Hydrochorea marginata (Spruce ex Benth.) Barneby & J.W. Grimes, Mem. New York Bot. Gard. 74(1): 29. 1996.

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

5. Hydrochorea marginata (Spruce ex Benth.) Barneby & J.W. Grimes, Mem. New York Bot. Gard. 74(1): 29. 1996.

Figs 2A, D , 6

Basionym.

Pithecellobium [as Pithecolobium ] Pithecolobium marginatum Spruce ex Benth., Trans. Linn. Soc. London 30: 586. 1875.

Type material.

Brazil, Barra, by a stream [Prov. Rio Negro], Spruce 1658 (lectotype, designated by Barneby and Grimes 1996, p. 31: K [K000528011]!; isolectotypes: E [E00313848] digital image!, F [V0058733F] digital image!], G [G275450] digital image!, P [P03094432] digital image!, P [P03094430] digital image!).

Distribution and habitat.

Brazil and Venezuela. Hydrochorea marginata occurs in Amazonia, in flooded areas and along riverbanks and lake shores.

Notes.

Barneby and Grimes (1996) considered H. marginata to comprise three varieties, H. marginata var. panurensis (Benth.) Barneby & J.W. Grimes, H. marginata var. scheryi Barneby & J.W. Grimes, and Hydrochorea marginata var. marginata . Hydrochorea marginata var. panurensis is recognized at the species level in this treatment, and H. marginata var. scheryi is placed as a synonym of H. panurensis because we identified no morphological diagnostic characters that support them as independent taxa. Both these taxonomic decisions are discussed under H. panurenis .

Selected specimens examined.

Brazil: Amazonas, Rio Negro between Moreira and Rio Arirahá, 13 October 1971, G.T. Prance 15206 (NY) .

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.

Figure 6. Hydrochorea marginata (Spruce ex Benth.) Barneby & J. W. Grimes A branch with inflorescences B-D extra-floral nectaries E peripheral flower bud F peripheral flower G terminal flower bud H terminal flower I leaflet. A-D, F, H, I from A. Carlos et al. 066 E, G from C. Ferreira et al. 7260. Illustration by Alex Pinheiro.