Abarema racemiflora (Donn.Sm.) 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
"In silvis collinis ad Las Vueltas, Tucurrique, Comarea [comarca] de Puntarenas [9°51'N, 83°42'W, in prov. Cartago], Costa Rica, alt. 600-750 m, Febr. 1899, A. Tonduz n. 13060." — Holotypus, US 942404!, isotypi, F!, G (11 sheets)!, GH (2 sheets)!, NY (3 s
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Description
Species Description - Macrophyllidious trees flowering when 6-7 m but attaining 27 m with trunk 4 dm dbh, the innovating branchlets and foliage densely brown-puberulent- tomentulose but adult stems and lvs glabrous, the ample chartaceous bright green lfts subconcolorous, the inflorescence composed of very long, laxly many- fld racemes arising in the axil of coeval lvs, paired with but distal to an axillary bud. Stipules 0. Lf- formula i-ii/2-3, the lfts 12-20 per lf; lf-stks (l-)2-5.5cm, the petiole (l-)2-3.7 cm, the one interpetiolar segment, when present, 1.5-2 cm; petiolar nectaries poorly developed, the first one forming a shallow cup <1.5 mm diam at tip of lf-stk or between proximal pair of pinnae, sometimes obsolete or immersed, the interfoliolar nectaries similar but smaller, often obscure; rachis of pinnae 4-10.5 cm, the longer interfoliolar segments (1.5-)2-3.5 cm; lft-pulvinules 2.5-5 x 1-1.5 mm; lfts strongly accrescent distally, elliptic-acuminate from equilateral or slightly asymmetrical, cuneate base, the acumen obtuse muticous, the blade of furthest pair (7-)10-15.5 x (3-)3.5-5.5 cm, 2.3-2.8 times as long as wide, the centric, straight or very slightly forwardly incurved midrib immersed above, cariniform beneath, giving rise to ±5-8 pairs of major secondary veins incurved-ascending to anastomosis close within the plane margin and many minor, more widely divergent secondary ones, all these and an intricate reticulum of veinlets prominulous on both faces. Peduncle and raceme-axis together 2-3.5 dm, much surpassing the foliage; the raceme remotely ±55—95-fld, the fls homomorphic, widely ascending or subhorizontal; bracts subulate 0.4-0.7 mm, dry and caducous long before anthesis; pedicels straight 3-6.5 x 0.3-0.4 mm, dilated at base; perianth 5-merous, thinly puberulent externally, a little more densely so on lobes; calyx deeply narrowly campanulate 3.2-4.5 x 1.2-1.5 mm, weakly 5-nerved, the ovate-mucronulate, unequally divided teeth 0.3-0.8 mm; corolla whitish, tubular, 7 mm, the almost erect, narrowly lanceolate lobes 2-2.7 x 0.7-1 mm; androecium 32-36-merous, 14—15 mm, the stemonozone ±1.5-2 mm, the tube 6-6.5 mm; ovary glabrous, obliquely conical at apex; style about as long as filaments, at apex dilated into a funnel-shaped stigma 0.15 mm diam. Pods few per spike, subsessile, in profile undulately broad-linear evenly recurved through at least one circle, 15 x 1.4 (!, described as 15-19 x 0.7-1.3 in.) cm, 5-8-seeded, the sutures scarcely thicker than the valves, these coriaceous, low-convex over seeds, externally pale brown, faintly deeper-mottled, dull and papillate, within smooth, dull-ochraceous between seeds and lustrous castaneous in the seed-cavities, the exocarp very thin, resinous mesocarp 0, crustaceous endocarp 0.4-0.5 mm thick in section; dehiscence of Abarema; funicle ribbonlike, coiled; seeds obovoid, moderately compressed, in broad view ±10 x 6.5 mm, the hard, when old fuscous (fresh could be blue), coarsely wrinkled embryo loosely invested by a grapeskin-like translucent testa, pleurogram 0; no endosperm.
Distribution and Ecology - On wooded hills near 700-900 m, known only from the vicinity of Turrialba in the province of Cartago (E of Turrialba, Tucurrique) and at 10°15'N, 84°22/W in prov. Alajuela (Villa Quesada), Costa Rica. — Map 18.
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Common Names
chaperno
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Distribution
Cartago Costa Rica Central America| Alajuela Costa Rica Central America|