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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Dubyaea

5. Dubyaea tsarongensis (W. W. Smith) Stebbins, J. Bot. 75: 17. 1937.

察隅厚喙菊 cha yu hou hui ju

Lactuca tsarongensis W. W. Smith, Notes Roy. Bot. Gard. Edinburgh 12: 211. 1920; Crepis tsarongensis (W. W. Smith) J. Anthony.

Herbs 6-30 cm tall, perennial, usually rosulate, with a taproot and a short ± subterranean caudex. Stem slender, usually unbranched or rarely 1-branched, glabrous, leafless and with only a few linear bracts or more rarely with a few leaves in basal portion. Rosette leaves oblanceolate to elliptic, 3-11 × 0.5-1.5 cm, glabrous, base usually ± attenuate into a petiole-like portion, margin entire or sparsely mucronulate-dentate, apex rounded and mucronulate. Stem leaves (if present) 1-3, oblanceolate to lanceolate, smaller than rosette leaves, base attenuate to ± auriculately clasping, otherwise similar to rosette leaves. Capitulum solitary or more rarely a pair, pendent, with 15-25 florets. Involucre narrowly campanulate, 1.2-1.6 cm. Phyllaries abaxially ± uniformly dark green, glabrous, apex acute; outer phyllaries ovate to broadly lanceolate, approaching inner ones in length; inner phyllaries ca. 8. Florets yellow. Achene not seen when mature, ca. 5 mm, apex truncate. Pappus yellowish, 6-8 mm. Fl. and fr. Aug-Oct.

Scree slopes, alpine meadows; 2500-4100 m. Yunnan [N Myanmar].

Dubyaea chimiliensis (W. W. Smith) Stebbins, formerly considered as conspecific with D. tsarongensis and distinguished only at infraspecific rank, is actually a markedly distinct species with a localized distribution in N Myanmar, as was first recognized by Stebbins (Mem. Torrey Bot. Club 19(3): 22-24. 1940). Dubyaea tsarongensis appears actually more closely related to D. gombalana.


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