Flora of Barro Colorado Island

Dioclea wilsonii

Standl., Publ. Field Columbian Mus., Bot. Ser. 4:310.1929

D. violacea sensu auct. non Mart. ex Benth.

Liana; young branchlets and petioles long-pilose. Leaves trifoliolate; stipules with a produced basal lobe; petioles 4-9 cm long; leaflets elliptic, rounded or sometimes very abruptly acuminate at apex, rounded, truncate, or subcor­date at base, 7-15 cm long, 4-13 cm wide, becoming glabrous above, strigillose below. Racemes to 45 cm long; inflorescences and bracts dark ferruginous-pubescent; rachises studded with tuberculate knobs on which the flowers develop; bracts linear, erect; pedicels 4-6 mm long at anthesis; flowers purple; calyx to 1.2 cm long; standard to 3 cm long, longer than wide; stamens with 5 anthers fertile, 5 sterile. Legumes completely indehiscent, 10-14 cm long, to 5.5 cm wide and 1-1.7 cm thick,      pur­plish-pilose (dark ferruginous-pubescent when young), only slightly concave along the upper margin, not at all constricted between the seeds, obliquely sulcate, not sulcate along the lower margin; seeds plump, 3 or 4, ca 3 cm diam, brown with black mottling. Croat 6726.

Occasional, along the shore; probably less common than D. reflexa. Flowers mostly in the rainy season, espe­cially in October. The fruits are nearly full size by No­vember or December and seem to ripen by May.

Seeds of this species cannot easily be distinguished from those of D. reflexa. The species has been confused with D. violacea Mart. ex Benth., which R. Maxwell considers to be equal to                          D. paraguariensis Hassl. (pers. comm.).

Belize to Panama, the Guianas, and Brazil; Trinidad and Granada. In Panama, known only from tropical moist forest in the Canal Zone, Bocas del Toro, Herrera, Pa­nama (Perlas Islands), and Darien.

See Fig. 284.

Photos from STRI Digital Archive

  • Dioclea wilsonii Inflorescence buds
  • Dioclea wilsonii flower
  • Dioclea wilsonii Inflorescence
  • Dioclea wilsonii Inflorescence
  • Dioclea wilsonii Inflorescence
  • Dioclea wilsonii flower plant
  • Dioclea wilsonii flower plant
  • Dioclea wilsonii flower plant
  • Dioclea wilsonii fruit
  • Dioclea wilsonii immature-fruit