sinuata, lobo maximo ab insertione petioli usque ad api- 
cem 85 cm. longo, 15 em. lato, lobo minimo 14 cm. 
longo, 8 cm. lato, parte centrali concrescenti 7-13 cm. ; 
supra viridis, scabra, pilis conicis minutis satis atque 
tuberculis acutis et pilis sparsis longis praedita, nervis 
primariis secundariisque valde conspicuis; subtus alba, 
nervis principalibus in foliis juvenilibus tomento arach- 
noideo deciduo deinde sparse hirtis, nervis secundariis 
prominentibus, adscendentibus, 1-2 cm. distantibus, 
plusminusve arachnoideis et sparsissime hirtulis vel gla- 
brescentibus, reticulo venularum obsoleto et lamina re- 
liqua tomento arachnoideo albo dense tecta. Stipula in 
statu juvenili 8 cm. longa, acuta, villoso-hirta, margine 
utrinque glabra, intus villoso-sericea. Inflorescentiae 
femineae geminatae. Pedunculus 6-8 cm. longus (fructi- 
fer usque ad 17 em. longus) scabrido-hirtulus, tuberculis 
minutis atque pilis rigidis fragilibus patentibus rectis et 
hamatis munitus. Spatha cylindrica, apice longe angus- 
tata, acuta, 16 cm. longa, extus sparse puberula et arach- 
noidea, leviter scabrida, intus pubescenti-arachnoidea. 
Amenta feminea vulgo 5 vel 6 (4-7), leviter pedicellata, 
11 cm. longa, 4 mm. lata, fructifera in sicco usque ad 
23 cm. longa, 7-8 mm. crassa. Perigonium minute tu- 
berculatum. Achaena elliptica, 2 mm. longa, 1 mm. 
lata, laevia. Pedicelli crassi, 3-4 mm. longi, scabri, pilis 
conicis brevibus et pilis longioribus hamatis instructi. 
Concerning the relationship of this new species, Cua- 
trecasas writes: ‘‘Cecropia porvenirensis is closely related 
to C. marginalis Cuatr., but it differs by having the upper 
surface of the leaves very scabridous, the under surface 
more densely white-arachnoideous with the nerves much 
less hispid, and the lower part of the petiole with hooked 
hairs; the amenta are pedicellate, longer and usually five 
or six, while in C. marginals they appear in groups of 
four and are sessile. The stipule of Cecropia porveniren- 
[ 26 | 
