Zygia rubiginosa L.Rico

  • Authors

    Rupert C. Barneby

  • 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

  • Scientific Name

    Zygia rubiginosa L.Rico

  • Type

    "COSTA RICA. Provincia Puntarenas, Q. Jiménez & B. Jaén 680 . . . Osa, Reserva Forestal, Golfo Dulce, Alto Los Mogos, Camino Rincón de Osa, 8°47'N 83°35'25"W, 28 March 1989." — Holotypus, CR n.v.; isotypus, K (not available in 1994).

  • Description

    Species Description - Trees attaining 10 m with smooth trunk ±2 dm dbh, the young branchlets and lf-axes ferruginous- pubescent but glabrescent, the fragrant cauliflorous inflorescences pendulous spiciform. Stipules lanceolate, to 2 x 1 mm, striate glabrous. Lf-formula i/2½-3½; petiole 3-12 mm, charged at apex with a circular nectary 1 mm diam; rachis of pinnae 3-7 cm; petiolules <2 mm; lfts broadly elliptic-acuminate from slightly inequilateral base, 2.5-7 x 1.3-3.3 cm, the chartaceous blades subundulate marginally, puberulent on main veins above. Inflorescence-axis to 11 cm; bracts deltate ±0.5 mm, persistent; perianth thinly puberulent, the cupuliform calyx 1-1.3 x 1 mm, subtruncate, the white corolla subtubular 5-5.5 mm, ribbed lengthwise; androecium ±30-merous, 10 mm, the tube 6.5 mm, the tassel white, the intrastaminal nectary ±0.5 mm; ovary glabrous, sessile 1.2-2 mm, the style 1.5-2.5 mm. Pods in profile 9-13 x 0.6-0.8 cm, slightly curved, laterally compressed and 0.55 mm thick, ±8-seeded, the thinly papery valves brownish smooth glabrous; seeds 11 x 5.5 x 4 mm, the testa papery brownish, without pleurogram.

    Distribution and Ecology - In lowland mixed evergreen forest near 100 m, said to be very rare, known only from the region of Golfo Dulce in Puntarenas province, Costa Rica. — Not mapped. — Fl. Ill; fr. VI.

  • Distribution

    Puntarenas Costa Rica Central America|