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80 FIELDIANA: BOTANY, VOLUME 28 Pinnae chartaceous, deep green above, dull green below, irregularly but closely disposed, proximate, sigmoid, the apex upwardly curved and long-acuminate, the terminal pair, and sometimes the lowest pair, the longest, the midrib prominent, but shifting from central to the other side near the ends of the pinnae, primary ribs 1-2 on each side; spathe furfuraceous, becoming glabrescent; drupe green, filled with a homogeneous seed. Type in herb. Chi. Nat. Hist. Mus., collected in woods bordering savanna, along Rio Karuai, at base of Sororopan-tepui, west of La Laja, state of Bolivar, alt. 1220 m., November 29, 1944, Julian A. Steyermark 60781. Local name: "Moy-ye-ki-yek". A game is sometimes played with the stems of this species. An Indian that can pull the tough stem from the ground thereby gives proof of his strength or force. This species is related to Yuyba Maguirei Bailey (Bailey, L. H. Bull. Torr. Bot. Club 75: 106. 1948.) = Bactris Maguirei (Bailey) Steyermark, comb. nov. I cannot agree with Bailey that these diminutive palms should constitute a genus distinct from Bactris. The dwarfing of general stature, together with its associated smaller size of spathe, peduncle, and reduction of spines on the trunk, should not be regarded as generic characters. They might, on the other hand, be considered as setting off a distinct section within the genus. Both Yuyba and Bactris have 6 stamens, and Bactris may have even 9 or 12. From B, Maguirei this new species differs in its more densely brown-scurfy leaf rachis, the tips and upper margins of the pinnae more closely black-setulose, the shorter spathe and spadix, the more closely crowded pinnae, and the somewhat shorter spines of the stem and leaf sheath. From B. microspadix Burret, it may be distinguished by the smaller peduncle of the inflorescence, the shorter petiole not spiny at base, and the shorter spathe and pinnae, while the simple spadix, brownfurfuraceous leaf rachis, and the number of pairs of pinnae differentiates it from B. microspatha Barb. It is closely related to B. mitis, which, however, has a 2-3-fid spadix with glabrous rachis, an unarmed leaf sheath and rachis, and 6,8-10 pairs of pinnae not as closely set together as in, fi. sororopanae. From the closely related B. paucisecta Burret of British Guiana, the new species differs in the tomentose or furfuraceous rachis, shorter spadix, narrower and shorter apical leaf segment, and less number of primary nerves. Bactris venezuelensis Steyermark, sp. nov. Caudex 3 m. altus, supra 1.5 cm. crassus; frondis vagina fuscotomentosa furfuracea, aculeis brevibus tenuibus nigris instructa; petiolo 20-27 cm. longo infra pallido-tomentoso-furfuraceo, aculeis nigris supra longioribus 3-4 cm. longis, infra brevioribus numerosis 0.6-2.2 cm. longis armato; rhachi 28 cm. longa, 4-5 mm. crassa,
BOTANICAL EXPLORATION IN VENEZUELA - I 81 pallid o-fusca furfuracea mox glabrescenti, prope basim aculeis nigris 2-3.5 cm. longis armata; lamina 55-75 cm. longa, 30 cm. lata, apice profunde bifida, paucisecta, segmentis utroque latere infra 2-4 irregulariter et inaequaliter dispositis lanceolatis sigmoideis supra glabris subtus pilis pallidis dissitis minute adpressis et ad nervos inconspicue furfuraceis, ad margines setis brevibus tenuibus nigris 1.5-2 mm. longis; segmenta terminal! magna cuneato-oblanceolato-obovata, parte indivisa 13-16 cm. longa, 12-18.5 cm. lata, lobis oblongolanceolatis, 20-35 cm. longis, 7-10 cm. latis, nervis primariis utroque latere 8-9; segmentis lateralibus altermatis aut suboppositis, 30-50 cm. longis, 1.5-4.5 cm. latis, nervis primariis utroque latere 2-3, nervis secundariis 7-10; spatha exteriore 5 cm. longa, interiore fusiformi 11-12 cm. longa, setis fuscis pilosis vel glabrescentibus 5-6 mm. longis vel brevioribus dense obtecta, fusco-tomentosa; spadice patenti demum pendenti, ramulis 8 gracilibus, 7.5-9.5 cm. longis, 1-1.5 mm. latis, crassis conspicue scrobiculatis paullo toraentosis; rhachi 1 cm. longa dense fusco-tomentosa, pedunculo 4-4.5 cm. longo, 4 mm. crasso, inermi dense pallido-fusco-tomentosa furfuracea; floribus masculinis ignods; floribus foemineis: calyce urceolata, 3-3.5 mm. longa, 2.5-3 mm. lata, 3-denticulata glabra pluristriata; corolla quam calyce longiore tubulosa 5-5.5 mm. longa, apice subtruncata ciliato-setulosa, pluristriata, superficie setulosa setis brevibus paucis nigris, mox deciduis. Petiole spiny, the spines above longer and more scattered, shorter and more numerous in lower part; sheathing base of petiole shredding at sides; lamina deeply bifurcate at apex into a large terminal segment with 2-4 pairs of lanceolate sigmoid segments irregularly and unequally distant below, glabrous above, minutely appressedpubescent below with scattered pale hairs and furfuraceous on the lower surface of some of nerves; lateral segments tapering to an elongate apex, often remotely separated from the terminal bifurcate segment; axis of spadix not continued throughout its length, branches conspicuously scrobiculate from the insertions of the flowers; pistillate calyx slightly 3-denticulate with shallow lobes. Type in herb. Chi. Nat. Hist. Mus., collected in forest along Base River (Cano Negro), at southeastern base of Cerro Duida, Territorio Federal Amazonas, alt. 225 m., August 23, 1944, Julian A. Steyermark 57933. This species is closely related to B. corosilla Karst., B. geonomoides Drude, B. incommoda Trail, and B. penicillata Barb. From the last one it differs in the shorter spathe and spadix, shorter lamina, and black instead of brown petiolar spines. From B. geonomoides and B. incommoda it differs in the broadly lanceolate-falcate instead of linear lowermost pair of pinnae, in shorter brown instead of longer black spines covering the outer surface of the spathe, and in the somewhat shorter spathe.
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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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