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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