Zygia garcia-barrigae (C.Barbosa) 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
"COLOMBIA, Cundinamarca, La Vega, camino a Nocaima... 27 Ene 1942, H. García- B. 10647." - Holotypus, COL!; isotypus, "US," not available for study in the course of this revision.
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Synonyms
Pithecellobium latifolium (L.) Benth.
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Description
Species Description - Macrophyllidious trees ±4 m, with stout terete gray branches, except for minutely brownish-puberulent inflorescence and fruit glabrous throughout, the ample, thinly chartaceous lfts dull brown-olivaceous above, paler dull beneath, the capituliform units of inflorescence arising singly from knots either axillary to mature homotinous lvs or at nodes of defoliate branches, the fruits cauline. Stipules broadly lance-elliptic acute, the larger ones attaining 14-20 x 7-8 mm, ±9-11-nerved dorsally, becoming papery pallid, fragile and tattered but not disarticulating. Lf-formula i/5; petiole ±10x4 mm, charged at apex with an (imperfectly observed) nectary; rachis of pinnae to 12 cm and probably longer, charged ventrally between each pair of lfts with a sessile disciform nectary ±2.5 mm diam, the interfoliolar segments to 5.5-7 cm; lft-pulvinules ±6-8 x 2.5-3 mm, deeply fissured transversally when dry; lfts accrescent distally, the blades obovate-elliptic from inequilaterally cuneate base, shortly acuminate, those of distal pair attaining 17 x 6.5 cm (probably more); midrib subcentric, almost straight, pinnately ±6-7-branched on each side, the first posterior secondary nerve shorter than the second one, this incurved-ascending to or somewhat beyond midblade, these all sharply prominulous on lower face of blade, the tertiary and reticular venules progressively fainter. Peduncles ±15-17 mm; capitula ±5-10-fld, the receptacle in fruit 2-3.5 mm; bracts ovate acute ±1 mm persistent; fls (1 seen, dry, incomplete) sessile, the perianth 4-merous, the corolla obtusely striate, the calyx faintly 4-nerved, both minutely puberulent overall; calyx campanulate ±2 x 1.5 mm, the teeth 0.3 mm (one sinus more deeply split in age); corolla ±6.5 mm, the lobes ±2 mm; androecium ("34"-merous, ex char.) and gynoecium not seen. Pods in broad view subundulately linear 7.5-8.5 x 1-1.1 cm, nearly straight, 9-10-seeded, when ripe turgidly biconvex, the stiffly coriaceous valves composed of black exocarp ±0.6 mm and pallid crustaceous endocarp ±0.15 mm thick in section, faintly rugulose, brown-gold-puberulent overall; dehiscence not seen; seeds plumply discoid, in broad view 8.5 x 7.5 mm, the papery, dull brown testa wrinkled, narrowly winged peripherally, lacking pleurogram.
Distribution and Ecology - In unrecorded habitat but to be expected in riparian woodland, known only from the type, collected between 950 and 1200 m on the W slope of Cordillera Oriental, near 5°rN, 74°21'W, in Cundinamarca, Colombia. — Not mapped. — In ripe fr. late I.
Relationships - Except for weaker and shorter posterior vein of leaflets, the foliage of Z. garcia-barrigae certainly resembles that of Z. latifolia. The syndrome of dilated papery stipules, unique in the genus, narrow tumid pod, relatively small seeds, and submontane Andean habitat is so different as to entitle subsp. garcia- barrigae to specific status.
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Distribution
Cundinamarca Colombia South America|