Paullinia. 227 



Sect. IL Diphtherotoechus Radlk. 11. cc. — Capsula exalata, acute triangularis vel 

 triquetra, lanceolata vel obovata, estipitata, varie vestita, saepius setoso-hirsuta, 

 mesocarpio parenchymatico paucinervi, endocarpio tenaci e cellulis sclerenchymaticis 

 elongatis exstructo, Capsula sicca inde chartaceo-coriacea (unde nomen: diqr&EQa, 

 corium) vel subcrustacea, reticulato-nervosa (cf. Fig. 5); semina breviter ellipsoidea, 

 subtrigona, glabra, arillo dorso fisso usque ad medium obtecta; embryo oleoso- 

 farinosus, cotyledonibus crassis oblique superpositis; flores sat parvi, teneri, sepalis 

 interioribus petaloideis, omnibus liberis; thyrsi solitarii vel paniculatim congesti; 

 corpus lignosum simplex; folia 5-foliolato-pinnata, petiolo nudo, rhachi saepius alata, 

 stipulis interdum magnis dilatatis lacerato- vel fimbriato-dentatis scariosis; foliola 

 interdum subspinuloso-dentata, in omnibus speciebus fibris sclerenchymaticis brevi- 

 bus (in P . steno petala et interrupta crebrioribus) prope paginam superiorem instructa, 

 glandulis geniculatis vel malleoliformibus ornata; epidermis non mucigera. (Species 

 brasilienses, 1 guianensis.) 



A. Capsula triquetra, e lanceolato obovata, densius laxiusve 

 setoso-hirsuta; stipulae scariosae, magnae, ovato-lanceo- 

 latae vel suborbiculares, saepe lacerato-dentatae; foliorum 

 rhachis alata vel nuda, foliola mucronulato- vel sub- 

 spinuloso-dentata. 



a. Rami undique hirto-tomentosi vel setosi; foliola fibris 

 sclerenchymaticis sat raris instructa; stipulae ovato- 



lanceolatae 27. P. rubiginosa. 



b. Rami in costis tantum setis robustioribus criniti, sulcis 

 glabris; foliola fibris sclerenchymaticis vix ullis in- 

 structa; stipulae suborbiculares vel ovatae, fimbriato- 



dentatae 28. P. stipularis. 



B. Capsula trigona, ellipsoidea vel subglobosa, tomento brevi 

 longioreve adpresso induta; stipulae minores, lanceolato- 

 subulatae. 



a. Rami thyrsigeri pluri-costati; foliola argute serrata, 

 chartacea, fibris sclerenchymaticis raris instructa; 

 Capsula tomento subvilloso rufo adpresso induta. 



aa. Foliorum rhachis alata 29. P. seminuda. 



bb. Foliorum rhachis nuda 30. P. castaneifolia. 



b. Rami thyrsigeri teretiusculi; foliola remote obtuso- 

 dentata vel subintegerrima, coriacea, fibris sclerenchy- 

 maticis crebrioribus instructa. 



aa. Foliola praesertim apice paucidentata, in acumen 

 obtusum protracta; thyrsi dense cincinnigeri; Cap- 

 sula lanceolata, adpresse canescenti-tomentella (sp. 

 guianensis) 31. P. stenopetala. 



bb. Foliola subintegerrima, acuta; thyrsi interrupte 

 cincinnigeri; Capsula depresse trigona, ferrugineo- 

 tomentosa 32. P. interrupta. 



Sect. III. Pleurotoechus Radlk. 11. cc. — Capsula exalata, globosa, ellipsoidea vel 

 ovoidea, saepius stipitata, pube varie induta vel glabra, mesocarpio parenchymatico 

 paucinervi, endocarpio minus tenaci, Capsula sicca inde crustacea, fragilis, reticulato- 

 venosa et plerumque nervis valvarum marginalibus vel medianis quoque magis 

 prosilientibus longitudinaliter tri— sex-costata (unde sectionis nomen; cf. Fig. 5); 

 semina e subtrigono ovoidea, obovoidea, vel subglobosa, glabra, arillo dorso plus 

 minus fisso basi tantum (P. upana) vel usque ad medium, rarius altius (P. parvi- 

 bractea, rugosa, subcordata, ferruginea), immo tota (P. bilobulata), raro vix ullo (P. 



16* 



