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| 0277 |
Southern Tibet : vol.6 |
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OCR Text
29
The specimens agree well with the var. *virgata* Maxim. (l. c. 495) of this poly-
morphous species.
*Geogr. area:* Mongolia, Northern China, Tibet, Western Himalaya (? *S. virgata* D. C.).
*Scorzonera mongolica* Maxim., in Bull. Acad. Imp. Pétersb. XXXII (1888) 492.
Northern *Tibet*, Mandarlik, 3437 m., medio July 1900 (flowering hardly yet begun).
MAXIMOVICZ mentions (l. c. 493) a »var. foliis distinctius trinerviis sensim acu-
minatis minusque carnosis» from Gobi, which seems to be our plant.
*Geogr. area:* Mongolia.
*Chondrilla polydichotoma* Ostf. nov. sp. (Pl. III, Fig. 2).
Herba perennis, glaber. Caulis erectus, 35—40 cm. altus, ramosissimus ramis
permultis divaricato-dichotomis. Folia basalia caulorum squamiformia; caulina inferiora
brevi-oblonga basi semi-amplectante, cetera in squamis minutis triangulari-setaceis
reducta. Capitula parva, 3—8-flora, subcylindrica, 8—10 mm. longa, in apicibus
ramorum ultimorum pedunculata. Squamæ involucri glabræ, exteriores paucæ, breves,
obovatæ, interiores multo longiores oblongæ, obtusæ, margine ± membranaceo. Corollæ
flavæ (?). Achenia matura non visa, immatura parva, superne vix angustata trun-
cata, costata, subcompressa, conformia.
Ex affinitate *Ch. pauicifloræ* Ledeb. et *Ch. leiosperme* Kar. et Kir., differt
ramis divaricatis, foliis basalibus caulorum squamiformibus, glabritate totius plantæ etc.
East-*Turkestan*, Gölme-Kati, freshwater pool at lower Tarim, 880 m.; 19th May 1900
(flow.; typus!); Camp I, Dunglik, 882 m., 1st July 1900 (flow.).
This remarkable plant has been referred to *Chondrilla* with some hesitation
as the very young achenes do not show any definite character; but it has so much
general likeness to *Ch. parviflora* Ledeb. in habit, shape of the heads and the in-
volucral bracts etc., that I think the reference is correct.
*Mulgedium tataricum* (L.) D. C. Prodr. VII (1838) 248; Ledeb., Fl. Ross. II, 2
(1846) 842; Fedtschenko, in Acta Horti Petrop. XXI (1903) 369, XXIV (1904) 136;
*Lactuca tatarica* C. A. Mey.; Stewart, in Bull. Torrey Bot. Club (1916) 647.
East-*Turkestan*, Lower Tarim, 830 m., summer 1900 (leafy shoots only);
Camp XVI, Tuna-toghdi, eastern Tarim, 825 m., 8th June 1900 (leafy rosettes only).
*Geogr. area:* Southern Russia, Caucasus, Siberia, Afghanistan, Pamir, Turkestan,
Tibet, Kansu.
*Sonchus dentatus* Ledeb. Fl. Alt. IV (1833) 141; Icon. pl. Fl. ross. tab. 87;
Fl. Ross. II, 2 (1846) 835.
Var. *tibeticus* Ostf. nov. var. Differt a typo lævitatc squamarum involucri, et
colore corollæ: albescente in parte majore, sed dentibus apicalibus et parte superiore
inferne roseo.
Northern *Tibet*, Kash-otak, 2916 m., beginning of Aug. 1900 (flow.).
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