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.