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28. Aster oldhamii Hemsley, J. Linn. Soc., Bot. 23: 414. 1888.

台北狗娃花 tai bei gou wa hua

Heteropappus hispidus (Thunberg) Lessing subsp. oldhamii (Hemsley) Kitamura; H. oldhamii (Hemsley) Kitamura.

Herbs, biennial, 50-60 cm tall, taprooted. Stems erect, sometimes decumbent, branched from lower part; branches ascending, sparsely to moderately (upward) villous-strigose, strigillose, with sessile glands upward. Leaves thick, margin entire, strigose-ciliate; basal leaves rosulate, withered by anthesis; blade spatulate-oblong, 8-15 × 3-6 cm, glabrous or glabrate, base attenuate, apex rounded; cauline leaves spatulate-oblong or narrowly obovate to oblong, 2.5-4.5 × 0.8-1.7 cm, glabrate, base cuneate, margin entire, strigose-ciliate, apex rounded; uppermost leaves remote, oblanceolate, gradually reduced, 0.5-1.2 × 0.2-0.4 cm. Capitula radiate or sometimes discoid, terminal, solitary on branches, forming open paniculate-corymbiform synflorescences, ca. 25 mm in diam. Involucres hemispheric, 0.6-1 cm in diam.; phyllaries 2-seriate, subequal, lanceolate to spatulate or oblanceolate (inner), 5-6 mm, ± strigose, margin sometimes partly scarious, strigose-ciliate, apex acute to acuminate. Ray florets sometimes absent, whitish, ca. 10 × 1.3-3 mm, tube 1-1.7 mm, sparsely hairy; disk florets 3-4.5 mm, tube 0.8-1.5 mm, tube and limb hairy, limb narrowly campanulate to campanulate, lobes unequal, 1 longer, 0.4-0.6(-1.3) mm, minutely with sessile glands and/or strigose-hairy. Achenes obovoid to broadly obovoid, compressed, 1.8-2.5 mm, strigose. Pappus of ray florets whitish, lacerate scales 0.4-1(-1.5) mm, of disk florets reddish, stout bristles 1.8-2.5(-3.5) mm.

● Rocky seashores; sea level. N Taiwan (Taibei).

Some individuals of Aster oldhamii are without ray florets (capitula discoid) and have been called Heteropappus oldhamii f. discoidus Kitamura (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol. 13: 321. 1937; 盘状台北狗娃花 pan zhuang tai bei gou wa hua).


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