Piper rhytidocarpum Hook

Mukherjee, Prasanta Kumar, 2018, Nomenclatural notes on Piper Linn. (Piperaceae) from India II, Phytotaxa 338 (1), pp. 17-32 : 27

publication ID	https://doi.org/10.11646/phytotaxa.338.1.2
persistent identifier	https://treatment.plazi.org/id/4012878C-FF88-7463-6DF2-82A0FAFCFAE2
treatment provided by	Felipe
scientific name	Piper rhytidocarpum Hook
status

Treatment

18. Piper rhytidocarpum Hook View in CoL , f. Fl. Brit. India 5(13): 92. 1886.

Replaced synonym:— Piper nigrum Linn. var. macrostachyum C. DC. Prodr. 16: 363. 1869 non Piper macrostachyum (C. Presl.) C. DC.

Prodr. 16: 371. 186. Type:— INDIA: Meghalaya, Khasia mountains, Hook. f. & T. Thomson s. n. ( holotype G-DC G 00207656 image!; isotype CAL!, K

000794409 image!). P. crassistipes C. DC. Candollea View in CoL 2: 214. 1925 syn. nov. Type:— INDIA: Assam, Jenkins s. n. ( holotype BO130555!; isotype CAL!). P. glabramentum C. DC. Candollea View in CoL 2: 211. 1925 syn. nov. Type:— INDIA: Assam, Namrod forest, Mann s. n. ( lectotype designated here CAL!; isolectotype G-DC G00314035 image!; syntype

Goalpara, Lidli Duars plains, King’s collector s. n. CAL!, G-DC G00314813 image!, Fischer s. n. CAL!, K000794452 image!, GDC G 00314844 image!).

Distribution:— INDIA: Assam, Meghalaya, Arunachal Pradesh, Nagaland, Tripura; CHINA, MYANMAR.

Note:— Piper nigrum var. macrostachyum was based on the specimen ‘Khasia mountains, Hook. f. & T. T. s.n. ’ held at G-DC. The same is also present at CAL and K with de Candolle’s annotation. Hooker (1886: 92) recognized the taxon at the specific rank as P. rhytidocarpum¸ without stating it explicitly as a replacement name for P. nigrum var. macrostachyum , so as not to create a later homonym of P. macrostachyum (C. Presl) C. DC. [1869: 371; basionym: Artanthe macrostachya C. Presl. (1851: 227) ]. Hooker ( loc. cit.) needlessly cited three additional specimens: Wallich 6658B, Griffith s.n., and Chittagong, J. D. H. & T. T. s.n. Notwithstanding citation of additional material by Hooker ( loc. cit.), the name P. rhytidocarpum is typified by P. nigrum var. macrostachyum C. DC. (.c.f.. Art. 7.4, McNeill et al.,2012)., with the type located at G-DC. Since only a single collection was cited, this must be accepted as the holotype. Therefore, the action by Gilbert & Xia (1999: 194) in designating ‘ Bangladesh, Chittagong, 22 Sep. 1850, Hooker & Thomson s.n.’ at K as the lectotype turns out to be incorrect. Piper glabramentum is similar to this species and hence it is recognized as a synonym. The same is true for P. crassistipes , when its holotype at BO, isotype at CAL, or the pencilled sketch of the foliage by C. de Candolle at G-DC (G 00329644) are compared.