Senna georgica var. georgica

Title

Senna georgica var. georgica

Authors

Howard S. Irwin, Rupert C. Barneby

Scientific Name

Senna georgica H.S.Irwin & Barneby var. georgica

Description

46a. Senna georgica Irwin & Barneby var. georgica. Cassia hoffmannseggii var. gardneriana Bentham, 1870, p. 104.—. . in sylvis prope Maranhao: G. Don; ad Pernambuco: Gardner n. 990.; prope Para: Burchell; secus Rio Tocantins: Weddell; etiam in Cayenna: Rothery."—Lectoholotypus, Gardner 990 from Pernambuco, collected X.1837 (fl, fr jun), K! = NY Neg. 1447 = IPA Neg. 926; paratypi, G. Don 69, BR (hb. Mart.)! Weddell 2329, K! Rothery s.n., K! Burchell’s spm from Para (no. 9928, K!) = S. quinquangulata + fl of var. georgica probably misplaced from Burchell 9616.

Characters as given in key.—Collections: 56.

Forest margins and clearings, often in sandy ground, on terra firme, of scattered and discontinuous (known) range in Guayana, Brazil and n.-centr. Bolivia: coastal plain of French Guiana (Grand Matoury near Cayenne); lower Amazon valley in Para, downstream from mouth of Rio Tapajos, thence s. on Rio Tocantins to centr. Goias (Crixas) and on the Beni, Mamore and Guapore forks of Rio Madeira into n. and centr. Bolivia and the Paraguay divide in w.-centr. Mato Grosso; apparently disjunct in caatinga of n.-e. Brazil, from s. Ceara to e. Pernambuco and n.-e. Bahia.—Fl. VI-XI, fr. VIII-XII(-?).—Records (as Cassia hoffmannseggii) from centr. and Peruvian Amazonia and from Cuba are based on specimens of related species.

The var. georgica was first collected on the lower Amazon between 1801 and 1807 by Friedrich W. Sieber (B-WILLD 7935, sub Cassia arcuata Hoffgg., ined), and was cultivated on Mauritius as early as 1835 (Bouton, P).