Monographs Details: Albizia subdimidiata var. minor Barneby & J.W.Grimes
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. & Grimes, James W. 1996. Silk tree, guanacaste, monkey's earring: a generic system for the synandrous Mimosaceae of the Americas. Part I. Abarema, Albizia, and allies. Mem. New York Bot. Gard. 74: 1-292.
Description:Latin Diagnosis - a var. subdimidiata foliis deminutis, petiolo communi 1.5-5 (nec 6-20) cm usque, petiolo vero vix 3 (nec 3-7) cm, pinnarum (2-3-jugarum) longiorum rachi 3-5.5 (nec 5-11) cm, foliolisque usque 11-14 (nec 16-29) mm longis diversa.
Variety Description - Trees 5-8 m; other characters of the species, except as modified in key and protologue. [Key] "Lvs smaller in all parts, the longer lf-stks 1.5-5 cm, the petiole 1.5-3.2 cm x 0.7-0.9 mm, the rachis of longer pinnae 3-5.5 cm, the longer interfoliolar segments 3-6 mm; larger lfts 11-14 x 3-5 mm;"
Distribution and Ecology - In seasonally flooded savanna and at forest margins or on stream banks, 100-450 m, apparently localized on the upper Río Branco in N state of Roraima, Brazil (Maracá), and in the middle and upper Essequibo basin in W-centr and SW Guyana. -Map 61. — Fl. IX-X(-?).
Discussion:The typus of var. minor was referred by Sandwith to Pithecolobium multiflorum (sensu Bentham), and in isolation might pass for an incidental small-leaved form of it. But three further collections from the same general region confirm that there is something more to var. minor than fortuitous dwarfing of the foliage.
Roraima Brazil South America
| Guyana South America