Monographs Details: Pleurothyrium panurense (Meisn.) Mez
Authority: Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.
Description:Distribution and Ecology - Distribution. Tree or shrub, according to Mez, to 20 m, 35 cm in circumference, occurring sometimes in clay-silicose soil on the banks of ravines along the Rio Negro and tributaries in Amazonas, Brazil. BRAZIL. Amazonas: terreno, argilloso-silicoso, mata, beira decorrego, Jauarete, Vaupes, Froes 21235 (fl. NY), Manaos, 20526 (fr. NY).
Nectandra panurense Meissner in DC. Prodr. 15: 157. 1864.
Type. Prope Panure ad Rio Uaupes, Amazonas, Brazil, R. S. Spruce 2449, Oct 1852-Jan 1853 (isotype, fl. NY).
Vernacular Name. Louro (Froes).
The infructescence and fruit of this species were unknown until the abovecited collection was made. The stout infructescence is glabrescent, and has only a single fruit, black in the dried state, ellipsoid, about 15 X 9 mm, subtended by a cyathiform cupule about 10 mm long and 12 mm in diameter, the margin thin and somewhat erose, the surface rough, with a few large (about 2-3 mm in diameter), pale brown tubercles, seated on an expanded, obconic pedicel 8 mm in length and 5 mm or less wide at the apex.
The dark, reddish-brown pubescent branchlets, the rather shining leaves with stout midribs and 10-12 pairs of nerves impressed above and very prominently, conspicuously elevated beneath are characteristic of the species. Particularly noticeable is the regular pattern made by the confluent nerves near the margin of the leaves, which is frequently characteristic of the genus.
Distribution:Brazil South America