52 (118) 



endocarpii sclerenchymate alas plus minus iiigrediente, sed non vel vix paullulum bipartibili, 

 alis igitur nunquam evanescentibus; semina e trigono ellipsoidea, haud raro pilosiuscula, 

 arillo dorso fisso usque ad medium obtecta; embryo oleoso-farinosus , cotyledonibus crassis, 

 plerumque parum curvatis, rima subtransversali superpositis ; üores teneri, sepalis mem- 

 branaceis, interioribus petaloideis, omnibus liberis; thyrsi haud raro glomeratim vel fasci- 

 culatim aggregati; corpus lignosum in nonnullis compositum e centrali majore et peri- 

 phericis plerumque 3 (P. trilatera, monogi/na, hymenobractea) rarius 1 (P. mallophylla); 

 folia raro ternata (P. ternata, monogyna), in nonnullis biternata (P. enneaphylla, fusces- 

 cens, barbadensis, selenoptera), plerumque 5-foliolato-pinnata vel subbipinnata, in 1 tantum 

 specie (P. australis, dubitanter huc relata) supradecomposita, petiolo nudo, rhachi in non- 

 nullis subalata, stipulis interdum magnis dilatatis scariosis vel foliaceis; foliola glandulis 

 plerumque curvatis vel geniculatis ornata; epidermis in paucis (quae sunt P. fuscescens, 

 barbadensis, monogyna, hymenobractea, triptera) mucigera, in plurimis non mucigera. 

 (Species per totam generis ditionem dispersae. Nonnullae — P. mallophylla, hymenobractea 

 et australis — ob fructum ignotum non nisi plus minus dubitanter hie insertae; P. gi- 

 ganteae et P. tenerae fructus e descriptione incompleta tantum noti.J 



A. Capsulae alae angustiores, basi angustatae 



a. Corpus lignosum compositum; thyrsi ad foliorum axillas glomeratim congesti; 

 foliorum rbachis submarginata 



aa. Folia 5-foliolato-pinnata (caulis exacte et acute triangularis, ad angulos 

 breviter jubato-pilosus ; Capsula longius stipitata; semen pilosum; sp. brasi- 

 Jiensis) 81. P. trilatera Radlk. 



bb. Folia trijuga, jugo infimo ternato (fructus ignotus;' sp. centroamericana) 



82. P. mallophylla Radlk. 



b. Corpus lignosum simplex 



aa. Thyrsi glomeratim vel (pauciores) fasciculatim congesti 

 a. Capsula estipitata vel subestipitata 



aa. Folia ternata (thyrsi ad nodos vetustos mediocres , Capsula 

 subestipitata; semen glabrum; sp. brasiliensis) 



83. P. ternata Radlk. 



ßß. Folia subbipinnata, 3 — 5-juga, jugo infimo 5-foliolato-pinnato 



vel ternato (in P. apoda partim depauperato simplici; thyrsi 



perbreves ad nodos vetustos vel ad foliorum axillas quoque) 



* Stipulae parvulae; foliorum rhachis superne marginato- 



alata; Capsula ellipsoidea vel breviter obovoidea 



f Grlabra; foliola ovata, subintegerrima (semen pilo- 



sum; sp. venezuelana) . 84. P. cauliflora Jacq. 



ff Hirtella ; foliola lanceolata , acuminata , serrato- 



dentata (semen pilosum ; sp. venezuelano-panamensi- 



mexicana) . . . 85. P. glomerulosa Radlk. 



fff Setosa; foliola lineari-Ianceolata (semen glabrum? 



sp. peruviana) .... 86. P. tenera Poepp. 



** Stipulae maximae , scariosae; foliorum rhachis nuda; 



Capsula cuneata (foliola oblonga vel elliptica ; semen 



glabrum; sp. novogranatensis) . 87. P. apoda Radlk. 



ß. Capsula stipitata; folia subbipinnata, rhachi superne marginato-alata 



aa. Thyrsi breves, ad nodos defoliatos glomerati (glabra; stipulae 



falcatae, reflexae; folia 3 — 5-juga, jugo infimo ternato; semen 



pilosum; sp. peruviana) ... 88. P. fistulosa Radlk. 



