Zygia pithecolobioides (Kuntze) 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
"Concepción de Paraguay." — Holotypus Kuntze, s.n. collected at Concepción in September, 1892, NY (hb. Kuntze., 2 sheets)!; isotypus, †B.
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Synonyms
Feuilleea pithecolobioides Kuntze, Inga pithecolobioides Harms, Pithecolobium pithecolobioides (Harms) Hassl., Pithecellobium pithecolobioides var. reductum (Malme) Hassl.
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Description
Species Description - Macrophyllidious, subdeciduous, arborescent shrubs 2-6 (fide Kunth, to 12) m with pallid, stiffly flexuous branches and bifoliolate lvs, the young stems, lf-stks and peduncles softly sordid-pilosulous, the mature foliage glabrous except for sometimes puberulent midrib of epiphyllum, the chartaceous lfts dull brown-olivaceous when dry, a little paler beneath, the capitula of white, pink- or purple-stamened fls arising singly from terminal branchlets associated with coeval lvs. Stipules deltate 0.5-1.8 mm, becoming indurated, persistent. Lf-formula i/½; petiole including discolored but otherwise undifferentiated pulvinus 1.5-4 mm; nectary at tip of petiole sessile, almost plane, round 0.5-0.9 mm diam, no nectary on pinnae; pinna-rachis including pulvinus 0.5-1.5(-"4") mm; lft-blades obovate or elliptic-obovate from inequilaterally obtuse base, the larger ones 2.5-6(-"8.5") x 1.2-2.5(-"4") cm; venation pinnate, the straight subcentric midrib giving rise on each side to ±5-7 incurved-ascending and brochidodromous secondary nerves and these to tertiary venules weakly prominulous on both faces. Peduncles solitary 6-11 (-"20") mm; capitula ±8—14-fld, the fls sessile, the receptacle ±2 mm; bracts ±0.5 mm, persistent; perianth glabrous except for minutely puberulent orifice of calyx and tip of corolla-lobes, the calyx indistinctly 5-nerved, the corolla-tube weakly striate; calyx campanulate ±1.3-1.6(-"3") mm, the teeth 0.15-0.4 mm; corolla slightly enlarged upward 7-8.5(-"10") mm, the lobes ±2 mm; androecium 30-42-merous, ("13"-) 19-23 mm, the tube 9-11 mm, exserted ±2 mm; nectarial disc 0.3-0.4 mm; ovary glabrous. Pods sessile, in profile lunately oblong 4—5.7 x 1.3-2(-"3") cm, obtuse at apex, at base semicordately produced backward from pedicel, ±8-seeded, the sutures not dilated, the ripe valves dry, crustaceous, glabrous; fully formed seeds not seen.
Distribution and Ecology - In brush-woodland subject to flooding in the wet season, below 250 m, endemic to the middle Paraguai valley in lat. 20°-28°S, from Mato Grosso do Sul (mun. Miranda) in Brazil S through centr. Paraguay to extreme N Argentina (E Chaco and northernmost Corrientes). — Map 38. — Fl. V, IX, the full season not established.
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Common Names
granadillo de río
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Distribution
Mato Grosso do Sul Brazil South America| Paraguay South America| Chaco Argentina South America| Corrientes Argentina South America|