Heterostemma alatum Wight (1834: 42)

Rodda, Michele, 2016, Checklist and typification of Heterostemma (Apocynaceae, Asclepiadoideae, Ceropegieae), Phytotaxa 263 (1), pp. 1-17 : 4

Heterostemma alatum Wight (1834: 42) [Dec 1834] (as ‘ alata ’)

TYPE:— NEPAL, Chundragherry?, Herb. R. Wight. propr., Wight Asclep 136 [=Wall. Cat. 8180] (lectotype K [K000895032], here designated, isotypes, E [E00179594], K, ex parte [as Wall. Cat. 8180, K000974160])

= Hoya alata nom . nud. on sheet [K000974160]

= Heterostemma dentatum W. T Wang nom . nud. on sheet [KUN0267852 and numerous other specimens in KUN]

Notes: —The materials mentioned in the protologue of H. alatum were clarified by Noltie (2006) as ‘ Nepal, Wallich, Wall Asclep 136 [=Wall. Cat. 8180]. Massooree, [J.F.] Royle’. Kambale et al. (2015), selected sheet [K000974160] as the lectotype of H. alatum . This sheet however contains two gatherings, the first from Naglerquhn, bearing date July 1821, the other from Chundragherry?. It is impossible to separate which part of the specimen belongs to which collection and therefore select part of the sheet as lectotype of H. alatum .

In Linn Soc. MS SP 1284 the entry under under No. 136 is ‘ Hoya alata Wall , 1 sh. Nepalia’. This means that only a single sheet from Wallich herbarium was in Wight’s hand when describing H. alatum . This can be identified as [K000895032], a well-preserved specimen with an attached description of the species and a sketch of a dissected flower in Wight’s hand. This sheet is instead here selected as lectotype for H. alatum . If this was the only specimen mentioned in the protologue it would be a holotype following Noltie (2006: 134). Another specimen at LIV was collected by Royle in Massooree and bears a note in Wight’s hand and it is a syntype [acc. no. LIV1952.121.4425].