Zygia inundata (Ducke) H.C.Lima ex Barneby & J.W.Grimes
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Authors
Rupert C. Barneby
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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
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Scientific Name
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Type
"Habitat in ripis inundatis lacus Jeretepaua prope Obidos 13-8-1916, n. 16.340, l[egit] A. Ducke; in insula Cutijuba prope Belém do Pará 29-6-1907, l[egit] J. Huber, n. 8.224; ad rivulos fluvii Amazonum affluentes prope Gurupá frequens l[egit] A. Ducke 25
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Synonyms
Pithecellobium inundatum (Ducke) Ducke
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Description
Species Description - Slender trees attaining 8 m, with fuscous, sometimes flaking new branchlets and smooth gray older ones, except for minutely puberulent perianth and nascent foliage glabrous throughout, the lvs simply paripinnate, almost all amply 4-foliolate, the umbelliform capitula of narrow subtubular fls arising either directly and solitary, or pseudoracemosely, from knots on defoliate branches, or singly from random lf-axils. Stipules small, caducous. Lf-stks ±5-9.5 cm, the petiole and one interfoliolar segment subequilong; between each pair of lfts a low-convex fuscous nectary ±1 mm diam; lft-pulvinules 3.5-6.5 mm, shallowly grooved ventrally; lfts subequilaterally elliptic or ovate-elliptic from cuneately attenuate base, shortly acuminate at apex, the blades of distal pairs 6.5-18 x 2-7 cm, 2.2-3.6 times as long as wide, the proximal pair somewhat smaller; venation pinnate, the subcentric midrib nearly straight, the 8-11 pairs of stronger secondary nerves incurved-ascending, either weakly brochidodrome or expiring shortly within the plane margin, the tertiary venulation weak and faint, immersed or almost so on upper face. Primary axes of inflorescence 0-2 cm, the peduncles either fasciculate on old wood or solitary and simply bracteate when pseudoracemose, ±1.5-4.5 cm; capitula umbelliform, the subglobose receptacle ±2 mm diam, to ±20-25-fld; pedicels 0.8-2.5 mm; perianth thinly microstrigulose; calyx 1.6—2 mm, minutely denticulate; corolla 9—12 mm, only slightly dilated distally, the erect lobes ±0.6-1 mm; androecium 34—48-merous, ±16-20 mm, the tube 12-14 mm, the filaments free 4—10 mm, the intrastaminal disc 0.4-0.5 mm; ovary glabrous, tapering at apex. Pods sessile, in broad profile oblong ±12-14 x 3.3-4.3 cm, 7-10-seeded, very slightly decurved, compressed but low-biconvex, bluntly bicarinate by 2-ribbed sutures ±3 mm wide, the stiffly coriaceous lignescent valves becoming dark brown, smooth or almost so, microscopically puberulent or glabrate; dehiscence through the narrowly gaping sutures; seeds transverse, narrowly imbricate along the continuous cavity, lentiform but thickened, in broad view ±2.7-3.5 cm diam, 5-9 mm thick, the testa brown, papery fragile, the embryo homy nigrescent.
Distribution and Ecology - In varzea along streams and riverbanks or lake shores below 10 m, locally plentiful along the lower Amazon valley and delta islands in Pará downstream from the mouths of Rios Trombetas and Tapajós (long. 48°-55°30'W) and S Amapá, Brazil; on lower Approuague River near 14° 15' N in French Guiana; reported by Ducke (1949: 39) from upper Río Negro in state of Amazonas. — Not mapped. — Fl. VI-VIII(-?).
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Distribution
Amazonas Brazil South America| French Guiana South America|