Heterostemma villosum Costantin (1912: 122)

Rodda, Michele, 2016, Checklist and typification of Heterostemma (Apocynaceae, Asclepiadoideae, Ceropegieae), Phytotaxa 263 (1), pp. 1-17 : 13

Heterostemma villosum Costantin (1912: 122)

TYPE:— VIETNAM, ‘ad ripas fluminis Song Be’, November 1876, Pierre s.n. (lectotype P [P03899118], here designated, isotype P [P03899117])

Notes: —Numerous specimens are cited by Costantin (1912) in the protologue of H. villosum ‘ Cambodge: (Godefroy, Harmand). Cochinchine: environs de Saigon; plaine des Tombeaux (Lefevre); chemins, bords de la riviere Songbe (Pierre, Thorel). Laos: (Massie)’.

In P the available syntypes are Lefevre 52, Saigon, plaine des Tombeaux 1 September 1864, [P03899097], Massie s.n., ‘Plantes du Laos, entrees le 30 Avril 1895 ’ [P03899098], Harmand s.n. dubiously from Cambodia or from Saigon [P03899101], Harmand 957 [P03899099] and Pierre s.n. specimens collected near the Song Be river in November 1876 [P03899117 and P03899118]. All are identified as H. villosum in Costantin’s hand. The latter specimen [P03899118] is the best preserved and is selected as the lectotype for H. villosum .

A possible syntype labelled ‘environs de Saigon ; plaine des Tombeaux s. coll 4844 ’ is present in L [L2720438].