高能蟹甲草 gao neng xie jia cao

Cacalia nokoensis Masamune & Suzuki, J. Soc. Trop. Agric. 2: 51. 1930; Koyamacalia nokoensis (Masamune & Suzuki) H. Robinson & Brettell.

Rhizomes obliquely ascending. Stem solitary, 45-80 cm tall, erect, 2-3.5 mm in diam., glabrous below, densely shortly crisped-pubescent above; branchlets spreading. Basal and lower leaves fallen at anthesis. Stem leaves numerous, petiolate in median leaves; petioles 2.5-5 cm, not winged, usually with axillary buds at base, sparsely shortly crisped-pubescent; blade abaxially pale green, adaxially green, hastate-triangular, 4-13 × 4.5-10 cm, both surfaces scaly and shortly hairy, base ± cordate, margin denticulate, apex acuminate or long acuminate; lateral lobes acuminate. Upper leaves smaller; uppermost leaves linear. Capitula more numerous, terminal, arranged in panicles, 8-10 mm wide; peduncles 4-10 mm, with 1 or 2 linear bractlets, crisped-hairy. Involucres cylindric, not calyculate, 7-10 × 4-7 mm; phyllaries 7 or 8, linear-oblong, outside densely shortly crisped-hairy, margin narrowly scabrous, apically obtuse. Florets 10-13; corolla yellow, 8-9 mm, with 2.5-3 mm tube and broadly tubular limb; lobes lanceolate, ca. 1.5 mm, apex angularly thickened. Anthers exserted from corolla, basally sagittate-caudate. Style branches excurved, apex obtuse, papillose. Achenes cylindric, ca. 5 mm, glabrous, ribbed. Pappus white, ca. 8 mm, fragile. Fl. Aug-Oct.

● Forest margins on slopes; ca. 2900 m. Taiwan.

Parasenecio nokoensis is similar to P. hastatus in aspect but differs by its leaves unwinged, petioles with axillary buds at the base, phyllaries 7 or 8, and florets 10-13.