Plantae Fabales Fabaceae Vinicius Batista SoaresMarcosMathieu KoenenErik JozefRicardo Vieira IganciJoãoMorimMarli PiresA new generic circumscription of Hydrochorea (Leguminosae, Caesalpinioideae, mimosoid clade) with an amphi-Atlantic distributionPhytoKeys2208202220540143710.3897/phytokeys.205.82775 77D73681-6358-51F0-A90A-DEB01B38B288 Hydrochorea leucocalyx urn:lsid:ipni.org:names:77303828-1 (Britton & Rose) Iganci, M.V.B. Soares & M.P. Morimcomb. nov.Fig. 2A Balizia leucocalyx (Britton & Rose) Barneby & J.W. Grimes, in Mem. New York Bot. Gard. 74(1): 85. 1996.Basionym.

Samanealeucocalyx 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. Hydrochorealeucocalyx 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).

10.3897/phytokeys.205.82775.figure2F621E15B-F691-50E8-809E-FE761DB01574

The genus Hydrochorea Barneby & J.W. Grimes A The amphi-atlantic geographic distribution of HydrochoreaBHydrochoreapedicellaris (DC.) M.V.B. Soares, Iganci & M.P. Morim foliage and fruits CHydrochoreacorymbosa (Rich.) Barneby & J.W. Grimes foliage and fruits DHydrochoreapanurensis (Spruce ex Benth.) M.V.B. Soares, M.P. Morim & Iganci foliage and fruits EHydrochoreauaupensis 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.

https://binary.pensoft.net/fig/733494BarnebyRCGrimesJ (1996) Silk tree, guanacaste, monkey’s earring: A generic system of the synandrous Mimosaceae of the Americas. Part I. Abarema, Albizia, and allies. Memoirs of the New York Botanical Garden 74(1).BrittonNLRoseJN (1928) North American Flora, Volume. 23. The Bronx: New York Botanical Garden, 34.TurlandNJWiersemaJHBarrieFRGreuterWHawksworthDLHerendeenPSKnappSKusberWHLiD-ZMarholdKMayTWMcNeillJMonroAMPradoJPriceMJSmithGF [Eds] (2018) International Code of Nomenclature for algae, fungi, and plants (ShenzhenCode) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Koeltz Botanical Books, Glasshütten. https://doi.org/10.12705/Code.2018