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

18. Vernonia attenuata Candolle, Prodr. 5: 33. 1836.

狭长斑鸠菊 xia chang ban jiu ju

Acilepis attenuata (Candolle) H. Robinson & Skvarla.

Herbs, perennial, 30-70 cm tall or more. Stems erect, ± woody at base, simple or inflorescence-branched in upper part, green, striate, adpressed puberulent and glandular. Leaves clustered below synflorescence branches; petiole sometimes absent, 2-5 mm, densely puberulent; leaf blade of lower leaves obovate or obovate-elliptic, rarely obovate-oblong, 7-14 × 3-5 cm, thinly leathery, abaxially sparsely puberulent along veins, adaxially glabrous, concavely glandular, lateral veins 6-8-paired, convex, veinlets prominently reticulate on both surfaces, base broadly cuneate or subrounded, margin sparsely mucronulate-denticulate, apex acuminate or shortly acute, rarely obtuse; upper leaves few, remote, linear or linear-lanceolate, 3.5-12 × 0.8-2 cm, base rounded, margin inconspicuously finely toothed or subentire, apex acuminate. Synflorescences terminal, lax, flat-topped panicles sometimes plus solitary, axillary capitula at lower nodes. Capitula usually 3-5, 10-12 mm in diam.; peduncles 7-15(-20) mm, densely yellowish puberulent and glandular; bracteole 1, at base. Involucre obconical, 8-10 × ca. 8 mm; phyllaries 6-seriate, green or apically reddish purple, oblong to linear, margin and apex yellowish puberulent, dorsally subglabrous, apex subscarious, apiculate, outer short and small, subulate, inner ca. 8 × 1 mm, glabrous, with narrowly scabrid margins. Receptacle flat, foveolate. Florets 15-20; corolla reddish purple, tubular, 7-8 mm, sparsely glandular; lobes linear-lanceolate, glandular at apex. Achenes subcylindric, ca. 3 mm, 10-ribbed, densely villous and glandular. Pappus 2-seriate, white; outer setae few, short; inner setae ca. 6 mm, scabrid. Fl. Oct-Feb. 2n = 18.

Thickets or lax forests in valleys; 600-1100 m. S Yunnan [India (Sikkim), Myanmar].

The taxon was first named "Conyza attenuata" (in Wallich, Numer. List, no. 3030. 1831), which is a nomen nudum and was therefore not validly published.


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