Bupleurum pamiricum Pimenov & Kljuykov, 2015

Pimenov, Michael G. & Kljuykov, Eugene V., 2015, A new species of Bupleurum (Umbelliferae) from Badakhshan, with notes on and a key to the alpine species of High Asia, Phytotaxa 226 (3), pp. 245-252 : 249-250

4. Bupleurum pamiricum Pimenov & Kljuykov , sp. nov. ( Figs. 1 , 2 , 3 )

Nostra species nova speciebus Bupleuro gracillimo et Bupleuro aitchisonii affinis est, sed ab illa, qui proxima est, caulibus tenuibus (1 mm non 2 mm in diam.), pedicellis longioribus (1.5–2 mm non 0.5–1 mm long), bracteolis 4–5, non 6–9, stylopodiis flavo-brunneis (non atroviolaceis), mericarpiis brevioribus (3.0– 3.5 mm,non 4–5 mm longis, 0.8–1.0 mm, non 1.2–1.3 mm latis) differt; a Bupleuro aitchisonii radicibus tenuibus (2–3 mm non 3–7 mm in diam.), caudicibus eramosis, foliis caulinis 3–6 (non 1–2) angustioribus, pedicellis longioribus, fere fructibus aequilongis bene dignoscitur.

Type: — TAJIKISTAN. Gorno-Badakhshan Autonomous Province: the Pamirs, between Murgab and Dzhilandy, riv. Nichke-Dzhilga (tributary of Murgab river), 27 July 1981, Pimenov, Kljuykov, Baranova, Vasilieva & Tomkovich 892 ( MW).

Procumbent, slender, polycarpic glabrous herbs; tap-root thin, 2–3 mm in diam.; rootstock not branched, covered with fibrous remains of dead leaves; stems several (up to 5–7), procumbent or ascending, thin (ca 1 mm in diam.), solid, 20–30 cm long, terete, with short primary branches; below umbel slightly ribbed; central stem not distinct. Leaves basal and cauline; basal leaves rosulate, entire, narrow linear, acute, ca 3–4 cm long, 1–1.5 mm wide, with 2 or 3 veins; stem leaves 3–6, slightly lesser than basal, sessile, often scarsely enlarged at the base; uppermost leaves 1–1.5 cm long. Terminal umbels 1.5–2 cm in diam, with peduncle 4–5 cm long; bracts 3–4, lanceolate-linear, with 3 veins; rays 3–5; strongly unequal; umbellets of 7–12 flowers; bracteoles 4 or 5, lanceolate, longer than pedicels; pedicels 1.5–2 mm long, slender. Calyx teeth lacking; petals light-yellow, convolute, 0.5–0.6 mm long, at tip nearly entire; stylopods brown, flattened; styles ca 0.6 mm long, reflexe. Fruits (not completely mature) glabrous, obovate to lanceolate, slightly compressed laterally; carpophore bifid, ribs subequal, short-keeled; exocarp of small cells with slightly thickened outer walls, commissure narrow, mesocarp parenchymatous, vittae 3–5 per furrow, 4–6 on commissural side; endosperm flat on commissural surface.

Phenology:— Blooms in late June and July, probably the first half of August; not completely mature fruits—July–

August; collections with mature fruits lacking; probably germinating seeds do not ripen each year.

Distribution and habitat:— East (true) Pamirs in Tajikistan, i.e. alpine plateau in basins of Murgab and Ok-su rivers, and upper stream of Wakhandara river in Afghanistan (“Little Pamirs”) ( Fig. 4 ). Although here are no data on distribution of the species in adjacent West Xinjiang ( China) and Pakistan (especially in districts of Chitral and Hunza), but the plant may occur there.

Etymology:— The specific epithet refers to the geographical origin of the species.

Additional specimens examined:— TAJIKISTAN. Pamirs, from Karasu to Chatyrtash , 16 July 1901, O. Fedtschenko ( LE!) ; Pamirs, basin of Murgab river, Kara-su. 26 Juny 1973. Pimenov et al. 1173 ( MW!) ; East Pamirs, Chechekty , alt.= 4500 m, Ikonnikov (herbarium Chechekty!) ; Pamirs, Naizatash pass, alt.= 4130 m, 06 August 1969, Pimenov et al. 1812 ( MW!) ; East Pamirs, mountain massif Aktash , W slope, screes, alt.= 4000 m, 09 Juny 1953, Ikonnikov ( LE!) ; N Alichur ridge, left bank of Nichke-Dzhilga river , 8 km W of mouth, screes, alt.= 4200 m, 06 July 1963, Grebennikova 63 ( LE!, TAD!) ; East Pamirs, valley of Ok-su, Kurgankol loco, 2–3 km from Shaiman , alt.= 4100 m. Abdusaljamova ( TAD!) .— AFGHANISTAN. Prov. Badakhshan, östlisher Wakhan, Qizil Qabchal Tal , S des Kol-e Cheqmaqtin , 4150–4350 m. 15 Juli 1971. Anders 7457 ( LE!) .

5. Bupleurum rupestre Edgew. (1846: 52) . Type:— INDIA. Himala, ad alt. ped. 11000–12000, in rupibus ad cacumen montis Chur, Edgeworth (holotype K!).

Syn.: Bupleurum falcatum L. (1753: 237) var. nigrocarpum Jacquem. ex C.B. Clarke (1879: 676) . Type:— PAKISTAN / INDIA. N.W.Himalaya; alt. 10000–14000 ft., Jacquemont 1492 (syntype K!).

Syn.: Bupleurum aitchisonii (Boiss. 1888: 252) H. Wolff (1910:142) var. caudatum H. Wolff (1910: 143) . Type:— INDIA. Himalaya: Lahul, an sonnigen Abhängen häufig [Lahul, Punjaub], 1865, Jaeschke 80 (holotype K!).

Syn.: Bupleurum aitchisonii (Boiss. 1888: 252) H. Wolff (1910:142) var. atroviolaceum O.E. Schulz (1933: 876) . ≡ Bupleurum atroviolaceum (O.E. Schulz 1933: 876) Nasir (1972: 54 , fig. 16). Type:— INDIA. Nordwest-Indien: Luderwas above Sonamarg, alt. 13000 ft., 11 August 1928, Stewart 9880 (lectotype RAW; designated by Nasir (1972: 54) as “type”; isolectotypes K!, NY, UC).

Syn.: Bupleurum falcatum L. (1753: 237) var. afghanicum Kitam. (1960: 284) . Type:— AFGHANISTAN. Nuristan: Eschtaway, 05 August 1955, Kitamura (holotype KYO!).

Procumbent or erect, slender herbs; stems simple or branching at the base; leaves basal and cauline, linear to linear lanceolate; bracts 1–4, lanceolate to ovate; rays 2–8, slender, unequal; bracteoles ovate to oval, exceeding or equal to umbellets; petals dark-red; stylopods deep-purple; fruits 2.5–3 mm long, 2 mm broad; vallecular vittae 3 per furrow, commissural 4.

Distribution:— India (W Himalaya: Jammu & Kashmir, Himachal Pradesh, Uttaranchal), Pakistan, Afghanistan (NE; E).

Figures

FIGURE 1. Bupleurum pamiricum, a’ habit, b’ umbellet, c’ flower. Voucher: Pimenov et al. 892 (MW).

FIGURE 2. Fruit of Bupleurum pamiricum, in lateral (A) and dorsal view (B), as well as B. gracillimum in dorsal view (C): Vouchers:A & B = Pimenov et al. 1812 (MW); C = Pimenov & Kljuykov 139 (MW). Scale bar = 1 mm.

FIGURE 3. Transverse sections through the mericarps of Bupleurum pamiricum (a) and B. gracillimum (b). Vouchers: A = Pimenov et al. 1812 (MW); B = Pimenov & Kljuykov 139 (MW). 1’: exocarp, 2’: mesocarp, 3’: vascular bundles, 4’: secretory ducts (vittae), 5’: rib secretory duct, 6’: endosperm. Scale bar = 1 mm.

FIGURE 4. Distribution map of Buplerum pamiricum.