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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 9, No. 3 



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Cerro Huachamacari, elev. 1800 m, Dec. 10, 1950, Maguire, Cowan & Wurdack 

 30085; woody vine, sepals purple, keel yellowish, frequent in cumbre near Summit 

 Camp, Cerro huachamacari, elev. 1800 m, Dec. 15, 1950, Maguire, Cowan & 

 tturdack 30251. 



S. ecristata is related to a poorly defined group of ecristate Andean taxa with 

 pubescent ovary wings: S. atropurpurea Turcz. s S. clasycarpa Turcz.,^ 5". densiflora 

 Lind. & PI. s S. purpurea Lind. & P1. 9 S. planchoniana Xillip & Dugand^ S. trianaei 

 Xillip & Dugand s and S. schlimii PI. 8>. Lind. ex Tr. & PI. The first four of these 

 have leaves evenly pubescent above and loosely puberulent below. S. trianaei 

 has large flowers; S. schlimii has alae prominently strigulose externally, leaves 

 of a different shape, and branchlets with spreading pubescence; and S. plan- 

 choniana has alae densely strigulose externally and leaves densely rufous-puberu- 

 lent below. Probably other floral differences exist, but authentic material of all 

 the Andean taxa has not been seen; however, Dr. Cowan examined type material 

 of several species for me at Kew and the British Museum. 



Securidaca savannarum Wurdack, sp. no v. 



Frutex scandens; rami teretes valde ramulosi aeque cum petiolis inflorescentiis 

 pedicellisque modice albo-hirsutuli. Folia ovato-elliptica vel elliptica apice late 

 acuta vel rotundata basi rotundata vel leviter emarginata, infra inflorescentias 

 3-5.5 x 2-3-5 cm apud inflorescentias vix minora crasse coriacea marginibus 

 revolutis extremibus sparsissime hirsutulis, supra nitida glabra, subtus conspicue 

 pallidiora modice vel sparse aureo-strigulosa, costa supra leviter impressa subtus 

 prominente, nervis primariis utrinque 6-8 supra leviter expressis vix reticulars 

 subtus leviter expressis reticulatisque; petiolus 2-3 nim longus robustus basi 

 glandulis come is 1-1.5 mm diam. vix elevatis praeditus. Racemi axillares incon- 

 spicui 1-1.5 cm longi solitarii-terni glandulis corneis 0.5-0.8 mm diam. in rhachi- 

 bus rlores subtendentibus; bracteae parvae 0.6-0.8 mm longae; pedicelli 3-5 n^rn longi 

 graciles. Sepala exteriora orbiculari-ovata apice rotunda extus per costam aut per 

 partem centralem sparse hirsutula intus modice strigujosa; posticum 2.3-3 x 2 

 mm; dua antica 2-2.7 x 1.7-2 mm; alae unguis vix distinctus, ala 5-6.5 x 4.4-5 mm 

 glabra eciliata lamina orbiculari-obovata vix emarginata. Petala lateralia oblonga 

 rotunda 5-6 x 1.5-1.7 mm parte media sparse ciliata extus parte media sparse 

 hirsutula intus parte media basique modice hirsutula, dente laterali vix conspicua; 

 carina tota 5.5-6 mm longa glabra eciliata, ungue 2.3-2.9 mm longo, crista pro 

 flore grandi ut plicata 0.7 x 2 mm plus minusve integra vix undulata transverse 

 medieque plicata. Staminum vagina 5-5.5 mm longa extus glabra vel parte dimidia 

 basali sparsissime hirsutula intus parte dimidia basali dense hirsutula; filamenta 

 libera 0.3-0.5 mm longa; antherae 0.3-0.4 mm longae apice rotundae. Ovarium 

 1-1.2 mm longum inaequaliter bialatum ala minori sparsissime hirsutula vel glabra 

 alioqui glabra stipite 0.2 mm longo, stylo gracili 4.3-4.8 mm longo 0.2 mm lato 

 parte tertia distali curvato (angulo 60°-80°), stigma 0.5 mm latum. Fructus 

 ignotus. 



HOLOTYPE: vine in shrubs, fls creamy yellow with lateral petals apically 

 purplish, edge of Savanna No. 1, northwest base of Cerro \apacana, Alto Rio 

 Orinoco, Terr. Amazonas, Venezuela, elev. 150 m, Mar. 17, 1953, Maguire & 

 Wurdack 34499 (NY). Paratype: same locality, Jan. 7, 1951, Maguire, Cowan & 

 Wurdack 30776. 



The leaves of S. savannarum are not unlike those of S. ecristata, but thicker 

 and more nitid; in flower structure however, there are many differences. Perhaps 

 the closest relative is 5". lateralis A. W. Benn., which has a similar large carinal 

 crest (vide A. C. Smith 3170 and V/ilson-browne 658); the British Guiana specimens 

 may be distinguished by the thinner leaves with more cordate bases and looser 



