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

  • Authors

    Howard S. Irwin, Rupert C. Barneby

  • Authority

    Irwin, Howard S. & Barneby, Rupert C. 1982. The American Cassiinae. A synoptical revision of Leguminosae tribe Cassieae subtrib Cassiinae in the New World. Mem. New York Bot. Gard. 35, part 1: 1-454.

  • Family

    Caesalpiniaceae

  • Scientific Name

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

  • Type

    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. g

  • Synonyms

    Cassia hoffmannseggii var. gardneriana Benth.

  • Description

    Variety Description - Characters as given in key. [Key: "Hornotinous branchlets and lower face of lfts minutely strigulose with appressed hairs up to 0.05-0.15 mm; widespread in Amazonian and e. Brazil, ascending Rios Beni and Mamore to ±550 m in n.-e. Bolivia (Pando, Beni, Santa Cruz)."]—Collections: 56.

    Distribution and Ecology - 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.

  • Discussion

    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).

  • Distribution

    Cayenne French Guiana South America| Pará Brazil South America| Goiás Brazil South America| Mato Grosso Brazil South America| Ceará Brazil South America| Pernambuco Brazil South America|