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76 FIELDIANA: BOTANY, VOLUME 28 longa, 7.5 mm. lata, 3-lobata, lobis 3-4 mm. latis rotundatis sparse hispidulis, supra pilis fusco-nigris pluristriatis ad margines scariosis, interiore 5-6 mm. longa, 11-12 mm. lata, irregulariter 5-7-lobata, lobis 2.5-3 mm. longis, 2-3 mm. latis, rotundatis moderatim vel tenuiter hispidulis, pilis nigris vel fuscis ad margines scariosis; drupa subgloboso-oblata vel late turbinata, apice subtruncata, 15-16 mm. alta, 18-21 mm. lata, glabra tenuiter pluristriata. Stems armed with pale spines arranged in fan-like groups; fronds dark green above, dull green below; pexiole moderately armed in lower half with flattened unequal spines, pale brown except black at base and these tip, densely scattered over the basal 30 cm., but sparse and irregular in the next 30 cm., absent beyond this, all parts of the rachis densely dark brown scurfy- furfuraceous; pinnae 10 pair on one side, 12 on the other, unequally arranged and interrupted with gaps of 10-20 cm. along rachis, the pinnae arranged in groups of 2-4; terminal pinnae widely divergent at a 60 angle, densely setulose near apex; middle pinnae 37-47 cm. long, 4.5-6 cm. wide, conspicuously narrowed and curved to the base, lower pinnae 30-48 cm. long, 2.5-6 cm. wide, the main midrib mostly in center of pinna, but becoming asymmetric or towards one side near either end of the pinnae; primary nerves 6, glabrous above, below buff-furfuraceous at base of and (or) on main midrib and on some of primary nerves at base of pinnae, otherwise glabrous below, sometimes portions of the surface minutely scurfy, the margins of the apices and upper portion black setulose with slender setae 1.5-2.5 mm. long; spathe densely pubescent with dark brown hairs and black-brown setae mixed with flattened membranaceous spines which are long-attenuate at apex, brown and buff-scarious on margins, dark brown at base; axis of rachis of spadix not produced through the inflorescence, but terminating shortly, the branches of the spadix scrobiculately marked by the locations of the flowers; fruiting calyx double, the outer smaller; fruit purpleblack, edible, with sweetish-acid juice, subtruncate at apex, abruptly tapering to a slightly raised central mound, apiculately tipped, the central mound about 8 mm. in diameter and marked by a circular depression, gradually attenuate at base, the body of the fruit 18-21 mm. broad. Type in herb. Chi. Nat. Hist. Mus., collected in lower portion of Quebrada O-paru-ma', tributary of Rio Pacairao, below Santa Teresita de Kavanayen, state of Bolivar, alt. 915-1065 m., November 25, 1944, Julian A. Steyermark 60542. Local name: "Kamar-ba-yek". The trunk of this palm is used locally by the Indian inhabitants for the terminal portion of the arrow (Kamarba), the other part of the arrow being known as " purau". The specific name is taken from the Pemo'n language of the Taurepan Indians of Ptari-tepui, the word "kamarupa" signifying a spiny tree used for making arrows. Although the name for the tree was given apparently as "kamarba", it seems preferable to employ the more generally known word "kamarupa".
BOTANICAL EXPLORATION IN VENEZUELA - I 77 This species somewhat approaches Bactris Gastoniana Barb., but differs in the leaf rachis, which is smooth except at the basal part, shape of the drupe, greater number of pairs of pinnae, long spiny stem, pale spines of the stem, and other differences. From B. arista ta Mart, it differs in its many-branched spadix and rachis armed at base; from B. rivularis Barb, it differs in the shape and number of the pinnae, and other particulars, while from B. maraja Mart, it differs in the fuscous-pubescent rachis which is aculeate only at base, in the larger number of pinnae, and the shorter spadix. It is characterized by the scurfy-furfuraceous leaf rachis which is unarmed except at base, the sigmoid oblanceolate long-falcate pinnae acuminate at apex, the long pale-colored spines arranged in fan-like groups on the stems, the densely spinose spathe, and the short several-branched spadix. Bactris ptariana Steyermark, sp. nov. Caudex 6-9 m. altus, 5-10 cm. crassus, solitarius, ad annulos aculeis nigris 4-32 mm. longis dense aggregatis armatus; fronde 1.91 m. longa; vagina fusco-tomentosa aculeis brevibus 0.6-2 cm. longis applanatis; petiolo 55-60 cm. longo basi 4 cm. lato; rhachi infra prope basem aculeis nigris dense aggregatis annulatis minoribus et majoribus; pinnis inermibus utrinque 40 plus minusve regulariter dispositis suboppositis concoloribus lineari-lanceolatis tenuiter acuminatis, 55-85 cm. longis, 1-3 cm. latis, supra glabris infra omnibus nervis hispidulis; spadice 15-22 cm. longo, usque ad 10 cm. lato, ramulis 20-25, 13-17 cm. longis, 2-3 cm. crassis dense hirtellis; pedunculo 18 cm. longo, 15 mm. lato, supra inermi dense pallidovelutino infra setis brevibus nigro-fuscis dense vestito; spatha fusiforrai clavato-acuta, 40-48 cm. longa, parte inferiore usque ad 7 cm. lata, aculeis densis brevioribus fuscis vel castaneis et longioribus intermixtis nigris patentibus obtecta, dense velutina; floribus masculinis cum foemineis intermixtis ad ramorum apices aggregatis, breviter pedicellatis, pedicellis 0.8 mm. longis glabris: calyce 1 mm. longa, 3 lobis late triangularibus obtusis 0.8 mm. longis, 0.6-0.7 mm. latis, glabris fusco-maculatis lineolatis; corolla ultra medium divisa, 3 lobis ovatis superne subito angustata 2 mm. longis, 1.5 mm. latis, apice fusco-maculatis; staminibus 6, filamentis tenuibus glabris, 1.2 mm. longis; antheris oblongis, 0.8-0.9 mm. longis; floribus foemineis: calyce 0.8-1.1 mm. longa, 3.5 mm. lata, 3 lobis fere obsoletis; corolla 3 mm. longa, 3 mm. lata, 3 lobis late triangularibus subcuculatis obtuse apiculatis, parce stipitato-glandularibus obtecta; drupa obovoidea, 11 mm. longa, 11 mm. lata, glabra plerumque calva apice apiculata. Spines on trunk densely clustered in annulate arrangement, the trunk annulate about 3 cm. between the spines; frond subcoriaceous to firmly membranaceous, deep green above, dull green below; rachis of frond concave above at very base, convex below, in lower and middle parts convex below, carinate and bifacial above, the lower
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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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CONTRIBUTIONS TO THE FLORA OF VENEZ
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