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

13. Chrysanthemum arisanense Hayata, Icon. Pl. Formosan. 6: 26. 1916.

阿里山菊 a li shan ju

Dendranthema arisanense (Hayata) Y. Ling & C. Shih.

Herbs, perennial, ca. 40 cm tall, with creeping rhizomes. Stems ascending, shortly corymbosely branched from middle, densely pubescent, soon glabrescent. Lower stem leaves shed by anthesis. Middle stem leaves: petiole 1-2 cm; leaf blade ovate, 3-5 × 2-3 cm, 2-pinnatisect; primary segments 1- or 2-paired; ultimate segments obliquely triangular, abaxially grayish white, densely and thickly pubescent, adaxially green, sparsely pubescent. Distal stem leaves gradually smaller, similar to middle stem leaves. Synflorescence a terminal subumbellate panicle. Capitula many, ca. 1.2 cm in diam. Involucre cup-shaped, ca. 7 mm in diam.; phyllaries in 4 rows, scarious margin broad, white or brown, outer ones ovate or narrowly ovate, 3-4 mm, middle ones elliptic or narrowly elliptic, 4-4.5 mm, inner ones narrowly elliptic or broadly linear, ca. 3 mm. Ray floret lamina yellow, ca. 5 mm. Fl. summer. 2n = 18*.

● Jiangsu, Taiwan.


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