A REVISION OF PHILIPPINE PIPERACEAE. 441 
Ramuli spiciferi fere 3 mm crassi, collenchyma continuum §haud 
libriforme cellulis fuscis intermixtum ; fasciculi intramedullares 1-seriati, 
canales lysigenes plures quorum unus centralis alii peripherici. Limbi 
in sicco membranacei minute pellucido-punctulati, fere usque ad 20 cm 
longi et ad 8.5 cm lati. Petioli usque ad 12 mm longi. Pedunculi in 
specimine juveniles quam petioli paullo breviores, spicae vix 1 cm longae 
verisimiliter masculae. 
MinDANaAo, District of Davao, Mount Dagatpan, Warburg 14744, in mixed 
forests. 
51. Piper striatum C. DC. in Elm. Leafl. Philip. Bot. 3 (1910) 772. 
Minpanao, District of Davao, Todaya (Mount Apo), Elmer 11764, September. 
52. Piper oblongibaccum ©, DC. 1. ¢. 773. 
Necros, Dumaguete, Cuernos Mountains, Hlmer 8456, March. 
53. Piper Williamsii C. DC. sp. nov. 
Foliis modice petiolatis, rotundato-ovatis basi aequilatera rotundatis 
apice acute acuminatis, supra glabris subtus tantum ad nervos minutis- 
sime puberulis, 9-ninerviis nervo centrali nervos adscendentes utrinque 
2 mittente quorum supremus a 2.5 em supra basin solutus, nervis latera- 
libus subadscendentibus utrinque 2 a basi solutis quorum externi tenuis- 
simi; petiolo minutissime puberulo basi ima vaginante; stirpis fem. 
-pedunculo glabro quam petiolus multo breviore, spica quam folii limbus 
pluries breviore, matura elliptica, rhachi glabra, bractea rotunda sub- 
sessili glabra, baccis inferne in rhachi immersis superne umbonatis et 
glabris, stigmatibus 3 vel 4 ovatis et parvis. 
Dioicum, in arboribus scandens. Ramuli glabri, spiciferi 1 mm crassi, 
in 7 mm crassis collenchyma in fasciculos discretos dispositum et haud 
libriforme, fasciculi intramedullares 1-seriati, canalis lysigenis nullus. 
Limbi in sicco membranacei creberrime pellucido-punctulati, usque ad 13 
em longi et 9 cm lati. Spica matura in sicco 3 cm longa et 12 mm 
crassa, fuscescens, bracteae pelta 1 mm diametro. Stigmata in apice 
baccae sessilia. 
MINDANAO, District of Davao, Santa Cruz, Williams 2750, April. 
54. Piper Allenii C. DC. sp. nov. 
Foliis parvis modice petiolatis, ovato-ellipticis basi ima leviter in- 
aequilatera acutis apice acute acuminatis, supra glabris subtus velutino- 
puberulis, 7-plinerviis, nervo centrali nervos adscendentes 2 alternatim 
mittente quorum supremus a 1 cm supra basin solutus, nervis lateralibus 
adscendentibus utrinque 2 a basi solutis; stirpis fem. pedunculo velutino- 
puberulo quam petiolus paullo longiore, spica florente quam folii limbus 
pluries breviore, cylindrica apice obtusa, rhachi puberula, bracteae glabrae 
pelta rotunda, ovario glabro libero, stigmatibus 4 linearibus. 
Dioicum. Ramuli juniores velutino-puberuli dein glabri, spiciferi 0.75 
mm crassi, collenchyma in fasciculos discretos dispositum et haud libri- 
_’ h6UThc +. * 
