Chamaecrista greggii var. potosina (Britton & Rose) H.S.Irwin & Barneby

  • 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 2: 455-918.

  • Family

    Caesalpiniaceae

  • Scientific Name

    Chamaecrista greggii var. potosina (Britton & Rose) H.S.Irwin & Barneby

  • Type

    Holotypus, so labelled, NY! isotypi, sub eodem num. ex "Buena Vista, XI. 1910," G, GH, US!—Cassia potosina (Britton & Rose) Standley, Field Mus., Bot. 22: 78. 1940.

  • Synonyms

    Chamaecrista potosina Britton & Rose, Cassia potosina (Britton & Rose) Standl.

  • Description

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    Variety Description - Lvs up to 1.2-2.3 cm; lfts commonly (l-)2, rarely 2-4 pairs, those of longer lvs oblanceolate and up to 11-17 x 2.5-5 mm; venulation as given in key. [Key: "Lfts usually 2, rarely up to 4 pairs, in any case longer, those of larger lvs up to 11-17 mm; primary vein adjacent to midrib on proximal side produced well beyond middle of lft-blade sometimes to its apex; tertiary venulation sometimes present, but fainter than in vicariant var. greggi, sharper than disjunctly allopatric var. macdougaliana; ovary of the latter the faces of the pod glabrous; local in s.-w. Tamaulipas and s.-e. San Luis Potosi."]— Collections: 9.

    Distribution and Ecology - In desert scrub on limestone or perhaps sometimes on gypsum, 620-2500 m, localized in intermontane valleys of Sa. Madre Oriental and plains w. of the crest in s.-w. Tamaulipas and e. San Luis Potosí, from Miquihuana and Jaumave s. to Río Verde.—Fl. V-XII.

  • Distribution

    Tamaulipas Mexico North America| San Luis Potosí Mexico North America|