or small tree up to 9 feet tall. Leaves thick papyraceous. Flowers red 
(petals) and yellow (stamens).’’ December 12, 1947, Richard Evans 
Schultes & Francisco Lépez 9298.—Same date and locality, 9336A.— 
Comisaria del Vaupés, Rio Negro, vicinity of Piedra del Cocui. De- 
cember 27, 1947, Richard Evans Schultes & Francisco Lépez 9488 .— 
Comisaria del Vaupés, Rio Guainia basin, Rio Naquieni, vicinity of 
Cerro Monachi. ‘‘Small tree. Flowers red and yellow.’’ June 1948, 
Richard Evans Schultes & Francisco Lépez 10050. 
Quararibea muricata Cuatrecasas sp. nov. 
Arbor parva. Ramuli grisei, rugulosi, juveniles virides, 
pilis stellatis minutis vestiti. Folia mediocria, membra- 
nacea, simplicia, alterna, petiolata, viridia. Petiolus rigi- 
dus, 18-24 mm. longus, teres, supra partem dimidiam in- 
crassatus et profunde striato-rugulosus, basi ampliatus, ru- 
gulosus, adpresse stellato-tomentosus. Lamina elliptico- 
oblonga vel ovato-elliptica, utrinque attenuata, apice 
acuminata, basi obtuse cuneata vel subrotundata, mar- 
gine integra plana, 16-30 cm. longa, 6-10 cm. lata; supra 
glabra costa et nervis secundariis prominulis, reliqua laevis 
nervulis obsoletis; subtus prospectu glabra sed_pilis 
sparsissimis stellatis praecipue ad nervos munita, costa 
crassiuscula eminenti, nervis secundariis sex latere utro- 
que adscendentibus marginem versus arcuato-anastomo- 
satis, nervis tertiariis transversis prominulis remotis cum 
venulis minus conspicuis in reticulum laxum anastomo- 
satis. Flores solitarii, oppositifolii, pedunculati. Pedun- 
culi mediocres, rigidi, ad 18 mm. longi,apicem versus sen- 
sim incrassati, profunde striolato-rugulosi, dense stellato- 
tomentosi, luteolo-virides, parte media apiceque bracteam 
brevem linearem tomentosam 4-8 mm. longam ferentes. 
Alabastra subturbinata, luteolo-viridia, siccitate lutea, 
valde muricata, densissime stellato-tomentosa, 18-30 
mm. longa, 9-10 mm. lata. Calyx luteolo-viridis, tubu- 
losus, basi conicus, crassus, coriaceus, circa 20 mm. altus, 
margine lobis 4 rotundatis vel obtusis, 2-4 mm. profun- 
dis, extus argutissime irregulariterque tuberculato- 
[ 53 | 
