A REVISION OF PHILIPPINE PIPERACEAE. 
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Eamuli spiciferi fere 3 mm crassi, collenehyma 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. 
Mindanao, District of Davao, Mount Dagatpan, Warburg 14144, in mixed 
forests. 
51. Piper striatum C. DC. in Elm. Leaf!. Philip. Bot. 3 (1910) 772. 
Mindanao, District of Davao, Todaya (Mount Apo), Elmer 11764, September. 
52. Piper oblongibaccum C. DC. 1. c. 773. 
Negros, Dumaguete, Cuernos Mountains, Elmer 8456, March. 
53. Piper Williamsii C. DC. sp. nov. 
Poliis 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 cm supra basin solutus, nervis latera- 
libus subadscendentibus utrinque 2 a basi solutis quorum externi tenuis- 
simi ; petiolo minutissime puberulo basi ima vaginante ; stirpis fern, 
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 umhonatis et 
glabris, stigmatibus 3 vel 4 ovatis et parvis. 
Dioicum, in arboribus scandens. Eamuli glabri, spiciferi 1 mm crassi, 
in 7 mm crassis collenehyma in fasciculos discretos dispositum et haud 
libriforme, fasciculi intramedullares 1-seriati, canalis lysigenis nullus. 
Limbi in sicco membranacei creberrime pellucido-punctulati, usque ad 13 
cm 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 AlleniiC. DC. sp. nov. 
Poliis 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 fern, pedunculo velutino- 
puberulo quam petiolus paullo longiore, spica florente quam folii l im bus 
pluries breviore, cylindrica apice obtusa, rhachi puberula, bracteae glabrae 
pelta rotunda, ovario glabro liber o, stigmatibus 4 linearibus. 
Dioicum. Eamuli juniores velutino-puberuli dein glabri, spiciferi 0.75 
mm crassi, collenehyma in fasciculos discretos dispositum et haud libri- 
