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

22. Synotis yakoensis (Jeffrey) C. Jeffrey & Y. L. Chen, Kew Bull. 39: 318. 1984.

丫口合耳菊 ya kou he er ju

Senecio yakoensis Jeffrey, Notes Roy. Bot. Gard. Edinburgh 5: 195. 1912.

Herbs, robust, somewhat shrubby. Stems erect, ca. 90 cm tall, branching in synflorescence, densely white tomentose, setulose with reddish brown multicellular hairs. Leaf petiole 1-1.5 cm, densely white tomentose and brown setulose; blade lanceolate or elliptic-lanceolate, 7-16 × 4-5.5 cm, papery, abaxially densely white tomentose and ferruginous setuliferous especially on veins, adaxially shortly fulvous pubescent especially on veins, pinnately veined, lateral veins 18-20, arcuate-ascending and intramarginally uniting, base rounded, margin apiculate-dentate, apically acuminate-attenuate or acuminate. Upper leaves and leaves of branches shortly petiolate, lanceolate or narrowly lanceolate, gradually smaller, apically attenuate. Capitula minutely radiate, numerous, arranged in globose, rather dense, axillary and terminal corymbs; peduncles 5-10 mm, densely tomentose and brownish setulose, basally bracteate, with a few linear, densely tomentose bracteoles. Involucres cylindric, 6-7 × 2-2.5 mm, calyculate; bracts of calyculus 4 or 5, to 1/2 as long as phyllaries; phyllaries 5, oblong-linear, ca. 1 mm wide, herbaceous, thinly arachnoid-tomentose, margin narrowly scarious, apically obtuse or obtuse-acuminate, puberulent and dark colored. Ray florets 4; corolla tube ca. 4 mm; lamina yellow, ca. 3.5 mm, usually shorter than style, 3-denticulate. Disk florets 7-9; corolla yellow, ca. 8 mm, with ca. 3.5 mm tube and funnelform limb; lobes ovate-triangular, ca. 1 mm, apically acute, puberulent. Anthers ca. 2.5 mm; anther tails ca. 0.3 × as long as antheropodia; appendages ovate-lanceolate; antheropodia slightly dilated at base. Style branches ca. 1 mm, fringed with short papillae, terminal tuft distinct but hardly longer than laterals. Achenes ca. 5 mm, glabrous. Pappus white, ca. 7 mm. Fl. Oct-Nov.

● Open montane slopes and forests; ca. 2000 m. NW Yunnan.


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