Senna versicolor var. heterosperma

Title

Senna versicolor var. heterosperma

Authors

Howard S. Irwin, Rupert C. Barneby

Scientific Name

Senna versicolor var. heterosperma H.S.Irwin & Barneby

Description

95b. Senna versicolor (Vogel) Irwin & Barneby var. heterosperma Irwin & Barneby, var. nov., a var. versicolori ovulis magis numerosis 24-28 (nec 10-18) seminibusque parvis 4.5-5 (nec 5.5-8) mm longis in loculis bre- vioribus 2-3 (nec 4.5-7) mm longis confertis abstans.—PERU. Cajamarca, prov. Celendin: canyon of Rio Maranon above Balsas, 5 km below summit of road to Celendin: 24. V. 1964 (fl, fr), P. C. Hutchinson & J. K. Wright 5306.—Holotypus, NY; isotypi, GH, K, US.

Characters as given in key; style perhaps longer than that of var. versicolor, 2-3.5 (not 1-2) mm.—Collections: 3.

Open and brushy or partially wooded canyon slopes near 2900-3000 m, known only from the valley of Rio Maranon in s.-e. Cajamarca and perhaps adjoining s. Amazonas, Peru.—Fl. III-VIII.

A handsome shrub, introduced to cultivation by way of seeds of the type- collections, grown for ornament in California (A. Griffiths 5651) and under glass in New York. It is the C. latopetiolata of Isely, 1975, p. 105.