64 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



margins membranous; squamellae oppositisepalous, semicircular, 0.7 mm Long, 

 faintly toothed at the apex. Corolla hypoerateriform, pink-tinged white with 

 the lobes yellowish at the base; tube 1 cm long, 4.5 mm wide (pressed), glabrous 

 outside, pilose at the upper half within, the epistaminal appendages scale-like, 

 ovate, laterally flattened, about 0.8 mm long and almost as wide, attaining the 

 faucal annulus, the callous faucal annulus papillose; corolla-lobes dextrorsely 

 convolute in aestivation, becoming reflexed, obliquely oval-orbicular subdolab- 

 riform, 17 cm long, 13 mm wide, glabrous outside, sparsely ciliate at the apex, 

 finely veined, papillose toward the base within. Anthers agglutinated to the 

 stigma, connivent into an exserted cone, pilose dorsally, lanceolate, 5-6 mm long, 

 acute at the apex, sagittate at the base, the lobes 1 mm long ; filaments inserted 

 near the summit of the corolla-tube, laterally flattened, pilose on the lower mar- 

 gin, decurrent as a sharp ridge on the corolla-tube, the free part about 2.3 mm 

 long, 0.8 mm broad. Ovary rounded at the apex, glabrous; style slender, the 

 clavuncle 2 mm long, the stigma apiculi blunt; nectaries 5, thick, about the 

 height of the ovary. 



VENEZUELA: Amazonas; Eio Guainia, occasional along Ca-fio San Miguel just above 

 Limoncito, 15 kin from Rio Guainia, alt, 100-140 m; tree 5-6 m, with clear sap, corolla 

 white, pink-tinged, the deflexed lobe-bases yellowish; 28 .Tun 1959, J. J. Wurdack 4' L. S. 

 Adcterley 43232 (holotype, NY). 



Dr. Wurdack, who saw this distinctive plant in the field, has confirmed its 

 arborescent, not liana, habit. The species is best placed in sect. AnnuJares in 

 Woodson's treatment (1936), but the calyx-lobes are small and non-foliaceous. 

 It recalls P. Icptoloba Monachino. 



Tabernaemontana tenuis Monachino, sp. nov. Fig. 44 H-O. 



Frutex vel arbor parva, ramulis gracilibus; foliis glabris coriaeeis coneolo- 

 ribus oblongis usque ad sublanceolata 4-11 cm longis, 0.8-3 cm "latis, ad apicem 

 rotundatis vel obtusis, ad basim angustatis ; reticulo venarum indistincto, venis 

 lateralibus plusminusve rectis patenti-adscendentibus, 15-25 jugis; inflorescentiis 

 lateralibus brevibus paucifloris glabris; pedicellis 4 mm longis; sepalibus ovatis 

 glabris 2.3 mm longis 1.6 mm latis obtusis; squamellis paucis^ tubo corollae 12 

 mm longo intus medio pubescenti ; lobis corollae glabris tubo aequantibus 8 mm 

 latis; staminibus in medio tubi corollae insertis; antheris gracilibus sessilibus 

 glabris 3.7 mm longis, lobis 0.5 mm longis; ovario glabro ; nectario crateriformi 

 integro 0.8 # mm alto; elavuneulo 0.8 mm alto, apiculis brevibus obtusis. 



Shrub or small tree, 0.3-4 m tall, the branchlets slender, less than 6 mm thick, 

 greyish. Leaves opposite, completely glabrous, coriaceous, concolor, dull ; petioles 

 1 cm long, faintly verrucose, the axillary glands many, linear, less than 1 mm 

 long; blades oblongish to sublanceolate, 4-11 cm long, 0.8-3 cm broad, narrowed 

 into the petiole at the base, rounded to obtuse at the apex, not acuminate, 

 their margins revolute, brown-puncticulate beneath (constant?), the venation 

 not prominent, the principal lateral nerves faintly raised, straightish, spreading- 

 ascending, 15-25 pairs. Inflorescences quickly appearing lateral, cymose, short, 

 few-flowered, about 8-flowered, 'essentially glabrous. Pedicels glabrous or micro- 

 scopically hirtellous, 4 mm long. Sepals almost free, glabrous, thin, broadly 

 ovate, slightly unequal in size, 1-2.3 mm long, 1.6 mm broad, obtuse, the squamel- 

 lae oppositisepalous, about 5 or 6 in number. Corolla hypoerateriform, white 

 with a yellow throat, glabrous without ; tube 11-12 mm long, 2-3.3 mm wide 

 (pressed), slightly constricted at the middle and the orifice, hirtellous to 



