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Flora of Taiwan | Family List | Compositae

Gynura Cass.

三七草屬

PENG, Ching-I & CHUNG, Shih-Wen

Gynura elliptica

Credit: HAST

Succulent herbs, rarely undershrubs, glabrous or hispid. Leaves alternate, entire, toothed or pinnatisect. Heads solitary or in corymbs, bracteolate at base, homogamous, discoid, yellow or purplish. Florets all bisexual, fertile, tubular, limb 5-toothed. Involucre cylindric or subcampanulate, calyculate at base, bracts 10-12, in 1 series, narrow, equal, with scarious margins. Receptacle flat, pitted or shortly fimbrillate. Anther base entire or subauriculate. Style arms slender, tips long, subulate, hispid. Achenes narrow, many-ribbed. Pappus copious, bristles slender, white.

About 40 species in tropical Africa and Asia, Madagascar and northern Australia. Four species in Taiwan.

Davies, F. G. 1979. The genus Gynura (Compositae) in Eastern Asia and the Himalayas. Kew Bull. 33(4): 629-640.


KEY TO SPECIES

1 Leaves often lyrate-pinnatifid, pinnatifid or coarsely dentate.   Gynura japonica
+ Leaves not cleft, rarely pinnatifid.   (2)
       
2 (1) Leaves lyrate, ovate, margins irregularly serrate.   (3)
+ Leaf simple, elliptic, margins entire or sparsely mucronulate.   Gynura elliptica
       
3 (2) Lower surface of leaves violet.   Gynura bicolor
+ Lower surface of leaves pale green.   subsp. formosana

Lower Taxa

Related Synonym(s):


 

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