vix 1 em. longo minute puberulo; pedicellis ca. 2 mm. 
longis minute puberulis: bracteis minute ovatis vix 1 
mim. longis. Calycis laciniae ovatae acutae ca. 1.5 mm. 
longae minute papillatae intus basi squamella profunde 
lacerata munitae. Corolla infundibuliformis lutea extus 
minutissime papillata: tubo proprio ca. 2 cm. longo basi 
ca. 1 mm. diam. paululo gibboso; faucibus tubulo- 
‘ampanuliformibus ca. 1.7 cm. longis, ostio ca. 0.6 em. 
diam. : lobis late dolabriformibus patulis ca. 1.2 > ¢m. 
longis. Antherae late oblongo-sagittiformes basi rotun- 
date 2-lobae ca. 3.5 mm. longae apice minutissime bar- 
batae caeterumque glabrae. Ovaril carpella vix 1 mm. 
longa glabra nectario late 5-lobo ovario ca. dimidio 
aequante; stigmate pentagono-umbraculiformi obscure 
apiculato ca. 1 mm. longo. Folliculi gracillimi faleati 
obscure articulati usque 10 em. longi. 
Mandevilla annularifolia is closely allied, indubitably, 
to M. Benthamiu of the Roraima shield of interior Vene- 
zuela and Guiana, which are low erect shrubs with some- 
what broader and thicker leaves and more elongate in- 
florescences. The suggestively antediluvian appearance 
of Mandevilla annularifolia is imparted by the narrow, 
whorled leaves borne in dense tufts at the ends of the 
thick, frequently whorled branchlets. 
Cotompia: Comisaria del Vaupés, Rio Apaporis, Cachivera de Jiri- 
jirimo y alrededores. Altitude about 250 m. September 16, 1951. 
Richard Evans Schultes & Isidoro Cabrera 14013 (Tyrer in Mo. Bot. 
Gard.).—Rio Apaporis, Raudal de Jirijirimo, November 27, 1951. 
Schultes & Cabrera 146.27.—Rio Apaporis, Raudal de Jirijirimo, below 
mouth of Rio Kananari, December 8, 1951. Schultes & Cabrera 1050.3, 
—Comisaria del Vaupés, Rio Piraparana, tributary of Rio Apaporis, 
September 18, 1952. Schultes & Cabrera 17536, 
Mandevilla cuneifolia Woodson sp. nov. 
Frutex volubilis: ramulis gracilibus glabris. Folia 
decussata breviter petiolata; lamina obovata vel elliptico- 
obovata abrupte acuminata basi acuta 4-7 cm. longa, 
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