Abarema centiflora Barneby & J.W.Grimes
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Authors
Rupert C. Barneby
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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.
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Family
Mimosaceae
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Scientific Name
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Type
BOLIVIA. Depto Cochambamba, prov. Chapare: El Limbo, 200 m, 25 Nov 1966 (fl), Roy F. Steinbach 538. — Holotypus, NY; isotypi, F 1645245, GH, MICH, US 2533435.
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Description
Species Description - Macrophyllidious trees 8 m, with longitudinally furrowed branchlets, except for lf-faces minutely sordid-puberulent throughout and the indumentum extending upward along the primary lf-veins, the foliage bright green subconcolorous, the relatively dense spiciform racemes of small greenish, white- stamened fls arising solitary in the axil of few coeval lvs, paired with and distal to an inhibited branch-bud. Stipules apparently 0 (no scars). Lf-formula i/(2—)4— 5; lf-stks 2-6.5 cm; lf-nectaries at tip of lf-stk and at insertion of lfts plane round ±1-1.5 mm diam, flush with or almost embedded in epidermis; rachis of pinnae to 13-15 cm, the longer interpinnal segments 2.5-3 cm; lft-pulvinules in dorsal view 3.5—4 x 1-1.5 mm; lfts moderately accrescent distally, the blades ovate-short-acuminate from cuneate-flabellate base, the larger ones ±6.5-9 x 3-3.5 cm; the subcentric midrib either straight or gently curved forward toward lft-apex, giving rise to 5-7 pairs of major, incurved-ascending secondary veins brochidodrome well within the nearly plane margin and to many minor intercalary, widely divergent ones, all these together with connecting tertiary and reticular venules prominulous on both faces. Peduncles 1.5-4 cm; racemes ±80-100-fid, the axis ±7-9 cm; bracts minute, shed long before anthesis; pedicels subhorizontal, the lowest ±1 x 0.6 mm, the distal ones progressively a little shorter; perianth 5-merous, finely minutely puberulent externally; calyx deeply campanulate ±2.6 x 1.6 m, the low-deltate obtuse teeth 0.3-0.5 mm; corolla 4.8 mm, the lance-ovate, nearly erect lobes 1.6x1 mm; androecium 32-merous, 11 mm long, the stemonozone scarcely 1 mm long, the tube 4.5 mm (nearly as long as corolla); ovary glabrous, obliquely conical at apex; style a little shorter than longest stamens, the stigma scarcely dilated, a little more than 0.1 mm diam. Pods unknown.
Distribution and Ecology - In humid montane woodland near 2200 m, known only from the E slope of the Bolivian Andes near 17°S in prov. Chapare of dept. Cochabamba. — Map 24A. — Fl. XI-XII.
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Discussion
Abarema centiflora, the southernmost known species with long-spicate inflorescences, appears fully distinct from its Colombian and Ecuadoran relatives either in leaf-formula or in racemose (not spiciform) units of inflorescence, or in both, but it is known as yet only from the flowering type collection and will require reassessment when the fruit is secured.
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Distribution
Cochabamba Bolivia South America|