Hydrochorea pedicellaris (DC.) M.V.B. Soares, Iganci & 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

8. Hydrochorea pedicellaris (DC.) M.V.B. Soares, Iganci & M.P. Morim comb. nov.

Figs 2A, B , 3F-I

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

Albizia pedicellaris (DC.) L. Rico, in Novon 9(4): 555. 1999.

Basionym.

Inga pedicellaris DC., Prodr. 2: 441. 1825.

Type material.

French Guiana, "...in Cayenna" (lectotype, designated by Barneby and Grimes 1996, p. 36, as holotype, here corrected: G-DC = F Neg. 6972, digital image!).

Distribution and habitat.

Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela. Hydrochorea pedicellaris occurs in non-inundated primary rainforest in Amazonia, in the lowlands of the Atlantic Rainforest, and in gallery forests, up to 200 m elevation, and occasionally at 700-800 m elevation in Bolivia, Ecuador and eastern Brazil ( Barneby and Grimes 1996).

Notes.

Hydrochorea pedicellaris is the only species of the genus that occurs in a range of environments including areas of the Brazilian Atlantic Forest. It has an affinity with H. elegans (see comment under that species), but when it is in fruit it is easily recognized by its follicular dehiscence, and an exocarp with deep, transversal fissures. Barneby and Grimes (1996) recognised a specimen in the G-DC herbarium as holotype, but in the species protologue ( De Candolle 1825), the author did not indicate a type specimen. Thus, the specimen at G-DC should be considered a lectotype, here corrected (Art. 9.10; Turland et al. 2018).

Selected specimens examined.

Bolivia, La Paz: Province of Larecaja, Tuiri , 12 September 1989, B. Krukoff 10886 (K) . Brazil, Amazonas: São Gabriel da Cachoeira, Rio Içana, na comunidade Camarão, terra firme, 0°37'23"N, 67°26'57"W, 20 July 2012, Iganci, J.R.V, Morim, M.P., Bonadeu F., Koenen, E. 870 (RB); Espírito Santo: Linhares Fragmento em frente a casa do Reis, Sítio Santo Domingo, Restinga arbórea de cordões arenosos, 19°21'6"S, 39°43'31"W, 13 March 2007, R.D. Ribeiro et al. 812 (RB) . Guyana: Territorio Federal Delta Amacuro , 29 May 1964, L.M. Berti 225 (K) . Peru: Palcazú, Pasco Oxapampa, localidad Mayro , 20 May 2010, R. Vásquez et al. 36546 (K) . Suriname: Zenderij , November 1944, M. Koeleroe 237 (RB) . Venezuela: Altiplanicie de Nuria , 15 July 1960, J.A. Steyermark 86335 (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.

Figure 3. The genus Hydrochorea Barneby & J. W. Grimes (continued). Species from the Americas A flowering branch of Hydrochorea corymbosa (Rich.) Barneby & J. W. Grimes B close-up of inflorescence of H. corymbosa C discolorous leaves of H. corymbosa D close-up of inflorescence of Hydrochorea panurensis (Spruce ex Benth.) M. V. B. Soares, M. P. Morim & Iganci E unripe lomentiform pod of H. panurensis F close-up of inflorescence of Hydrochorea pedicellaris (DC.) M. V. B. Soares, Iganci & M. P. Morim, with a few peripheral flowers removed to expose sessile terminal flowers G unripe pods of H. pedicellaris H dehisced follicular pods of H. pedicellaris showing papery septate endocarp I detail of primary rachis of H. pedicellaris showing interpinnal extra-floral nectaries J inflorescence of Hydrochorea uaupensis M. P. Morim, Iganci & E. J. M. Koenen showing large sessile central flower and pedicellate peripheral flowers K unripe crypto-lomentiform pod and seed enveloped by septate endocarp of H. uaupensis; African species L inflorescence of Hydrochorea obliquifoliolata (De Wild.) E. J. M. Koenen M pinnae of Hydrochorea rhombifolia (Benth.) E. J. M. Koenen showing rhombic leaflets. A-E, J, K Erik Koenen F-I Colin Hughes L Jan Wieringa M William Hawthorne. Vouchers A-C J. R. V. Iganci 862 D, E M. P. Morim 563 F-I L. P. Queiroz 15529 J, K M. P. Morim 577 L J. J. Wieringa 6519 M unvouchered.