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220 FIELDIANA: BOTANY, VOLUME 28 Type in herb. Chi. Nat. Hist. Mus., collected on southeast-facing slopes, Ptari-tepui, state of Bolivar, alt. 1585-1600 m., November 10-11, 1944, Julian A. Steyermark 59988 (2 sheets), "tree 60-70 feet tall; leaves coriaceous, deep green and shining above, dull paler green below on older leaves, pale ferruginous below on young leaves; rachis, pedicels, and sepals orange-ferruginous; petals recurved, creamy-yellowish within; style and stigma pale green; fruit edible". Local name: This species is "para-raa-yek". similar to P. rubescens (Schott) Ducke, from which it differs in the shorter inflorescence, shorter pedicels, more densely ferruginous tomentum of the stems, flowers, and lower leaf surface, shorter styles, and in the hypogynous gland which is shorter and not 4-dentate. Roupala minima Steyermark, sp. nov. Frutex 0.8-1.1 m. altus; ramis solitariis infra simplicibus glabris; foliis adscendentibus, utrinque caeruleo-viridibus, coriaceis subsessilibus elliptico-oblongis vel suborbicularibus, basi angustatis vel rotundatis, apice obtusis vel rotundatis, integerrimis, marginibus incrassatis, omnino glabris, subtus nervo medio et nervis lateralibus paullo prominentibus vel inconspicuis, supra plus minus ve inconspicuis, laminis 13-30 mm. longis, 7-25 mm. lads; petiolis glabris, 1-2 mm. longis, racemis axillaribus vel terminalibus solitariis simplicibus, 5.5-9 cm. longis; rhachi glabro; floribus juvenilibus extus glabris; bracteis ovato-triangularibus subito longe attenuatis glabris, 1 ram. longis, 1 mm. latis; pedicellis glabris divaricate patentibus 1-3 mm. longis; ovario glabro; stylo tenui glabro in fructu ad 4 mm. longo; folliculis (maturis) coriaceis oblique oblongo-ellipticis basi substipitatis vel prominente attenuatis 20-28 mm. longis, 8-10 mm. latis. Type in herb. Chi. Nat. Hist. Mus., collected in savana, vicinity of "Misia Kathy Camp", on mesa between Ptari-tepui and Sororopa'ntepui, state of Bolivar, alt. 1615 m., November 15-17, 1944, Julian A. Steyermark 60234 (2 sheets), "shrub, single-stemmed, 2-4 feet tall; leaves ascending, coriaceous, blue-green both sides; rachis bluegreen". An unusually well-marked species, characterized by the low stature and stems simple and unbranched for three-fourths their length, and by the markedly small, crowded, ascending leaves, all of which combined impart a peculiar aspect to the plant. Roupala sororopana Steyermark, sp. nov. Frutex 1.2 m. altus; ramis in stato sicco purpureis glabris vel furfuraceis; foliis alternates coriaceis supra glabris viridibus, subtus furfuraceis femigineo-suffusis (in sicco specie purpureis) glabrescentibus elliptico- vel ovato-oblongis basi obtusis, apice obtusis vel rotundatis, larainis 6-11.5 cm. longis, 2.5-7 cm. latis; petiolis 1.5-3 cm. longis, ferrugineo-furfuraceis (in sicco purpureis) obtectis vel
BOTANICAL EXPLORATION IN VENEZUELA - I 221 glabris; racemis axillaribus simplicibus 12.5-13 cm. longis, 1-2 mm. latis, rhachi minute ferrugineo vel partim glabrato; pedicellis patent!- bus 2.5-4 mm. longis, ferrugineo-tomentosis; sepalis 7-9 mm. longis, extus minute furfuraceis; staminibus 4; antheris lineari-oblongis 3 mm. longis cum appendiculo rotundato; filamentis 3/4 longitudine ad calycem adnatis, in parte superiori quadrans liberis, pane liberi 1 mm. longo; squamellis hypogynis 4 suborbicularibus, 0.2-0.3 mm. longis; ovario breviter ferrugineo-hirsutulo, 1.5-1.6 mm. longo; stylo erecto glabro, 4.6 mm. longo; stigmate clavato parum incrassato. Type in herb. Chi. Nat. Hist. Mus., collected on rocky hematite exposures at west end, on summit, Sororopa'n-tepui, state of Bolivar, alt. 2225-2255 m., November 13, 1944, Julian A. Steyermark 60089. This is related to R. obtusata Kl. of Brazil and British Guiana, from which it may be distinguished by the tomentose pedicels and rachis of the inflorescence, the ferruginous scurfy tomentum on the lower leaf surface, as well as on some of the stems, petioles, and larger flowers. LORANTHACEAE Gaiodendron punctatum (Ruiz & Pavon) G. Don, var. puracense (H.B.K.) Steyermark, comb. nov. Loranthus puracensis H.B.K. Nov. Gen. & Sp. 3: 437. 1820; Gaiodendron puracensis (H.B.K.) G. Don, Gen. Syst. 3: 432. 1834. In his Flora of Peru, vol. 13, part II, no. 2, p. 397, Macbride states for G. puracense, "Perhaps only a variety of G. punctatum, but slenderer and smaller in all its parts". I am in agreement with this statement, and therefore a reduction of this entity to varietal rank is necessary. Knuth (Ink. Fl. Venez., in Rep. Sp. Nov. Veg. 43: 301. 1928) refers an Vie collection from Roraima to G. punctatum, but it is probable that it belongs to this variety puracense which the present author collected on Ptari-tepuf in the same general region. Pittier et al in the Catalogo de la Flora Venezolana, vol. 1, p. 268, under G. punctatum, state that "el material que poseemos en el herbario bajo esto nombre, parece ser referible a la siguiente especie" (G, Tagua). Thus, outside of the Vie collection above cited, the following collection is the only Venezuelan material with deep yellow flowers that can be referred correctly to the G. punctatum group: "Growing 35 feet up on bluffs, along base of south-facing high sandstone bluffs, Ptari-tepui, state of Bolivar, alt. 2410 m., November 6, 1944, Julian A. Steyermark 59912, flowers very fragrant, like exotic perfume; floral buds orange-yellow; style, filaments, and petals deep yellow, calyx pale green; leaves coriaceous or subcoriaceous, deep green above, pale green below; petals recurved in upper half; shrub 3 feet tall".
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o 2 CM XI E> RAR.Y OF THL UNIVERSIT
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FIELDIANA: BOTANY A Continuation of
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NUMBER 1 LIST OF ILLUSTRATIONS TEXT
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PAGE 67. Emmotum ptarianum 342 68.
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