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

25. Synotis nagensium (C. B. Clarke) C. Jeffrey & Y. L. Chen, Kew Bull. 39: 321. 1984.

锯叶合耳菊 ju ye he er ju

Senecio nagensium C. B. Clarke, J. Linn. Soc., Bot. 25: 39. 1889; Inula vernoniiformis H. Léveillé; Pulicaria kouyangensis Vaniot; S. densiflorus Wallich ex Candolle var. fargesii (Franchet) Handel-Mazzetti; S. densiflorus var. mishmiensis J. D. Hooker; S. hugonis S. Moore; S. prionophyllus Franchet; Vernonia fargesii Franchet.

Subshrubs or herbs, rhizomatous. Stem erect, to 150 cm tall, densely whitish tomentose or fulvous tomentose, branching in synflorescence, leafless in lower part at anthesis. Leaves shortly petiolate; petiole 5-25 mm, densely tomentose and often also setulose with reddish brown hairs; blade adaxially green, obovate-elliptic, oblanceolate-elliptic, or elliptic, 7-23 × 2.5-8.5 cm, papery, abaxially densely whitish tomentose or fulvous tomentose and brownish setulose especially on veins, adaxially sparsely arachnoid-tomentose and shortly scattered pubescent, pinnately veined, lateral veins 20-26(-30), arcuate-ascending, prominent adaxially, base cuneate or cuneate-attenuate, margin finely to coarsely mucronulate-serrate or biserrate, apex shortly acuminate; upper and branch leaves smaller, shortly petiolate, narrowly elliptic or lanceolate. Capitula heterogamous, disciform or minutely radiate, numerous, arranged in narrow, simple, to spreading, compound, terminal and upper axillary paniculoid thyrses; peduncles 5-12 mm, densely tomentose and sometimes also ferruginous setulose, linear-bracteate. Involucres obconic-campanulate, 7-8 × 4-6 mm, calyculate; bracts of calyculus ca. 8, usually linear, equaling phyllaries, sometimes leaflike and much exceeding phyllaries; phyllaries 13-15, linear, 1-1.5 mm wide, herbaceous, very densely tomentose, margin narrowly scarious, apically acute. Female florets 12 or 13; corolla yellow, filiform, or minutely radiate, ca. 6 mm, minutely 3-denticulate. Disk florets 12-20; corolla yellow, ca. 6 mm, with ca. 3 mm tube and funnelform limb; lobes ovate-lanceolate, ca. 1.5 mm, apically acute. Anthers ca. 3 mm; anther tails ca. 0.75-2 × as long as antheropodia; appendages ovate-oblong; antheropodia rather long and narrow, basally hardly dilated. Style branches ca. 1.5 mm, fringed with short papillae, terminal tuft indistinct. Achenes ca. 1.7 mm, sparsely pubescent. Pappus white, ca. 5 mm. Fl. Aug-Mar.

Woods, thickets, meadows; 100-2000 m. Gansu, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Sichuan, Xizang, Yunnan [NE India, N Myanmar, N Thailand].


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