19. Chrysanthemum dichroum (C. Shih) H. Ohashi & Yonekura, J. Jap. Bot. 79: 188. 2004.
异色菊 yi se ju
Dendranthema dichroum C. Shih, Bull. Bot. Lab. N. E. Forest. Inst., Harbin 6: 8. 1980 ["dichrum"].
Herbs, perennial, ca. 30 cm tall, with robust rhizomes. Primary stems inconspicuous, much branched from base, densely pubescent, leafy. Petiole ca. 5 mm; leaf blade oblique, elliptic or narrowly elliptic, 1-1.5 × 0.5-1 cm, pinnatisect, abaxially white or gray-white, densely appressed pubescent, adaxially green, glabrous or nearly so, lateral segments 1-paired, narrowly elliptic or lanceolate, terminal segments similar to lateral ones, 2-dentate on one side, 1-dentate on other; apex cuneate-attenuate; leaves below capitula linear, entire. Synflorescences terminal on branches. Capitula usually solitary (or up to 3), small; peduncles densely appressed pubescent. Involucres cup-shaped, ca. 5 mm in diam.; phyllaries in 3 rows, abaxially densely pubescent, scarious margin broad, outer ones lanceolate, ca. 1.5 mm, apex rounded, brown, scarious, middle and inner ones elliptic, ca. 2.5 mm, middle ones densely pubescent abaxially, inner ones glabrous abaxially. Ray floret lamina yellow, ca. 3 mm. Achenes ca. 1 mm. Fl. and fr. Aug.
● Mountain slopes. Hebei (Neiqiu).
In the protologue, the epithet is given as "dichrum," which cannot be translated. It seems rather likely that it must be a typographical error for "dichroum," perhaps referring to the 2-colored leaf blades mentioned in the protologue.