Hydrochorea leucocalyx (Britton & Rose) Iganci, M.V.B. Soares & M.P. Morim, 2022

Vinicius Batista Soares, Marcos, Mathieu Koenen, Erik Jozef, Ricardo Vieira Iganci, Joao & Morim, Marli Pires, 2022, A new generic circumscription of Hydrochorea (Leguminosae, Caesalpinioideae, mimosoid clade) with an amphi-Atlantic distribution, PhytoKeys 205, pp. 401-437 : 401

4. Hydrochorea leucocalyx (Britton & Rose) Iganci, M.V.B. Soares & M.P. Morim comb. nov.

Fig. 2A

Balizia leucocalyx (Britton & Rose) Barneby & J.W. Grimes, in Mem. New York Bot. Gard. 74(1): 85. 1996.

Basionym.

Samanea leucocalyx Britton & Rose, N. Amer. Fl. 23: 34. 1928.

Type material.

Mexico. Tabasco, El Limon, J. N. Rovirosa 976 (lectotype, designated by Barneby and Grimes 1996, p. 36, as holotype, here corrected: US [US13198371] digital image!, clastotypus (fragm. + photo): NY [NY00003824] digital image!).

Distribution and habitat.

Belize, Guatemala, Honduras, Mexico. Hydrochorea leucocalyx occurs in wet tropical forests, often along riverbanks, seldom in anthropogenic pastures, up to 400 m elevation ( Barneby and Grimes 1996).

Notes.

Amongst the species of Hydrochorea , H. leucocalyx is one of the few that does not occur in Amazonia. It has affinities with the new species described in this treatment (see H. uaupensis ) and is mainly distinguished by the lomentiform indehiscent fruit (vs. the cryptoloment in H. uaupensis ). Barneby and Grimes (1996) recognised the specimen J. N. Rovirosa 976 as holotype, but in the species protologue ( Britton and Rose 1928), the authors did not indicate the herbarium where the type specimen was deposited. Thus, following Art. 9.10 of the International Code of Botanical Nomenclature ( Turland et al. 2018), the specimen J. N. Rovirosa 976 (US13198371) is here corrected to lectotype.

Selected specimens examined.

Honduras: 7 September 1932, W.S. Schipp 1024 (K) . Mexico, Chiapas: km 12 carretera Pénjamo-Chancalá, 8 June 1960, J.P. Chavelas et al. s.n. (K) .

Figures

Figure 2. The genus Hydrochorea Barneby & J. W. Grimes A The amphi-atlantic geographic distribution of Hydrochorea B Hydrochorea pedicellaris (DC.) M. V. B. Soares, Iganci & M. P. Morim foliage and fruits C Hydrochorea corymbosa (Rich.) Barneby & J. W. Grimes foliage and fruits D Hydrochorea panurensis (Spruce ex Benth.) M. V. B. Soares, M. P. Morim & Iganci foliage and fruits E Hydrochorea uaupensis M. P. Morim, Iganci & E. J. M. Koenen in habitat, with foliage and fruits F Flowers of H. uaupensis after rain G mature fruits of H. uaupensis. B, C from M. V. B Soares D from D. Cardoso E-G from J. R. V. Iganci.