Euphorbia motuogensis

Li, Man-Ting, Lan, Xiao-Zhong, Zuo, You-Wei & Deng, Hong-Ping, 2021, Euphorbia motuogensis (Euphorbiaceae), a new species from Xizang, China, Phytotaxa 527 (2), pp. 107-116 : 112-113

Key to the species of Euphorbbia motuogensis , E. sikkimensis , E. stracheyi , E. wallichii and E. rapulum .

1a. Cyathia with 5 equal-sized glands and pileous stem ................................................................................................... E. motuogensis

1b. Cyathia with 4 equal-sized glands and glabrous or puberulent stem .................................................................................................2

2a. Involucral leaves intensely colored, yellow or purplish.....................................................................................................................3

2b. Involucral leaves usually green, without conspicuous pigment .........................................................................................................4

3a. Stems usually in clusters; involucral leaves yellow, caruncle yellow ........................................................................... E. sikkimensis

3b. Stems usually solitary; involucral leaves often flushed dark purplish abaxially, sometimes brownish yellow, caruncle yellow........ ........................................................................................................................................................................................... E. stracheyi

4a. Root usually ± swollen, radishlike, seeds ovoid-terete ....................................................................................................... E.rapulum

4b. Root terete, seeds angulate-terete...................................................................................................................................... E. wallichii