Cojoba arborea var. angustifolia (Rusby) Barneby & J.W.Grimes

  • Authority

    Barneby, Rupert C. & Grimes, James W. 1997. Silk tree, guanacaste, monkey's earring: A generic system for the synandrous Mimosaceae of the Americas. Part II. , , and . Mem. New York Bot. Gard. 74: 1-149.

  • Family

    Mimosaceae

  • Scientific Name

    Cojoba arborea var. angustifolia (Rusby) Barneby & J.W.Grimes

  • Type

    "[Bolivia.] Vic. Guanai, 1892 ([M. Bang]) 16060." --- Holotypus, NY!. ---- Pithecolobium augustifolium (Rusby) Rusby, Mem. New York Bot. Gard. 7: 253. 1927.

  • Description

    Variety Description - At maturity 8-15 dm tall; If-formula labile, overlapping in number those of vars. arborea and cubensis, the longer If-stks 5-12(117) cm, with interpinnal segments to 1.2-2.7 cm, but the lfts finely sharply venulose on lower face; If-formula as given in key to varieties; larger lfts mostly 12-21 x 2.504 mm, 4-5.6 times as long as wide; pod 9-16 x 0.8-1.1 mm, 10-12-seeded, the seeds 8-10 x 6-7 mm, often but not consistently separated by elongate isthmi.

    Distribution and Ecology - In semitropical semideciduous woodland, surviving disturbance, and in savanna-rain forest ecotone, 400-1400 m, locally plentiful along and near the Andean piedmont in Bolivia, at lat. 14 30-19 S; planted as a street tree in the city of STa Cruz. --- Map 14. --- Fl. XII-III, and intermittently later, the fls and fts often coeval.

  • Discussion

    The var. angustifolium is highly variable in leaf formula, the foliage sometimes (as in the type) suggesting var. arborea, but more often var. cubensis. It has the long filament-tube of var. arborea, but the relatively few leaflets of var. cubensis. In most specimens the seeds, of a size with var. cubensis, are separated by linear isthmi, but this character is not diagnostic. The var. angustifolia seems to differ from each of the two varieties recognized above principally in the prominulous pinnate and tertiary reticulation of the leaflets and by its disjunct range of dispersal.

  • Distribution

    Santa Cruz Bolivia South America| Bolivia South America|