Rinorea multivenosa Hekking

Authority

Hekking, W. H. A. 1988. violaceae Part l—Rinorea and Rinoreocarpus. Fl. Neotrop. Monogr. 46: i-ii, 1-208. (Published by NYBG Press)

Family

Violaceae

Scientific Name

Rinorea multivenosa Hekking

Type

Type. Brazil. Amazonas: Várzea at Sepatini, Rio Purus, Upper Amazon and tributaries, 30 Sep 1874 (fl), Traill 22 (holotype, K; isotype, P).

Description

Species Description - Tree 2-3 m tall. Branchlets sparsely and minutely pilosulous when young, glabrescent when older. Leaves alternate; petioles 5-9 mm long, sparsely pilosulous when young, glabrescent when older; stipules deciduous, narrowly ovate to deltoid, subacute, 4-5 x 0.25-1.75 mm, herbaceous, sparsely pilosulous, richly veined, ciliolate; lamina elliptic to ovate, acuminate, 8-20.5 x 4.5-10.5 cm, papery to herbaceous, glabrous on both sides; lateral veins 15-19 pairs (acumen excluded); tertiary venation ± scalariform; base cuneate to rounded, obtuse at the petiole; margin (sub)serrate, mucronulate; acumen 0.5-1.5 cm long, apex subacute, mucronulate. Inflorescences axillary, lateral and subterminal, 1-2 fasciculate, pseudoracemose, 5-13 x 1-2 cm, laxiflorous near the base; central axis hirtellous; cymules 1-3 (-5?) flowered; common peduncle 1-2.5 mm long, hirtellous; pedicels 2.5-2.75 mm long, articulate near the middle, hirtellous; bracts and bractlets ovate to deltoid, acuminate, herbaceous, hirtellous, costate, ciliolate, subacute; bracts 0.75-1 x 0.5-0.6 mm; bractlets subopposite to alternate, 0.5-0.75 x 0.3-0.6 mm. Flower buds ovoid, conical, (sub)obtuse. Flowers white. Sepals subequal, ovate to deltoid, 1.252 x 0.5-1 mm, herbaceous, hirtellous, costate or 3-5 veined, ciliolate, (sub)acute. Petals narrowly ovate, acuminate, 5-5.25 x 1.25-1.5 mm, herbaceous, outer petals subcordate at the base, base of outer and inner petals carnose, minutely pilosulous outside, densely villose inside, glabrous along the margin, apex subobtuse, pilosulous. Stamens ca. 4 mm long; filaments (nearly) completely free, 0.25-0.75 x 0.2-0.4 mm, villose near the anthers; basal part fused to a minute tube, 0.1 mm high; dorsal glands free, erect, conical, 0.2-0.4 mm long and wide, callose, pilosulous to glabrescent; anthers ovoid, 1.25-1.5 x ca. 0.75 mm, apex subacute, unappendaged; connective outside narrowly ovate to deltoid, (sub)acute, 1-1.25 x ca. 0.25 mm, whitish villose; connective inside, linear, 1-1.25 x ca. 0.1 mm, sometimes pilose near the base; connective scales apical as well as lateral, narrowly ovate to deltoid, acuminate, ca. 3.5 x ca. 1 mm, scarious, orange-brown, margin suberose near the base, apex subacute and subentire. Ovary subglobose 1.25-1.5 x 1-1.25 mm, greenish-white when fresh, golden villose; ovules one per placenta. Style filiform, sigmoid at the base, 3-3.25 mm long, whitish when fresh, glabrous or sparsely appressed pilosulous, exceeding the stamens by ca. 0.6 mm; stigma apiculate, subacute. Capsule ± symmetric, orbicular to ovoid, acuminate, subtended by subpersistent floral parts, coriaceous to subligneous, greenish when fresh, sparsely pilose to glabrescent, apex subobtuse to subacute; valves three, subequal, 8.5-9.5 x 3-4 mm. Seeds one per valve, globose, ca. 4.5 mm in diam., glabrous.

Discussion

Sepals, petals, stamens and style, subpersistent at the base of (juvenile) fruits, give additional flower characters to fruiting specimens. Fruits of Rinorea multivenosa are sparsely pilose to glabrescent (versus juvenile fruits of R. longistipulata densely pilose).

Distribution

Flowering specimens have been collected in September and October and the only fruiting specimen in January. SW Amazonia of Brazil and SE Colombia between the rivers Amazonas and Madeira near Tefé and Olivença; occurring in periodically inundated areas. An additional specimen recorded from Rio de Janeiro (Traill s.n. in herb. Glaziou) was probably cultivated there.

Colombia South America| Amazonas Colombia South America| Brazil South America| Amazonas Brazil South America| Rio de Janeiro Brazil South America|