Monographs Details: Rhodostemonodaphne sordida Madriñán
Description:Latin Diagnosis - Rhodostemonodaphne morii nisi tepalis expansis et re-flexis similis.
Species Description - Trees: branches basitonic, in axils of cataphylls, pseudo-verticillate; twigs terete, 3 mm diam.; epidermis black; terminal bud plump, 4 x 3 mm; cataphylls caducous; indument puberulous to tomentose, caducous after one flush, the hairs dense to sparse, to 1 mm long, straight to crisped, erect, yellowish to reddish. Leaves: petioles slender to robust, 0.5-1.2 cm x 2-3 mm, terete; blades chartaceous, flat, elliptic, 5-12 x 4-6 cm; base rounded to obtuse, 90-150°; apex rounded to acute, 60-100°, acuminate for up to 2.5 cm; margin plane; primary vein above raised, below prominent; secondary veins 4-6 pairs, equidistant, brochidodromous, above flat, below raised, diverging at 60°, evenly arching, chordal angle 30°, the angle uniform along blade length; tertiary veins above inconspicuous, below slightly raised, random-reticulate; higher-order veins above inconspicuous, below slightly raised; surface above light to dark brown (mottled), below dark brown; indument above absent, the primary vein tomentose, below puberulous, the hairs sparse, to 1 mm long, straight to curved, erect, yellowish brown, denser on the veins, caducous after one flush. Staminate inflorescences: acrotonic, erect, peduncles 4-8 cm long, the hypo-podia 1.5-5 cm X 1-1.5 mm, branch orders 6, the second-order branches 2-8, dispersed to clustered apically, lowest branch to 0.6-2 cm long, color and indument of all axes as on twigs; bracts and bracteoles caducous (not seen). Staminate flowers: pedicels 1.2 x 0.4 mm, the diameter even throughout; receptacle obconical to flat, ca. 1 x 1.5 mm; tepals chartaceous, ovate, ca. 1 x 1.2 mm, at anthesis recurved, yellowish brown, adaxially puberulous; stamens of whorls 1 and II capitate, the anthers oblong, ca. 0.8 X 0.5 mm, with a few hairs at base, the locelli 4, apical, in a strong arch, introrse, the glands absent; whorl III columnar, ca. 1.2 x 0.5 mm, with a few hairs at base, the locelli 4, the upper pair latrorse, the lower pair extrorse, the glands globose, ca. 0.6 mm diam.; whorl IV absent; all stamens reddish brown; pistillode absent. Pistillate flowers and fruits unknown.
Discussion:Field notes. Trees to 15-18 m tall and 20 cm diam. Tepals green, maturing red.Etymology. The epithet refers both to the indument on all plant parts and to the color of the dried leaves, which together give the specimens a dirty appearance [Lat. sordidus, sordid].Rhodostemonodaphne sordida is similar and possibly closely related to R. morii. Both species have similar indument, leaf texture, venation, inflorescence position on the flush, and inflorescence morphology. They differ, however, in the color of the indument of the leaves, that of R. sordida being yellowish brown, and especially in the shape of the flowers, those of R. morii being urceolate, with minute, erect tepals and those of R. sordida having larger, spreading to reflexed tepals. Rhodostemonodaphne sordida is found in western Amazonia, while R. morii is a species of the Guianas.
Distribution:Brazil South America
| Amazonas Brazil South America