NO. 6 NEW SPECIES OF PIPER FROM PANAMA CANDOLLE 1 3 



Panama : Humid forest around Los Siguas Camp, southern slope 

 of Cerro de la Horqueta, Chiriqui, alt. about 1,700 m., W. R. Maxon 

 5421 (type) ; H. Pittier 3185. Forests along- the Rio Ladrillo and 

 vicinity, above El Boquete, Chiriqui, alt. 1,200-1,300 m., Maxon 5395. 



PIPER CHAMISSONIS Steud., (3 RUBELLIBRACTEUM C. DC, n. var. 



Limbo usque ad 17 cm. longo et 6.2 cm. lato, bractea rubelle punc- 

 tata, bacca vertice velutina. 



Panama: Forests around El Boquete, Chiriqui, alt. 1,000-1,300 

 m., H. Pittier 2899. 



PIPER SAMBUANUM C. DC, n. sp. 



Ramulis glabris ; foliis brevissime petiolatis glabris, limbo ellip- 

 tico-lanceolato basi ima leviter inaequilatera utrinque acuto sub- 

 acutove, apice obtuse et sat longe acuminato, nervo centrali nervos 

 adscendentes utrinque 5 mittente quorum infimus aliis multo brevior 

 et tenuior, supremus circiter a medio' centralis solutus, petiolo basi 

 ima vaginante ; pedunculo glabro petiolum paullo superante, spica 

 florente limbi dimidium fere aequante apice mucronulata, rhachi 

 hirtella, bractea pelta triangulari margine pedicelloque angusto hir- 

 sutis, antheris rotundatis quam filamenta multo brevioribus, ovario 

 glabro', stigmatibus linearibus. 



Ramuli spiciferi 2 mm. crassi, collenchyma in fascicules discretos 

 dispositum, zona interna libriforme, fasciculi intrameduHares 

 i-seriati, cellulae fuscescentes in cortice et in medulla creberrimae. 

 Limbi in sicco firmi minute pellucido-punctulati, 15-16 cm. longi, 

 5-6.5 cm. lati. Petioli usque ad limbi latus longius 6 mm., inter 

 limbi latere fere 2 mm., pedunculi 10 mm. longi. Spicae florentes 

 9 cm. longae et fere usque ad 2 mm. crassae. Stamina 4 basi ima 

 baccae adnata. Stigmata 3 sessilia. 



Panama: Foothills of Garagara, Sambu Basin, southern Darien, 

 alt. 30-500 m., H. Pittier 5663 (type), 5726. 



PIPER CALLIBRACTEUM C DC, n. sp. 



Ramulis glabris albido-verruculosis ; foliis modice petiolatis gla- 

 bris, limbo ovato-lanceolato basi leviter inaequilatera utrincjue acuto, 

 apice acute et longe acuminato, nervo centrali nervos adscendentes 

 utrinque 5 mittente quorimi supremus fere a medio centralis solutus, 

 petiolo basi ima vaginante albido-verruculoso ; pedunculo glabro 

 petiolum fere aequante, spica matura limbi dimidium superante apice 

 mucronata rhachi glabra, bracteae pelta triangulari dorso in callum 



