NO. 12 BEGONIACEAE CENTRALI-AMERICANAE — DE CANDOLLE 3 



Folia alterna. Limbi in sicco membranacei oblique 17 cm. longi et 

 usque ad 19 cm. lati, stomata sparsa, cellulae spiculares et cysto- 

 sphaeria crebra. Petioli 2-5 cm. longi. Scapus usque ad 54 cm. 

 longus, floris masc. sepala 9 mm. longa et 6 mm. lata, antherae 

 2.5 mm. longae, capsulae 8 mm. longae, ala maxima 2.5 cm. longa et 

 1.2 cm. lata, semina elliptica. 



Panama: Cerro de Garagara, Sambu Basin, southern Darien, 

 alt. 500-974 m., H. Pittier 5672. 



5. BEGONIA BREVICYMA C. DC, n. sp. 



Omnino glabra ; f oliis e rhizomate longe petiolatis, limbo rotundato 

 basi cordato apice acuminato superne utrinque 1-2-dentato caeterum 

 margine integro, palmatinervio ; scapo e rhizomate surgente folia 

 superante apice breviter cymifero, cyma pauciflora quam scapus 

 pluries breviore, floribus magnis; floris masc. sepalis 2 obovatis 

 integris, petalis 2 obovatis integris, staminibus numerosis toro in- 

 sertis, antheris oblongo-obovatis filamenta fere aequantibus. 



Limbi in sicco membranacei 9.5 cm. longi latique, stomata facie 

 infera sparsa vel binata, cystolitha haud crebra. Scapus usque ad 

 cymam 25 cm. longus, cyma 3 cm. longa, bracteae ovatae integrae 

 subtus glandulis conspersae 1 cm. longae et 8 mm. latae. Floris 

 masc. in vivo albi sepala 17 mm. longa et usque ad 12 mm. lata, 

 petalaque 15 mm. longa et usque ad 10 mm. lata subtus glandulis 

 conspersa, stamina numerosa in sicco rubra, antherae 15 mm. longae 

 rimis dehiscentes ; flores f eminei ignoti. 



Panama: Humid forest around Los Siguas Camp, southern 

 slope of Cerro de la Horqueta, Chiriqui, alt. about 1700 m., W. R. 

 Maxon 5417. 



6. BEGONIA MUCRONISTIPULA C. DC, n. sp. 



Omnino glabra ; foliis e rhizomate longe petiolatis, stipulis oblongo- 

 ovatis paullo infra apicem dorso mucronatis, limbo transverse reni- 

 formi basi cordato apice acute acuminato margine integro vel 

 superne tridentato, palmatinervio ; scapo e rhizomate surgente quam 

 folia multo longiore apice cymigero, cyma dichotome ramosa pauci- 

 flora, floribus sat longe pedicellatis ; floris masc. sepalis 2 rotundatis 

 integris, petalis 2 obovatis integris quam sepala multo minoribus, 

 staminibus liberis, antheris oblongo-obovatis quam filamenta longi- 

 oribus; floris fern. 3-lobi lobis 2 externis rotundatis integris, tertio 

 obovato multo minore, ovario 3-loculari, placentis bipartitis lamellis 

 utrinque ovuliferis, stilis 3 basi connatis bifidis sub laciniis inflatis et 



