Prestoea tenuiramosa (Dammer) H.E.Moore, Gentes Herb. 9: 286 (1963)

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Brazil Northpresent (World Checklist of Arecaceae)B
Guyanapresent (World Checklist of Arecaceae)B
Venezuelapresent (World Checklist of Arecaceae)B
Guayana Highland (tepuls) of Venezuela (Amazonas, Bolivar) and adjacent Guyana and Brazil (Amazonas). cloud forest at 1200-2000 m. (Gloria Galeano & A. Henderson, Flora Neotropica Monograph 72)A

Common Name

Description

  • Stem solitary or cespitose, erect, 4-10 m tall , 8- 20 cm diam.
    Leaves 7-15; sheath open and not forming a crownshaft or forming an indistinct crownshaft, persistent, ca. 50 cm long, reddish brown or maroonpurple, with scattered, appressed, brown scales, fibrous at the margins distally; petiole 20-40 cm long, covered with apressed, brown or white scales; rachis to 1.8 m long, with scales like those of petiole; pinnae 38-45 per side, regularly spaced and spreading horizontally in the same plane, subopposite or alternate, linear- lanceolate, long-acuminate, strongly plicate, punctate on abaxial surface, with prominent midvein and several lateral veins. Abaxial surface of veins with prominent, scattered, brown ramenta especially on midvein; basal pinna 27-37 x 0.2-0.8 cm; middle pinnae 43-65 x 2.5-3 cm; apical pinna 18-22 x 0.8- 1.5 cm.
    Inflorescences infrafoliar or interfoliar, corymbose; peduncle 26-30 cm long, 1 cm diam., ± terete; prophyll to 35 cm long, 4-5 cm diam.; peduncular bract to 97 cm long, ca. 3 cm diam.; rachis 33-36 cm long; rachillae ca. 40, 40-48 cm long proximally, 18-20 cm long distally, 2-3 mm diam., sparsely to densely covered with short, irregular, branched, brownish, crustose hairs; flowers in triads almost to apices of rachillae; triad bracteole small; first flower bracteole very small, rounded, second and third flower bracteoles scarcely apiculate, rounded, 0.5 mm high; staminate flowers 3.5-4 mm long, sessile; sepals deltate, 1-1.5 mm long, gibbous; petals ovate-lanceolate, 3.5-4 mm long; stamens arranged on a short receptacle; filaments 1-2 mm long, flattened; anthers 2- 2.5 mm long; pistillode 1- 1.5 mm long, trifid at the apex; pistillate flowers 2-3 mm long; sepals very widely ovate, 2 mm long; petals very widely ovate, 2 mm long; staminodes digitate.
    Fruits globose, 1-1.2 cm diam. , the stigmatic remains lateral; epicarp purple-black; seeds globose; endosperm deeply ruminate; eophyll not seen. (Gloria Galeano & A. Henderson, Flora Neotropica Monograph 72)A

Materials Examined

  • VENEZUELA. AMAZONAS: Cerro de la Neblina, Camp VII, NE of Pico Phelps (Neblina), 00°50'N, 65°58'W, 1800 m, 1 Feb 1985, Nee 30705 (BH, MO, NY).
    BOLIVAR: Ptari-tepuí, camp below S face of mountain, 1600-2000 m, 14-19 Aug 1970, Moore et al. 9717 (BH, NY); Cerro Venamo, SW part nr. border wilh Guyana, 1220-1275 m, 6-7 Jan 1964, Steyermark 92745 (BH, NY); drainage of Río Cuyuní, 140 km S of El Dorado, 1300-1380 m, 22-28 Dec 1970 Steyermark et al. 104343 (BH, MO, NY); drainage of Río Cuyuní, beside Huaca-waku, km 139 S of El Dorado, 1300-1380 m, 23-24 Dec 1970, Steyermark el al. 104382 (BH, MO, NY).
    GUYANA. Ayanganna slope. 4 Mar 1960. Forest Department 7949 (NY); Cuyuni- Mazaruni Region, 2- 5 km NW of Roraima, 05°15'N, 60°35'W, 1500-2000 m, 24 Feb 1989, W Hahn & Gopaul 5500 (K, NY) BRAZIL.
    AMAZONAS: Cordilhcira Pacaraima, camp at BV9, 1200 m, 18 Sep 1979, Rosa & Nascimento s.n. (MG). (Gloria Galeano & A. Henderson, Flora Neotropica Monograph 72)A