewa-Khola
1800m, April

Description

Alnus nepalensis D.Don, the Nepalese alder, is a deciduous tree of the Betulaceae distributed throughout the Himalaya and adjacent ranges, from Nepal and India through Bhutan to southwestern China, Myanmar and Vietnam (GBIF: c. 1,931 occurrences). It is a fast-growing pioneer of moist temperate and subtropical zones, colonising landslides, river terraces, abandoned fields and forest gaps, typically between about 900 and 2,700 m. The photographed trees from Tashiyangtse in eastern Bhutan (c. 1,750 m) and the Mewa-Khola in eastern Nepal (c. 1,800 m) exemplify its dominance on moist, disturbed mid-montane slopes.

The tree reaches 10–25 m, with smooth grey bark becoming fissured with age. The leaves are alternate, broadly elliptic to ovate, acuminate, with finely serrate to nearly entire margins and prominent pinnate venation. Unusually for the genus, A. nepalensis flowers in autumn: the slender pendulous male catkins and short erect female inflorescences appear together, and the female structures mature into small, woody, cone-like infructescences (strobiles) that persist on the tree and release tiny winged nutlets (samaras) for wind dispersal.

Alnus nepalensis is ecologically and economically significant as a nitrogen-fixing species, harbouring symbiotic actinomycetes of the genus Frankia in root nodules; this enables it to enrich degraded soils, making it valuable in agroforestry, soil reclamation, watershed restoration and as a shade tree in cardamom cultivation. The wood is used for timber, fuel and matchwood. The species is abundant and of least conservation concern.

Author: D.Don · Sources: POWO (Kew), Flora of China Vol. 4, Flora of Bhutan Vol. 1, Flora of Nepal, GBIF, Chen & Li: Betulaceae of China

Vitaceae

Ampelocissus rugosa 

by G & P Jürgens

Planch.

Garw 2005 268 ergebnis
India Garhwal Kunol 2400m, September

Description

Ampelocissus rugosa is a tendril-climbing vine of the Himalaya and adjacent south-east Asia, recorded from Nepal, India, Bangladesh, Bhutan, China, Myanmar and Vietnam. Its roughly 95 georeferenced collections, the fewest in this group, indicate a relatively restricted and under-collected distribution along the subtropical-to-warm-temperate forest belt of the Himalayan foothills. It grows in forest margins, thickets, ravines and along streams, scrambling over shrubs and trees. The photographed plant from Garhwal at Kunol at 2400 m in September represents the upper part of its altitudinal range and its late-monsoon fruiting period, when the vine bears its grape-like infructescences.

It is a robust herbaceous to woody climber with leaf-opposed tendrils characteristic of the grape family. The simple leaves are broadly ovate to cordate in outline, sometimes shallowly lobed, with a toothed margin and a rugose (wrinkled) upper surface that gives the species its epithet; the lower surface is often tomentose. The inflorescence is a leaf-opposed, compound cyme or panicle, typically with a basal tendril, bearing many small, greenish flowers with a four- to five-merous calyx and corolla and a fleshy disc around the ovary. The fruit is a small, globose, fleshy berry, ripening dark purple to black and containing one or few hard seeds, the cluster superficially resembling a wild grape.

Ampelocissus is a pantropical genus of the Vitaceae closely allied to Vitis, distinguished by its tendril-bearing inflorescences and frequently tuberous rootstock. Several Asian species are gathered locally for their edible, acidic fruits and have potential as wild relatives of the cultivated grape. A. rugosa is a sparsely documented Himalayan vine; while not formally assessed, its limited collection record warrants attention to forest-margin habitats under pressure from clearance.

Author: Planch. · Sources: POWO (Kew), GBIF, Flora of China Vol. 12, Flora of Bhutan Vol. 2, Flora of Nepal, Latiff's Revision of Asian Ampelocissus

Asteraceae

Anaphalis busua

by GP Jürgens

DC.

Bhutan2012 160
Bhutan Haar-Valley, 3200m September
Bhutan2012 160
Bhutan Haar-Valley, 3200m September
BhutanPG2011 833 01 01 1
Bhutan Chele-La, 3400m July

Description

Anaphalis busua is a Himalayan everlasting widespread from Pakistan and India through Nepal, Bhutan and Myanmar into south-western China, with additional records from Sri Lanka; the 619 occurrences confirm a broad montane range, while points labelled Belgium represent cultivated or erroneous data. It occupies open grassy slopes, forest clearings, banks and disturbed ground from roughly 1500 to 3600 m. The documented Bhutanese material from the Haa Valley at about 3200 m in September and from the Chele-La at 3400 m in July illustrates its long flowering season across the temperate and lower subalpine zones of the eastern Himalaya.

The species is a perennial herb with a woody rootstock producing erect, white-woolly stems. The leaves are sessile, linear to oblong-lanceolate, somewhat decurrent, green and thinly arachnoid above and densely white-tomentose beneath, with revolute margins. The capitula are small and numerous, aggregated into dense terminal corymbs; each head is heterogamous and functionally dioecious, with the involucre of papery, pearly-white, radiating phyllaries that give the genus its everlasting quality. The florets are tubular and whitish, the outer female and filiform, the inner mostly functionally male. The cypselae are minute and oblong, crowned by a pappus of slender, barbellate, basally free bristles.

Anaphalis is a large genus of the Gnaphalieae especially diverse in the Sino-Himalayan region, distinguished from Helichrysum and Gnaphalium by its scarious involucres and predominantly dioecious heads. A. busua belongs to the broad-leaved Himalayan group and is taxonomically variable, with several related forms intergrading. The dry chaffy phyllaries persist long after flowering, favouring wind dispersal of the small achenes. The species is common and weedy in disturbed montane habitats and is of no conservation concern.

Author: DC. · Sources: POWO (Kew), GBIF, Flora of China Vol. 20-21, Flora of Bhutan, Flora of Nepal, Hilliard & Burtt Gnaphalieae studies

Asteraceae

Anaphalis cavei

by GP Jürgens

Chatterjee

Nepal 95 418 W728 ergebnis
Nepal Jaisuli Kund 4200m, October

Description

Anaphalis cavei is a Himalayan high-alpine species recorded from Nepal, northern India, Bhutan and southwestern China, with around 91 occurrences concentrated along the main Himalayan axis. It is a plant of the upper alpine zone, the accompanying image documenting it at Jaisuli Kund in Nepal at about 4200 m in October, as the brief autumn growing season closes. It inhabits open stony slopes, alpine meadow turf, moraine and rocky ground near and above the treeline, growing in well-drained, often gravelly substrates exposed to intense insolation and cold, where its dense indumentum mitigates desiccation and ultraviolet stress.

It is a small, perennial, white-woolly herb forming low tufts or mats from a branched, somewhat woody caudex. The stems and leaves are densely covered in appressed lanate-tomentose hairs giving a silvery-grey aspect; the leaves are narrowly oblanceolate to spathulate, often with margins revolute and bases decurrent or semi-amplexicaul. The capitula are aggregated into a compact terminal corymb; each head is surrounded by several rows of dry, papery, pearly-white involucral bracts characteristic of the genus. The plants are functionally dioecious, with female and male florets borne predominantly on separate heads, and the cypselae are small, glabrous and crowned by a deciduous capillary pappus.

The species, described by Chatterjee, belongs to tribe Gnaphalieae, the genus Anaphalis being a taxonomically intricate group of "everlasting" daisies whose papery bracts persist long after flowering. Its restricted high-elevation range, dense wool and cushion-like habit are adaptations to the harsh alpine environment, and seed dispersal is anemochorous via the pappus. Owing to its narrow, remote montane distribution it has not been formally assessed, but it appears locally frequent within suitable alpine habitat.

Author: Chatterjee · Sources: POWO (Kew), GBIF, Flora of China, Annotated Checklist of the Flowering Plants of Nepal, Gnaphalieae monograph (Asteraceae)

Asteraceae

Anaphalis contorta

by GP Jürgens

Hook.f.

Bhutan2015 325
Bhutan Trongsa 2000m, October
Bhutan2012 294
Bhutan Shele-La, 3900m September
Bhutan2012 892
Bhutan Tumching-La, 3700m October
Bhutan2012 893
Bhutan Tumching-La, 3700m October

Description

Anaphalis contorta is a widespread Asian everlasting distributed from Nepal, India and Bhutan through China to the Philippines, Taiwan, Pakistan, Bangladesh and Afghanistan, with GBIF recording over 1280 occurrences across this broad range. It is a plant of open, sunny, often dry and stony ground, favouring grassy slopes, banks, rocky pasture, trackside verges and forest margins from the temperate zone up into the subalpine. The cited Bhutanese localities span this breadth, from Trongsa at 2000 m in October to the Shele-La at 3900 m in September and the Tumching-La at 3700 m in October, demonstrating its occurrence from mid-montane forest country to high subalpine passes where it persists and flowers into the autumn.

It is a perennial herb forming tufts from a woody rootstock, the erect stems and the linear to narrowly lanceolate leaves clothed in dense white or greyish woolly tomentum, the leaf margins frequently revolute and somewhat contorted, a feature alluded to in the epithet. The capitula are small and numerous, aggregated into dense terminal corymbose clusters. Each head is surrounded by an involucre of dry, papery, persistent white phyllaries that constitute the showy part of the inflorescence, the plant being functionally dioecious with male and female heads on separate individuals. The minute tubular florets give rise to tiny cypselae bearing a pappus of slender barbellate bristles.

A member of tribe Gnaphalieae, Anaphalis comprises numerous Himalayan and East Asian species whose papery white "everlasting" bracts are an adaptation to exposed, drought-prone montane habitats and aid in attracting pollinators to the small florets. The dried inflorescences are long-lasting and locally gathered for decoration. Tolerant of poor soils and disturbance and very widely distributed, A. contorta is a secure species of no conservation concern.

Author: Hook.f. · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Annotated Checklist of the Flowering Plants of Nepal, Hilliard's revision of Anaphalis (Gnaphalieae)

Asteraceae

Anaphalis margaritacea

by GP Jürgens

(L.) Benth. & Hook.f.

Bhutan2012 98
Bhutan Shele-La, 3600m September

Description

Among the most widely distributed of all Asteraceae, Anaphalis margaritacea spans a remarkable circumboreal and montane range, documented from North America (US, CA) and eastern Asia (CN, JP, TW) across the Himalaya (NP, IN) to a broad swathe of temperate Europe (GB, SE, DE, CZ, FR, AT, NL, CH, DK, NO, FI) and Russia, with more than 62,000 GBIF occurrences attesting to its abundance and partly naturalised status in the Old World. It favours open, well-drained sunny situations: grassy slopes, forest margins, roadsides, screes and subalpine meadows. In the eastern Himalaya it ascends well into the high mountains, as seen in the photographed population on the Shele-La in Bhutan at around 3600 m in September, where it flowers late in the season on stony alpine turf.

A perennial herb arising from a creeping rhizome, it forms erect, simple stems 20–60 cm tall, densely clothed throughout in white woolly-tomentose indumentum. The leaves are alternate, sessile, linear to linear-lanceolate, often somewhat decurrent, green and thinly arachnoid above and persistently white-tomentose beneath, with revolute margins. The inflorescence is a dense terminal corymb of numerous small capitula; each head is surrounded by several series of pearly-white, papery, radiating involucral bracts that give the plant its lasting ornamental quality. The florets are functionally unisexual, the species being largely dioecious, with tubular yellowish disc florets. The fruit is a small oblong cypsela bearing a pappus of slender barbellate bristles aiding wind dispersal.

The pearly everlasting is the type species of Anaphalis, a genus of the tribe Gnaphalieae centred on Asia, and its papery bracts retain form when dried, long valuing it in floristry. Ecologically it is a colonist of disturbed and pioneer ground, behaving as a weakly invasive naturalised plant in parts of Europe. Of least conservation concern given its vast range and ecological tolerance, it nonetheless provides a useful nectar source for late-season pollinators and larval food for certain lepidoptera.

Author: (L.) Benth. & Hook.f. · Sources: POWO (Kew), GBIF, Flora of China Vol. 20-21, Flora of Bhutan, Flora of Nepal, Anaphalis monograph (Hilliard & Burtt, Gnaphalieae)