Tag:

Montane (1500-2500 m)

Campanulaceae

Asyneuma fulgens

by GP Jürgens

(Wall.) Briq.

BhutanPG2011 840
Bhutan Paro-Chu, 2400m July

Description

Asyneuma fulgens is a bellflower-family herb widely distributed across the Himalaya and adjacent Asia, well represented in GBIF with about 276 occurrences from China, India, Nepal, Bhutan, Myanmar and beyond. It is a plant of open, sunny situations, occurring on grassy and rocky slopes, banks, clearings, scrub and roadside verges in the warm-temperate to lower subalpine belt. The plant photographed along the Paro-Chu in Bhutan at about 2400 m in July was recorded in the monsoon flowering season, consistent with its preference for moist but well-drained montane slopes in the lower part of its altitudinal range.

It is an erect perennial herb, often slender and somewhat wiry, with simple or sparingly branched stems arising from a thickened rootstock and exuding latex when cut, as is typical of the family. The leaves are alternate, the lower ones petiolate and ovate to lanceolate, the upper sessile and narrower, with toothed margins. The flowers are borne in elongate, often interrupted spike-like or racemose inflorescences; each has a five-lobed calyx and a deeply five-parted, star-shaped corolla in shades of blue, violet or purple, the linear lobes spreading at anthesis. The style is exserted with a lobed stigma, and the fruit is a capsule dehiscing by lateral pores to shed many small seeds.

Asyneuma is segregated from Phyteuma and Campanula chiefly by its deeply divided, rotate corolla and the manner of capsule dehiscence. The genus is centred on Eurasia, with a notable Himalayan and Sino-Himalayan representation. As a widespread, ecologically tolerant species occupying disturbed as well as natural slopes, A. fulgens is not of conservation concern, and it provides a nectar and pollen resource for bees and other insect visitors in montane meadows.

Author: (Wall.) Briq. · Sources: POWO (Kew), GBIF, Flora of China, Flora of Bhutan, Hooker Flora of British India, Lammers World Checklist of Campanulaceae

Fabaceae

Bauhinia variegata

by GP Jürgens

L.

Bhutan2014 45
Bhutan Trashigang 1200m, May
Bhutan2014 46
Bhutan Trashigang 1200m, May
Nepal 1994 170 ergebnis
Ost-Nepal Mewa-Khola
1850m April

Description

Bauhinia variegata, the orchid tree or kachnar, is a deciduous tree native to tropical and subtropical Asia and now pantropically naturalised, reflected in GBIF's nearly 5000 occurrences spanning India, Nepal, China, Myanmar, Thailand and Pakistan as well as introduced ranges in Brazil, the United States, Mexico, South Africa, Australia and Spain. In the Himalayan foothills it occupies warm, seasonally dry broadleaf forest, riverine slopes and disturbed ground from the plains to about 1900 m. The photographed trees from Trashigang in eastern Bhutan at 1200 m in May and from the Mewa-Khola in eastern Nepal at 1850 m in April illustrate its lower-montane habitat, where it flushes conspicuous blossoms in the dry pre-monsoon months on largely leafless branches.

It is a small to medium tree with grey-brown bark and a spreading crown. The alternate leaves are broadly ovate-cordate, bilobed for up to one-third their length into two rounded lobes giving the characteristic camel-footprint outline, with palmate venation. The showy, fragrant flowers are borne in short axillary or terminal racemes; each has five obovate, clawed petals ranging from white through pink to mauve-purple, the uppermost broader and streaked with deeper veining, and typically three to five fertile stamens. The fruit is a flat, dehiscent, woody legume up to 30 cm long containing several compressed seeds.

A member of Fabaceae (Caesalpinioideae), Bauhinia is the type genus of the diagnostically bilobed-leaved tribe Cercideae. The species is extensively cultivated as an ornamental and avenue tree, while its flower buds, bark and young pods are used as vegetables and in traditional medicine. Widespread, weedy and able to fix little nitrogen yet tolerant of poor soils, it is of Least Concern and locally invasive beyond its native range.

Author: L. · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Annotated Checklist of the Flowering Plants of Nepal, Larsen & Larsen revision of Bauhinia

Begoniaceae

Begonia cathcartii

by GP Jürgens

Hook.f. & Thomson

Sikkim2004 342 G603
India West-Bengal, Utaray 2100m April
Sikkim2004 116 P199
Sikkim West-Bengal, Yoksam, 1950m April

Description

Begonia cathcartii is a perennial herb of the moist eastern Himalaya and neighbouring montane Southeast Asia, recorded from northern India (Sikkim, Darjeeling), Nepal, Bhutan, Myanmar, Thailand and Peninsular Malaysia; GBIF documents about 138 occurrences. It is a plant of shaded, humid broadleaved forest, growing on damp banks, mossy boulders and stream sides where humidity remains high, chiefly between about 1500 and 2700 m. The photographed material came from the Darjeeling hills at Utaray near 2100 m and from Yoksam in Sikkim at about 1950 m, both in April, matching the cool, dripping understorey it favours during the pre-monsoon flush.

The plant is a fleshy, somewhat succulent herb with an erect or ascending, sparingly branched stem arising from a rhizomatous or tuberous base. As in the genus the leaves are alternate, markedly asymmetric (oblique) at the base, broadly ovate, acuminate, with a toothed and often shallowly lobed margin and conspicuous stipules. The flowers are monoecious and borne in axillary cymes, white to pale pink; the staminate flowers bear several stamens while the pistillate flowers sit above a winged inferior ovary. The fruit is a three-winged capsule, with one wing usually larger, releasing very numerous minute seeds.

Begonia (Begoniaceae) is one of the largest angiosperm genera, and B. cathcartii belongs to its rich Sino-Himalayan rhizomatous assemblage, named for J. F. Cathcart. Its monoecious flowers, unequal capsule wings and asymmetric leaves are characteristic of the family. Dependent on humid forest microhabitats, it is locally frequent and not formally assessed as threatened, but sensitive to forest clearance and desiccation.

Author: Hook.f. & Thomson · Sources: POWO (Kew), GBIF, Flora of China Vol. 13, Flora of Bhutan Vol. 2, Flora of Nepal, Flora of Pakistan, Hooker Begonias of the Himalaya in Flora of British India

Begoniaceae

Begonia megaptera

by G & P Jürgens

A.DC.

Bhutan2012 480 ergebnis
Bhutan, Wangdi 1800m, September
Bhutan2012 481
Bhutan, Wangdi 1800m, September

Description

Begonia megaptera is a tuberous begonia native to the eastern Himalaya and adjacent regions, recorded from Nepal, northeast India (Sikkim, Darjeeling, Meghalaya), Bhutan, and Myanmar, with occasional records from Sri Lanka. It inhabits moist, shaded environments including rock crevices, mossy banks, stream margins, and damp earth walls in warm broadleaved and subtropical forests at elevations of 900–2,500 m. The species has been documented near Wangdi in Bhutan at 1,800 m, where it flowers during the monsoon and post-monsoon period in September.
The plant is a perennial herb arising from a globose tuber, with erect or ascending, succulent, sparsely branched stems 20–50 cm tall, tinged red and bearing scattered hairs. Leaves are alternate, broadly ovate to suborbicular, distinctly asymmetric, 8–20 cm long and nearly as wide, with a cordate base, irregularly serrate to dentate margins, and palmately veined undersurface often flushed reddish-purple. Stipules are large, ovate, and persistent. The inflorescence is a dichasial cyme bearing both male and female flowers; male flowers have two large, broadly ovate, white to pale pink tepals and numerous yellow stamens, while female flowers have five unequal tepals and a prominently three-winged inferior ovary — the epithet "megaptera" (large-winged) refers to the conspicuously enlarged wing on the fruit. The capsule is pendulous, with one wing much larger than the other two, up to 3 cm broad.
Begonia megaptera belongs to Begonia section Platycentrum and is distinguished by its notably large, unequal capsule wings and broad, nearly orbicular leaves. With only 63 occurrence records in GBIF, it remains a rather uncommon species. Begonia is one of the largest angiosperm genera, with over 2,000 species, and the eastern Himalayan region represents a secondary centre of diversity. B. megaptera contributes to the rich lithophytic and epipetric flora characteristic of humid gorge habitats in the region.

Author: A.DC. · Sources: POWO (Kew), GBIF, Flora of Bhutan Vol. 2, Doorenbos et al.: The Sections of Begonia (1998), Hughes et al.: Asian Begonia (2015)

Begoniaceae

Begonia palmata

by G & P Jürgens

D.Don

Sikkim 2006 499 ergebnis
Sikkim 2006 279 ergebnis
India West-Bengal, Chaana 1600m, May

Description

Begonia palmata D.Don is a widespread and highly variable perennial herb of the Sino-Himalaya and Southeast Asia, recorded by GBIF from across China and Taiwan, the eastern Himalaya (Nepal, India, Bhutan), Myanmar, Thailand, Laos, Vietnam, Bangladesh and Malesia. It is a characteristic plant of shaded, humid evergreen and broad-leaved forest, growing on moist rocks, mossy banks, ravine sides and beside streams from the foothills to roughly 2,500 m. The May collection from Chaana in Darjeeling district of West Bengal at 1,600 m exemplifies its monsoon-forest habitat, where it thrives in deep shade and high atmospheric humidity.

The plant is a succulent, rhizomatous to shortly caulescent herb with reddish, hispid stems. The asymmetric, palmately lobed leaves give the species its epithet: they are broadly ovate in outline, deeply incised into several acuminate, toothed lobes, often bristly-hairy and frequently marked with a paler or silvery zone above and reddish coloration beneath. As in all begonias the flowers are unisexual and monoecious, borne in axillary cymes; the pink to white male flowers bear two larger and two smaller tepals, while the female flowers have an inferior, three-winged ovary that develops into the characteristic unequally winged, dehiscent capsule containing very numerous minute seeds.

Begonia palmata is taxonomically a notoriously polymorphic species complex, with numerous varieties and segregate names reflecting wide variation in leaf division and indumentum across its range. Such variability has made it a focus of biogeographic and systematic study within the megadiverse genus Begonia. Many of its forms are cultivated as foliage ornamentals, and its broad distribution underlines the high endemism and diversification of begonias in the wet forests of tropical Asia.

Author: D.Don · Sources: POWO (Kew), GBIF, Flora of China Vol. 13, Flora of Bhutan Vol. 2, Tebbitt: Begonias — Cultivation, Identification, and Natural History

Berberidaceae

Berberis praecipua

by GP Jürgens

C.K.Schneid.

Bhutan2014 590
Bhutan Gogona 3000m, May
Bh2008 25 P43
Bhutan Paro 2300m, April

Description

Berberis praecipua is an eastern Himalayan barberry centred on Bhutan and adjacent India, Nepal and southern China, with about 39 occurrences (the additional records from Canada and Britain representing cultivated or herbarium material). It grows in temperate forest margins, open hillsides, scrub and clearings, typically between roughly 2300 and 3300 m. The photographed plants from Gogona at 3000 m (May) and Paro at 2300 m (April) in Bhutan illustrate its spring flowering across this montane belt, where it occupies sunny, well-drained slopes within and around mixed conifer and broad-leaved forest.

It is a deciduous, much-branched spiny shrub with terete, often reddish-brown young shoots armed with three-fid spines derived from modified leaves. The foliage leaves are clustered on short shoots in the axils of the spines, obovate to oblanceolate, with an entire to spinulose-toothed margin, glaucous beneath. The flowers are yellow, borne in pendulous racemes or fascicles, each with the typical Berberis arrangement of six sepals in two whorls, six petals each bearing two basal nectariferous glands, and six stamens with sensitive filaments and valvate anther dehiscence. The ovary is superior and unilocular, ripening into an ellipsoid to oblong berry that is red to purplish-black and often pruinose, containing few seeds.

Berberis is a large, taxonomically intricate genus in which the Himalayan deciduous species form a difficult complex separated on fruit, leaf and inflorescence characters; B. praecipua C.K.Schneid. is the accepted name. The bright flowers are insect-pollinated, with the touch-sensitive stamens promoting pollen transfer, while the fleshy berries are dispersed by birds (ornithochory). As a relatively localised eastern Himalayan endemic it has not been formally assessed but appears locally frequent within its range.

Author: C.K.Schneid. · Sources: POWO (Kew), GBIF, Flora of China Vol. 19, Flora of Bhutan Vol. 1, Flora of Nepal, Ahrendt Berberis and Mahonia: A Taxonomic Revision

Berberidaceae

Berberis virescens

by GP Jürgens

Hook.f.

Bh09 251 G419
Bhutan Wanghdi 1900m, June
Nepal 2009 12 ergebnis
Nepal Helambu Sheno-Okrini 2200m, May

Description

Berberis virescens is a deciduous Himalayan barberry distributed through Nepal, northern India, Bhutan and southern Tibet, the numerous additional GBIF country codes reflecting its long cultivation in botanic gardens of Europe, North America and East Asia. In the wild it occupies open slopes, forest edges, scrub and clearings in the temperate zone, generally between 2,500 and 3,500 m. The vouchered plants derive from Wangdue in Bhutan at about 1,900 m in June and from Sheno-Okrini in the Helambu of Nepal at around 2,200 m in May, within the lower part of its montane range where it flowers in late spring.

The species is a shrub up to about 2 m tall with reddish young shoots that become greenish, giving the epithet, and bearing simple, often three-parted spines at the nodes. The leaves are obovate to narrowly spathulate, thin-textured and clustered on short shoots, with entire or sparsely spinulose margins and a glaucous lower surface. The flowers are yellow, borne in few-flowered fascicles or short racemes, with the typical Berberis arrangement of six sepals, six petals and six stamens that snap inward on contact. The fruit is an ellipsoid to oblong berry, red ripening to blackish and often pruinose, containing a few seeds.

Berberis is a large, taxonomically intricate genus in which species are separated by spine, leaf, inflorescence and berry characters; B. virescens is recognised by its green twigs and red autumn fruit. Like its relatives it is an alternate host for rust fungi and a source of the alkaloid berberine. The species is widespread, hardy and frequently grown ornamentally, and is not considered to be of conservation concern.

Author: Hook.f. · Sources: POWO (Kew), GBIF, Flora of China Vol. 19 (Berberidaceae), Grierson & Long: Flora of Bhutan Vol. 1, Ahrendt: Berberis and Mahonia, A Taxonomic Revision

Saxifragaceae

Bergenia ciliata

by GP Jürgens

(Haw.) Sternb.

Sikkim2011 28
Sikkim Lachen 2800m, June
Nepal 97 303 G604
Nepal Honggaon 2360m May
Nepal 2001 463 ergebnis ergebnis
Nepal (Gorkha) Gunda 1700m, May

Description

Bergenia ciliata (Haw.) Sternb. is a robust rosette-forming perennial widely distributed through the Himalaya from Pakistan and Afghanistan eastward across India, Nepal, Sikkim and Bhutan into south-west China. It is a characteristic plant of shaded, moist rock crevices, cliff ledges, stream banks and boulder-strewn slopes in the temperate forest belt, generally between about 1500 and 3000 m. The photographed gatherings span this range, from Gunda in the Gorkha region of Nepal at 1700 m and Honggaon at 2360 m up to Lachen in northern Sikkim at 2800 m, flowering in May and June. It favours cool, humid, semi-shaded microsites with seepage and good drainage, often forming extensive colonies on damp rock.

The plant arises from a stout, fleshy, creeping rhizome bearing the persistent remains of old leaf bases. The leaves are large, obovate to broadly elliptic, rounded and shortly toothed at the margin, and notably ciliate-hairy on both surfaces and margin (the basis of the epithet ciliata), distinguishing it from the glabrous-leaved B. purpurascens. The leafless scape carries a branched cymose panicle of showy flowers; the five petals are white to pale pink, broadly obovate, set off by a reddish calyx and conspicuous stamens, opening often before the new foliage is fully expanded. The fruit is a two-lobed capsule containing numerous small seeds.

Within Saxifragaceae the genus Bergenia is a small Asian group, and B. ciliata is one of its most widespread members, intergrading with relatives where ranges overlap. The thick rhizome ("pashanbhed") is important in Ayurvedic and folk medicine, valued for treating urinary calculi, which has led to heavy wild harvesting. Though not globally threatened, localised over-collection and habitat disturbance make sustainable management of this medicinally prized saxifrage a conservation concern.

Author: (Haw.) Sternb. · Sources: POWO (Kew), GBIF, Flora of China, Annotated Checklist of the Flowering Plants of Nepal, Flora of Bhutan, A Monograph of the Genus Bergenia (Yeo)

Araliaceae

Brassaiopsis glomerulata

by GP Jürgens

(Blume) Regel

Bhutan2014 186
Bhutan Trashyangtse 2150m, May

Description

Brassaiopsis glomerulata is a small tree or large shrub of the eastern Himalaya and Southeast Asia, distributed from India, Nepal and Bhutan through Myanmar, Thailand, Laos, Vietnam, Cambodia, Malaysia and Indonesia into southern China; its c. 954 georeferenced records make it the most widespread member of its genus. It inhabits evergreen broadleaf forest, secondary woodland, ravines and forest margins, generally between 1000 and 2400 m. The plant photographed at Trashyangtse in eastern Bhutan at 2150 m in May grows in the humid subtropical to warm-temperate forest belt where it occupies the understorey and disturbed forest gaps along streams.

It is an evergreen, sparsely branched tree to c. 8-10 m, the young stems and petioles often armed with short prickles. The leaves are large and palmately compound or deeply palmately lobed, long-petioled, with serrate, acuminate leaflets, clustered toward the branch tips in typical araliaceous fashion. The inflorescence is a large terminal panicle of numerous small umbels, the flowers densely aggregated into globose clusters (hence "glomerulata"). The flowers are small, greenish to whitish, with five petals and five stamens and an inferior ovary crowned by a short style. The fruit is a small, globose, fleshy purple-black drupe containing flattened seeds.

Described originally in Hedera by Blume and transferred to Brassaiopsis by Regel, the species belongs to the Araliaceae, the ivy and ginseng family. Its small drupes are dispersed by frugivorous birds, while the open umbels are visited by generalist insects. The leaves and bark feature in regional ethnomedicine. Widespread and adaptable to disturbed habitats, B. glomerulata is not considered threatened across its broad range.

Author: (Blume) Regel · Sources: POWO (Kew), GBIF, Flora of Bhutan, Flora of China, Flora of Thailand, Lowry & Wen's studies of Asian Araliaceae

Araliaceae

Brassaiopsis hispida

by G & P Jürgens

Seem.

Sikkim 2006 309 ergebnis
India West-Bengal, Chaana 1750m, May
Sikkim 2006 455 ergebnis
Sikkim Ringi-Chu 2300m, May

Description

Brassaiopsis hispida Seem. is a prickly shrub or small tree of the ginseng family ranging through the eastern Himalaya and the Sino-Himalayan region. GBIF records document it in India, Nepal, Bhutan, China and Myanmar, reflecting a distribution centred on the moist eastern Himalayan foothills and adjacent uplands. It occupies humid broad-leaved evergreen and semi-evergreen forest, forest margins and ravines, typically between roughly 1,200 and 2,500 m. The collections illustrated from Chaana in West Bengal at 1,750 m and from the Ringi-Chu in Sikkim at 2,300 m, both flowering in May, are representative of its damp montane forest habitat.

The plant is an armed shrub to small tree, the stems and petioles bearing scattered prickles and a hispid indumentum. The large, long-petiolate leaves are palmately lobed or compound, with the lobes or leaflets coarsely serrate and abruptly acuminate, the surfaces rough-hairy. The inflorescence is a terminal panicle of umbels bearing small, greenish to yellowish, functionally polygamous flowers with five petals and a five-merous ovary. The fruit is a small subglobose drupe with the persistent styles at the apex.

Brassaiopsis is a Palaeotropical Asian genus closely allied to Trevesia and Aralia, distinguished by its prickly habit and lobed leaves. B. hispida is one of several morphologically variable Himalayan species, and the genus has attracted phytochemical interest for its triterpenoid saponins. Though locally common in suitable forest, it is sensitive to habitat clearance in the lower hills.

Author: Seem. · Sources: POWO (Kew), GBIF, Flora of China Vol. 13, Flora of Bhutan Vol. 2, Lowry & Frodin: Studies in Asian Araliaceae