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154 FIELDIANA: BOTANY, VOLUME 28 This is the second species to be described in the genus Nietneria, previously represented by the single species /V. corymbosa & Klotzsch Schomb. of the Roraima region. It differs from that species in having a paniculate elongate instead of corymbose or subcorymbose inflorescence, the flowers more separated, much shorter bracts at the base of the lowest flowering branches, those in TV. corymbosa being more foliaceous, 7-9 mm. long in anthesis and 16-20 mm. long in fruit, the tips of the leaves long- or narrowly acuminate, whereas in N. corymbosa they are short-acute to subacuminate, and finally in the middle and upper bracts of the scape, which in N, corymbosa are more foliose and better developed. Smilax duidae Steyermark, sp. nov. Frutex scandens ubique glaber; ramulis teretibus laevibus vel minute tuberculatis, inermis; petiolis crassis, 30 cm. longis basi dilatis; laminis coriaceis elliptico-oblongis, 20-21 cm. longis, 7-9 cm. latis, obtusis vel acutis, basi subacutis et in petiolum subito contractis, basi 5-nervatis, nervis extimis minus prominentibus; pedunculis umbellarum mascularum in racemis bracteatis ad 5.5 cm. longis dispositis; bracteis oblongis acutis, 5.5-6.5 mm. longis; pedunculis 20-23 mm. longis,- paullo compressis; receptaculis masculis subglobosis 2 mm. diametro; floribus pallido-viridibus 21-23 per umbellam; pedicellis pallido-viridibus gracilibus 6-7 mm. longis; perianthii segmentis oblongis, 4.5-5 mm. longis, circiter 1.2 mm. latis, subacutis; staminibus perianthium aequantibus; filamentis 2.5 mm. longis; antheris linear! oblongis, 2.2 mm. longis. Type in herb. Chi. Nat. Hist. Mus., collected on Cerro Duida, southeastern-facing forested sandstone slopes along Cano Negro (tributary of Cano Iguapo), Territorio Federal Amazonas, alt. 260- 610 ra., August 26, 1944, Julian A. Steyermark 58057. This species resembles S. pseudosyphilitica Kunth in appearance, but differs in having larger staminate flowers, much longer peduncles, and longer pedicels. The general shape and large size of the leaves simulate those of 5. graciliflora A. C. Smith and S. grandifolia Regel, but those species have aculeate stems. From 5. immersa A. C. Smith the new species may be distinguished by the larger 5-nerved leaves, longer peduncles and pedicels, and longer perianth segments. Smilax Lasseriana Steyermark, sp. nov. Caulis fruticosus teres striatus, tenuiter tuberculatus, ramulis novellis striato-angu latis minute tuberculatis, inermis, scabridulis; petiolis crassis, 5-7 mm. longis, apicem versus incrassatis et rugulosis; larainis coriaceis, supra lucidis, ovato-oblongis, 6-9 cm. longis, 3-5.5 cm. latis, basi subcordatis in petiolura subito contractis, apice obtusis breviter calloso-mucronulatis, e basi conspicue 3-5-nervatis, venis utrinque prominulis in rete grosso areolatum connexis; umbellis foemineis axillaribus; pedunculis foemineis
BOTANICAL EXPLORATION IN VENEZUELA - I 155 brevibus, 2-10 mm. longis, striatis; pedicellis foemineis 1 mm. longis, 0.6 mm. latis; perianthii segmentis anguste oblongis obtusis, exterioribus 1.8-1.9 mm. longis, 0.8-0.9 mm. latis, interioribus 1 .5 mm. longis, 0.5 mm. latis, apice incurvato-cucullatis; stigmatibus brevibus, sessilibus, incrassatis, latioribus quam longioribus, 0.5 mm. altis; ovario 1.5 mm. longo. Type in herb. Chi. Nat. Hist. Mus., collected onSororopan-tepuf, crest of cerro between east and west end, state of Bolivar, alt. 2255 m., Julian A. Steyermark 60121, "sprawling over ground by wooded streamlet; stems wiry; leaves coriaceous, deep green both sides; flowers pale green." This species is named in honor of Dr. Tobias Lasser of the Servicio Botanico of the Ministerio del Agricultura y Cria in Caracas. In the obtusis h, apiculate leaves and scabridulous stems this species resembles S. rufescens Griseb., from which it differs chiefly in the subsessile, pistillate peduncles and shining upper surface of the cordate or subcordate leaves. Smilax viminea Griseb. has subsessile peduncles, but much narrower leaves. Smilax Williams it Macbr. has obtusish leaves, but non-scabrous, non-verrucose branches, and the reticulation of the upper surface of the leaf blades consists of smaller areolation. Smilax Pittieriana Steyermark, sp. nov. Frutex scandens ubique glaber; ramulis teretibus laevibus inermis; petiolis 1-1.5 cm. longis; laminis coriaceis oblongo-lanceolatis, 7-14 cm. longis, 1.5-5 cm. latis, acutis vel acuminatis, basi subacutis vel obtusis in petiolum contractis decurrentibus, e basi 3-5- nervatis, nervis extimis inconspicuis; pedunculis umbellarum mascularum axillaribus solitariis c ire her 2.5 cm. longis, paullo compress is; receptaculis masculis subglobosis 2 mm. diametro; floribus viridescenti-flavidis, ca. 6 per urabellam; pedicellis masculis gracilibus 9-12 mm. longis, 0.4-0.5 mm. latis; perianthii segmentis linearioblongis obtusis subaequalibus, 5.2-5*3 mm. longis, 1.2-1.4 mm. latis, extus apicem versus et ad marginem parce et minute papillosotomentulosis, 1-nervatis; staminibus brevioribus quam segmentis; filamentis 2 mm. longis; pedicellis foemineis 6-7 mm. longis, 0.3-0.5 mm. latis; perianthii foeminei segmentis linearioblongis obtusis, 4 mm. longis, I mm. latis, extus apicem versus parce papillosotomentulosis; staminodiis 6, subulatis, 1.2 mm. longis, arcuatoadscendentibus; stylis 3, crassis, carnosis, oblongis, parte superiore tercero paullo constrictis 1-1.2 mm. longis; ovario 1.5 mm. long. Type (staminate plant) in herb. Chi. Nat. Hist. Mus., collected in scrubby forest at margin of swampy meadow, vicinity of "Misia Kathy camp", on mesa between Ptari-tepui and Sororopan-tepui, state of Bolivar, alt. 1615 m., November 15-17, 1944, Julian A. Steyermark 60251; co-type (pistillate plant), same locality, Steyermark 60251a.
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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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BOTANICAL EXPLORATION IN VENEZUELA
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