Tag:

Alpine (>3500 m)

Orchideaceae

Goodyera fusca

by GP Jürgens

Hook.f.

Sikkim2003 457 K631.2
Sikkim Chopta Valley 3900m August

Description

Goodyera fusca is a terrestrial orchid of the higher Himalaya, ranging through Nepal, China, Bhutan, India and Myanmar (NP, CN, BT, IN, MM), with about 101 recorded occurrences. It grows in cool, shaded humus among mossy rocks, in subalpine Rhododendron and conifer thickets and at the upper forest margin, generally in the upper temperate to subalpine zone. The plant illustrated was found in the Chopta Valley of Sikkim at 3900 m in August, an elevation and late-summer flowering period typical of the species, where it occupies damp, sheltered pockets of leaf litter and bryophyte cover beneath open scrub near the treeline.

It is a small, erect herb arising from a creeping, fleshy, few-noded rhizome rooting at the nodes. The leaves are few and clustered toward the stem base, ovate to elliptic, somewhat fleshy, and in many populations marked with the reticulate veining characteristic of the 'jewel orchids'. The inflorescence is an erect, glandular-pubescent spike bearing a secund to spiralled series of small, dull brownish to greenish flowers, each subtended by a lanceolate bract. The dorsal sepal and petals are connivent to form a hood over the column, the lateral sepals spreading, and the saccate, concave lip lacks a free spur. The fruit is a small, erect, ribbed capsule releasing dust-fine seeds.

Goodyera (subtribe Goodyerinae, tribe Cranichideae of the Orchidaceae) is a chiefly Asian genus of forest-floor orchids whose germination and establishment depend on association with mycorrhizal fungi. The small, drab, nectar-bearing flowers are pollinated by small bees and other insects, and the minute seeds are wind-dispersed. As an obligately mycotrophic forest understorey orchid, G. fusca is vulnerable to disturbance of its humus-rich habitat, though across its wide Himalayan-Chinese range it is not currently regarded as threatened.

Author: Hook.f. · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Genera Orchidacearum (Goodyerinae)

Orchideaceae

Gymnadenia orchidis

by GP Jürgens

Lindl.

BhutanPG2011 801 01 01
Bhutan Chele-La, 3800m July
also included: Anaphalis busua (D.Don) DC. and Anemone demissa Hook.f. & Thomson
Nepal 99 371 ergebnis
West-Nepal Linji-Khola 3400m, June
Nepal 99 474 ergebnis
West-Nepal Churta-Khola 3200m, June

Description

Gymnadenia orchidis is a terrestrial orchid of the Himalaya and adjacent China, distributed through China, Nepal, India, Bhutan, Myanmar and Pakistan, with GBIF documenting some 795 occurrences. It is a plant of open alpine and subalpine meadows, grassy slopes, forest clearings and damp turf, growing in full sun to light shade on humus-rich soils. The species occupies the upper montane to alpine zone; the photographed material from the Chele-La pass in Bhutan at about 3800 m in July, sharing its habitat with Anaphalis busua and Anemone demissa, and from the Linji-Khola and Churta-Khola valleys of West Nepal at 3200-3400 m in June, illustrates its summer flowering across this high-elevation belt.

The plant arises from palmately lobed, fleshy root-tubers and bears an erect, leafy stem. The leaves are several, oblong to lanceolate, sheathing at the base and reduced upward to bracts. The inflorescence is a dense, cylindrical terminal spike of many small flowers, ranging in colour from purple and pink-magenta to occasionally white. Each flower has spreading lateral sepals, a hooded arrangement of the dorsal sepal and petals, and a trilobed labellum bearing a slender, decurved spur about equalling or shorter than the ovary, containing nectar. The pollinaria have naked, exposed viscidia characteristic of the genus. The fruit is a small, erect capsule.

The species belongs to Gymnadenia, a genus of nectar-spurred terrestrial orchids closely allied to Dactylorhiza and Platanthera; it has at times been segregated into Habenaria or treated under broader generic concepts, reflecting ongoing debate over the limits of the orchidine genera. Pollinated by long-tongued insects attracted to its spur nectar, it remains widespread and locally common in Himalayan alpine grasslands, although meadow degradation and grazing may affect individual populations.

Author: Lindl. · Sources: POWO (Kew), GBIF, Flora of China, Flora of Bhutan, The Orchids of Sikkim and Bhutan (Pearce & Cribb)

Caryophyllaceae

Gypsophila cerastoides

by GP Jürgens

D.Don

BhutanPG2011 233
Bhutan Tsochenchen, 3650m June
Bhutan2014 512
Bhutan Tsochenchen, 3600m June

Description

Gypsophila cerastoides is a mat-forming Himalayan pink ranging across India, Nepal and Bhutan, with the remaining GBIF country codes (USA, Austria) representing cultivated and herbarium records; the dataset holds about 65 occurrences. It is an alpine and upper subalpine plant of open stony slopes, gravelly flats, short turf and rock crevices, typically between about 3000 and 4500 m. The cushions photographed at Tsochenchen in Bhutan at roughly 3600 to 3650 m in June occupy exactly this kind of well-drained, sunlit high-mountain ground where the species flowers early in the season.

It forms low, spreading mats or loose cushions from a branched woody rootstock. The numerous small leaves are oblong to spathulate, sessile, somewhat hairy and crowded, recalling those of a Cerastium, hence the epithet. The flowers are borne singly or in few-flowered cymes on short stalks; each has five white to pale lilac petals conspicuously veined with violet or purple lines and often notched at the apex, set against a campanulate, five-toothed calyx. There are ten stamens and two styles, and the fruit is a small capsule opening by teeth to release minute seeds.

Unusual among Gypsophila for its broad, prettily veined petals and prostrate alpine habit, G. cerastoides is widely grown as a rock-garden and trough plant in temperate horticulture, which accounts for its appearance in European and North American records. Its cushion growth form is a typical adaptation to high-altitude wind, frost and drought. The species is locally common over a wide Himalayan arc and is not regarded as threatened, although alpine grazing and warming-driven vegetation shifts could affect particular populations at the margins of its range.

Author: D.Don · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Annotated Checklist of the Flowering Plants of Nepal, Barkoudah Revision of the Genus Gypsophila

Boraginaceae

Hackelia bhutanica

by G & P Jürgens

R.R.Mill

Bhutan2014 1055
Bhutan Takthsang 2900m, May
BhutanPG2011 766
Bhutan Chele-La, 3800m July

Description

Hackelia bhutanica is a forget-me-not relative of the eastern Himalaya, described from Bhutan and also recorded from India and Nepal, with a comparatively small number of occurrences (31 georeferenced records) consistent with a localised eastern Himalayan range. It grows on shaded banks, forest margins, open slopes and among rocks in the temperate to subalpine zones. The illustrated plants from Bhutan — at Takthsang around 2900 m in May and at Chele-La near 3800 m in July — span a broad altitudinal range and show the species flowering from late spring at lower elevations into mid-summer at higher ones, tracking the seasonal advance of conditions up the mountain.

The plant is an erect biennial or perennial herb, more or less roughly hairy throughout, with a leafy stem arising from a basal cluster of leaves. The leaves are alternate, narrowly lanceolate to oblong, entire and hispid. The flowers are borne in elongating, scorpioid (coiled) cymes typical of the Boraginaceae; each has a five-lobed calyx and a small, salver-shaped, blue corolla with a short tube and five spreading lobes closed at the throat by raised scales (fornices). The fruit characteristic of Hackelia consists of four nutlets whose margins bear glochidiate (barbed, hooked) prickles, an adaptation for dispersal by attachment to passing animals.

Hackelia is segregated from the closely allied Lappula and the broader stickseed group within Boraginaceae, distinguished largely by nutlet ornamentation; the species was described by R. R. Mill, a specialist in the Bhutanese and Himalayan flora. As a restricted eastern Himalayan endemic known from relatively few localities, H. bhutanica warrants attention from a conservation standpoint, its persistence depending on the maintenance of the temperate forest and open subalpine habitats it occupies.

Author: R.R.Mill · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China (Boraginaceae), Mill: revisionary studies of Himalayan Boraginaceae

Boraginaceae

Hackelia obtusifolia

by GP Jürgens

R.R.Mill

Bh09 180 P312
Bhutan Phajoding, 3600m June

Description

Hackelia obtusifolia is a Himalayan stickseed of restricted distribution, recorded from northern India, Bhutan and Nepal. GBIF documents only 14 occurrences across these three countries, indicating a localised and seldom-gathered species of the inner ranges. It grows on subalpine and alpine slopes, in open forest clearings, on rocky banks and among shrubberies on moist, humus-rich soils, broadly between about 3000 and 4000 m. The plant illustrated here was found in Bhutan at Phajoding at 3600 m in June, a high meadow and rhododendron-shrubland setting characteristic of its early-summer flowering in the eastern Himalaya.

The plant is an erect perennial herb with one or more branching, hispid stems arising from a woody rootstock. The leaves are alternate, the basal ones petiolate and the cauline ones sessile, oblong to obovate with an obtuse apex—the feature underlying the epithet—and clothed in stiff, appressed hairs. The inflorescence consists of lax, scorpioid cymes that elongate in fruit; the small flowers have a five-lobed calyx and a blue, rotate to shortly funnelform corolla with five conspicuous papillate scales (fornices) closing the throat. The fruit separates into four nutlets, each armed around the margin with glochidiate (barbed) prickles that effect epizoochorous dispersal.

Hackelia is distinguished within the tribe Cynoglosseae by its bordering of marginal glochids on the nutlets, contrasting with the wholly bristly nutlets of Cynoglossum. The barbed fruits cling readily to fur and clothing, an effective dispersal strategy in alpine grazing habitats. As a narrow Himalayan endemic known from very few collections, H. obtusifolia is poorly understood ecologically; its limited records suggest it warrants further survey, though its remote montane habitat affords some natural protection.

Author: R.R.Mill · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, An Annotated Checklist of the Flowering Plants of Nepal, A Revision of the Asiatic Species of Hackelia (Boraginaceae)

Boraginaceae

Hackelia uncinata

by G & P Jürgens

(Royle ex Benth.) C.E.C.Fisch.

Nepal 99 112 ergebnis
West-Nepal South of Rara-Lake 3600m, June
Garh 07 336 ergebnis
India Garhwal Mahji 2650m, June

Description

Hackelia uncinata (Royle ex Benth.) C.E.C.Fisch. is a perennial herb of the Himalaya and Central Asian mountains, with GBIF recording some 417 occurrences across China, India, Nepal, Pakistan, Bhutan, Myanmar, Mongolia and Russia. It grows in forest clearings, on shaded banks, among subalpine scrub and in moist meadow on the cooler slopes of the temperate to subalpine zone, flowering in early summer. The cited collections, from south of Rara Lake in west Nepal at 3600 m in June and from Mahji in Garhwal (Indian Himalaya) at 2650 m in June, illustrate its preference for partly shaded, humus-rich montane sites where it forms loose stands.

The plant produces erect to ascending, pubescent stems from a perennial rootstock, bearing alternate, ovate-lanceolate to elliptic leaves that are softly hairy, the lower ones petiolate and the upper sessile. The small flowers are arranged in lax, branched, scorpioid cymes; the corolla is rotate to shortly funnelform, pale blue to violet, with five lobes and prominent throat appendages (fornices). The diagnostic feature, reflected in the epithet uncinata, lies in the four nutlets, whose margins bear a row of glochidiate (hooked, barbed) prickles that catch on fur and clothing, effecting epizoochorous dispersal.

Hackelia, segregated from Lappula and the broader stickseed assemblage, is distinguished by nutlet ornamentation and is centred on the temperate mountains of Asia and the Americas. The hooked nutlets are an effective adaptation for animal-mediated dispersal across open montane terrain. The species is widespread and not of conservation concern, occurring frequently in both natural and lightly disturbed habitats throughout its broad Himalayan and Central Asian range.

Author: (Royle ex Benth.) C.E.C.Fisch. · Sources: POWO (Kew), GBIF, Flora of Nepal, Flora of China, Boraginaceae of the Western Himalaya, Brand monograph on Hackelia and Lappula

Gentianaceae

Halenia elliptica

by GP Jürgens

D.Don

Bhutan2012 18
Bhutan Shele-La, 3600m September
Bhutan2012 52
Bhutan Shele-La, 3600m September

Description

Halenia elliptica is a widespread Asian gentian-relative ranging across the Himalaya and the mountains of central and eastern Asia, recorded from China, India, Nepal, Bhutan, Myanmar, Kazakhstan, Mongolia, Russia and Taiwan (CN, IN, NP, BT, MM, KZ, MN, RU, TW, with further records), and one of the most abundantly collected species treated here, with about 4437 occurrences. It grows in moist alpine and subalpine meadows, on grassy slopes, forest clearings, streamsides and open disturbed ground over a wide altitudinal span. The plant illustrated was found at Shele-La in Bhutan at 3600 m in September, an elevation and late-season flowering typical of its appearance in the autumn alpine turf and roadside banks of the high passes.

It is an erect, glabrous annual or biennial with a four-angled, often branched stem. The leaves are opposite, sessile or shortly petiolate, elliptic to ovate-lanceolate with three to five prominent longitudinal veins. The flowers are borne in terminal and axillary cymes; the most distinctive feature is the corolla, which is four-lobed and blue to purplish, each lobe bearing at its base a slender, backward-projecting nectar spur, so that the open flower carries four divergent spurs, the character that defines the genus. The four stamens alternate with the lobes, and the superior, bicarpellate ovary ripens into a many-seeded capsule.

Halenia (subfamily Gentianoideae, tribe Gentianeae of the Gentianaceae) is unusual within its family for the conspicuously spurred corolla, an adaptation offering nectar to long-tongued pollinating insects and a notable instance of nectar-spur evolution within the otherwise spurless gentians. The species is highly variable across its enormous range. As a common, weedy, broadly distributed colonist of disturbed montane habitats, H. elliptica is of no conservation concern, and it is also gathered for use in Tibetan and Chinese traditional medicine.

Author: D.Don · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Gentianaceae monograph (Halenia revision)

Ranunculaceae

Halerpestes tricuspis

by G & P Jürgens

(Maxim.) Hand.-Mazz.

Sikkim2004 282 P494 ergebnis
Sikkim Dzongri 4000m, May

Description

Halerpestes tricuspis is a small, stoloniferous perennial of the Ranunculaceae, distributed across the high mountains of Central Asia and the Himalaya. GBIF records (377 occurrences) document its presence in China, Nepal, India, Bhutan, Mongolia and Pakistan, where it occupies the alpine and subalpine zone. It is a characteristic plant of moist, often saline or marshy ground, the margins of glacial lakes, seepage flushes and streamsides, typically between 3,000 and 5,000 m. The photographed material from Dzongri in Sikkim at around 4,000 m in May exemplifies this preference for wet alpine meadows where snowmelt sustains permanently damp substrates.

The plant forms low mats by means of slender, rooting stolons. The leaves are basal, long-petiolate, with a small, fleshy, broadly cuneate to obovate blade that is characteristically three-toothed or shallowly three-lobed at the apex, the feature from which the epithet tricuspis derives. Flowering scapes are leafless and rise just above the foliage, each bearing one to few small, bright yellow flowers. The flowers have five sepals and five glossy petals each with a basal nectary scale; the numerous stamens surround a domed receptacle that develops into a globose to ovoid head of small, compressed, finely ridged achenes.

Formerly placed in Ranunculus, the genus Halerpestes is distinguished by its stoloniferous habit, the toothed leaf apices and the longitudinally ribbed achenes adapted to wetland dispersal. The species is an indicator of intact alpine wetland and flush communities, habitats sensitive to grazing pressure, trampling and hydrological change driven by glacial retreat. Though not currently of conservation concern owing to its wide range, its dependence on specialised wet microhabitats makes local populations vulnerable.

Author: (Maxim.) Hand.-Mazz. · Sources: POWO (Kew), Flora of China Vol. 6, Flora of Bhutan Vol. 1, GBIF, Tamura: Die natürlichen Pflanzenfamilien – Ranunculaceae (1995)

Fabaceae

Hedysarum kumaonense

by G & P Jürgens

Benth. ex Baker

Nepal 99 720 ergebnis ergebnis
West-Nepal Bauli-Khola 3550m, July

Description

Hedysarum kumaonense is an alpine legume of the western and central Himalaya, recorded from Nepal, China and India across some 63 GBIF occurrences. The photographed plant was found at Bauli-Khola in West Nepal at about 3550 m in July. It inhabits open alpine and subalpine slopes, stony meadows, gravelly riverbanks and grazed turf, typically between 3000 and 4500 m, growing on well-drained, often calcareous substrates in the high-elevation grasslands that flower briefly during the short summer.

The plant is a perennial herb with a stout woody rootstock and ascending to erect stems. The leaves are imparipinnate, bearing several pairs of elliptic to oblong leaflets, with membranous stipules at the base of the petiole. The flowers are papilionaceous, pink to purple or reddish, arranged in dense axillary racemes; each has the standard, wing and keel petals characteristic of the Fabaceae. The diagnostic fruit is a flattened, transversely jointed loment that breaks at maturity into one-seeded, reticulate articles, a feature that distinguishes Hedysarum (sweetvetches) from related genera.

Like most legumes the species fixes atmospheric nitrogen through root nodules in symbiosis with rhizobia, enriching the impoverished alpine soils it colonises. The lomentaceous fruit segments are dispersed individually, aided by their textured surface. As a member of the Himalayan alpine flora with a regionally restricted range, H. kumaonense is not formally assessed as threatened but is subject to heavy summer grazing across its montane pastures.

Author: Benth. ex Baker · Sources: POWO (Kew), GBIF, Flora of China, Flora of Nepal, Flora of Pakistan, Fedtschenko – Monograph of the Genus Hedysarum

Fabaceae

Hedysarum tibeticum

by GP Jürgens

(Benth.) B.H.Choi & H.Ohashi

Sikkim2011 44
Bhutan Chele-La 4000m, May
Sikkim2011 78
Sikkim Vista-valley 3700m, June
Sikkim2011 44 1
Sikkim Vista-valley 3700m, June

Description

Hedysarum tibeticum is a high-alpine legume of the Himalaya and Tibetan plateau, distributed across China, India, Nepal and Bhutan, with around 295 GBIF records; it has historically also been treated under the name Stracheya tibetica, reflecting earlier generic placement. It grows on open stony alpine slopes, gravelly pastures, moraine flats and dry grassy banks near and above treeline, generally between about 3500 and 4500 m. The collections cited from Chele-La in Bhutan at 4000 m in May and from the Vista-valley in Sikkim at 3700 m in June show its early-summer flowering across the high eastern Himalaya.

It is a low, cushion- or mat-forming perennial herb arising from a stout woody rootstock and deep taproot. The leaves are imparipinnate with several pairs of small, oblong to elliptic leaflets that are often appressed-hairy. The flowers are borne in short, dense racemes; each is the typical papilionaceous pea-flower, with a standard, two wings and a keel, coloured pink to purplish-red. The diagnostic fruit is a flattened, transversely jointed lomentum that breaks at maturity into one-seeded segments, the articles often margined or prickly, aiding epizoochorous dispersal.

The taxon has been the subject of nomenclatural revision, the monotypic genus Stracheya having been merged into Hedysarum by Choi and Ohashi on the basis of morphological and molecular evidence, so that POWO now treats Hedysarum tibeticum as accepted. The low cushion habit and deep root are adaptations to wind, cold and the thin soils of the high plateau, while the jointed lomentum is an efficient dispersal device. Widespread across the Tibetan borderlands, the species is not considered threatened and is a characteristic component of high-alpine legume communities.

Author: (Benth.) B.H.Choi & H.Ohashi · Sources: POWO (Kew), GBIF, Flora of China (Fabaceae), Flora of Bhutan, Annotated Checklist of the Flowering Plants of Nepal, Choi & Ohashi systematic revision of Hedysarum