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

3. Sinosenecio dryas (Dunn) C. Jeffrey & Y. L. Chen, Kew Bull. 39: 231. 1984.

川鄂蒲儿根 chuan e pu er gen

Senecio dryas Dunn, J. Linn. Soc., Bot. 35: 504. 1903.

Herbs, scapigerous. Rhizomes 3-6 mm in diam., with distinct brown villous internodes and slightly swollen nodes, clad in persistent brown petiole bases. Stems solitary, erect, scapiform, 15-33 cm tall, simple, densely brown villous, usually with 3-5 bracts; bracts ovate-lanceolate or linear-lanceolate, 5-10 mm, membranous, densely brown villous, apex acute or acuminate. Leaves several, radical, rosulate, long petiolate; petiole 5-10 mm, densely villous, with brown or reddish brown hairs; blade abaxially green or purplish, adaxially green, orbicular, 3-6 × 3-6 cm, shortly palmately 5-7-lobed, papery, abaxially brown villous on veins or subglabrous, adaxially at first sparsely villous, glabrescent, base cordate, palmately 5-veined, veins prominent abaxially; lobes ovate-triangular, apically callose-mucronulate lobed; terminal lobe rather larger than lateral lobes and sometimes shortly 3-lobulate, apex obtuse. Capitula solitary, terminal, 2.5-3 cm in diam. Involucres campanulate, obconic-campanulate when flattened, (6-)8-10 × 6-8 mm, not calyculate; phyllaries 10-13, lanceolate or oblong-lanceolate, 8-10 × 2-2.5 mm, herbaceous, densely villous and shortly glandular hairy, margin scarious, apically acuminate and green or reddish purple. Ray florets 10-13, ca. 14 mm; corolla tube ca. 3.5 mm; lamina yellow, ovate-oblong, ca. 11 × 2-2.2 mm, 7-veined, apically 3-denticulate. Disk florets many; corolla yellow, ca. 7 mm, with 3-3.5 mm tube and campanulate limb; lobes oblong-ovate, ca. 2 mm, apex acute, papillose. Anthers oblong, ca. 2.5 mm, basally obtuse, appendages ovate-oblong. Style branches ca. 1 mm. Achenes (immature) cylindric, 3-3.5 mm, smooth, glabrous. Pappus white, 4-6 mm. Fl. May-Jun, fr. Jul-Aug. 2n = 60*.

● Stony slopes, wooded cliffs; 2000-2100 m. E Chongqing (Wushan), W Hubei.

Sinosenecio dryas is similar to S. villifer but differs in having plants and leaves smaller, rhizomes slender, and capitula strictly solitary.


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