Dioscorea wightii Hook.f., Fl. Brit.

R. S., Pagare, K. C., Kishor & Arisdason, W., 2020, Typification of seven names in Dioscorea (Dioscoreaceae) described by J. D. Hooker, Rheedea 30 (2), pp. 312-316 : 315-316

Dioscorea wightii Hook.f., Fl. Brit. India 6: 291.

1892. Lectotype (designated here, if not holotype): Travancore, Courtallam, August 1835, Wight 2827 (K [K000098200 digital image!]; isolecto CAL [CAL0000024785!]). Fig. 7

Notes: Hooker (1892) described D. wightii based on collection made by Robert Wight from Courtallam, (in Tamil Nadu). Two collections (male specimens), Wight 2827 and Wight 939A, which are matching with the protologue were traced at K. Under the gathering Wight 2827, two herbarium sheets were traced, one each at K (K000098200) and CAL ( CAL0000024785 ), however, only the K specimen was annotated by the author. The herbarium catalogue database of Royal Botanical Garden, Edinburgh indicates Wight 939A (E00179442 and E00179443) as isotypes . There is no evidence to prove which among the available specimens is seen by Hooker. Since the primary deposit of Hooker is at Kew, the specimen bearing the barcode K000098200 (http:// specimens.kew.org/herbarium/K000098200) is selected here as the lectotype.

Figures

Fig. 7. Lectotype of Dioscorea wightii Hook.f. (http://specimens. kew.org/herbarium/K000098200) © The Board of Trustees for The Royal Botanic Gardens, Kew. Reproduced with permission.