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

83. Aster takasagomontanus Sasaki, Trans. Nat. Hist. Soc. Formosa. 21: 151. 1931.

山紫菀 shan zi wan

Herbs, perennial, 8-20 cm tall; rhizomes thickened. Stems erect, simple, moderately strigillose, sparsely minutely stipitate glandular. Leaves basal and cauline; basal leaves rosulate, cauline leaves gradually reduced upward, densely hairy, sparsely to moderately minutely stipitate glandular, rarely eglandular; basal leaves present at anthesis, ascending, narrowly winged petiolate (petiole 0.9-4 cm); blade abaxially paler, ovate to broadly ovate or spatulate, 0.7-2 × 0.5-1.4(-1.9) cm, base attenuate, midvein conspicuous, margin entire or sparsely serrate, apex rounded to obtuse, mucronulate; cauline leaves petiolate, few; blade ovate to lanceolate, 2-3 cm, base attenuate to cuneate, margin serrate, apex obtuse to acute; uppermost leaves sessile, narrowly ovate to lanceolate, 2-2.5 cm, serrate. Capitula solitary or 2-5 in terminal corymbiform synflorescences, 3-3.5 cm in diam.; peduncles slender, 2-6 cm; bract 1 or absent, linear-oblanceolate, densely strigillose, eglandular. Involucre hemispheric, 0.7-1 × 1.5-1.7 cm; phyllaries 3-seriate, subequal, densely strigillose, adaxially strigillose at apex; outer phyllaries oblong to lanceolate, 6-9 × 1-2 mm, leaflike, margin narrowly scarious, ciliate, apex obtuse to acute, tinged reddish purple; inner phyllaries linear-lanceolate, 6-9 × 1-1.2, ± leaflike distally, margin scarious, erose, ciliate distally, acute. Ray florets 13-22, white, tube minutely hairy, minutely stipitate glandular, lamina ca. 7 × 2 mm, glabrous, eglandular; disk florets yellow, 3.5-4 mm, tube and proximal limb sparsely to moderately hairy, eglandular, limb funnelform, 2.5-2.8 mm, lobes spreading, triangular, unequal, 1-1.5 mm. Achenes narrowly obovoid, ± compressed, 3-4 mm, 2-ribbed, moderately to densely strigillose, densely minutely stipitate glandular. Pappus 4-seriate (unclearly), dirty white, bristles barbellate throughout; outermost bristles few, slender, ca. 1 mm; outer bristles few, slender, 2-2.5 mm; inner bristles ca. 3 mm, acute; innermost bristles 3.5-4.5 mm, weakly clavate. Fl. Jul-Sep. 2n = 18*.

● Among exposed rocks on slopes, alpine regions; 3400-3700 m. Taiwan.


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