111 



A. Capsula triquetra, e lanceolato obovata, densius laxiusve setoso-hirsuta; stipulae scariosae, 

 magnae, ovato-lanceolatae vel suborbiculares, saepe lacerato-dentatae; folioruin rhachis 

 alata Tel nuda, foliola mucronulato- vel subspinuloso-dentata 



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

 instructa; stipulae ovato-lanceolatae 21. P. rubiginosa Camb. 



b. Rami in costis tantum setis robustioribus criniti, sulcis glabris; foliola fibris 

 selerenchymaticis vix ullis instructa; stipulae suborbiculares vel ovatae, firnbriato- 

 dentatae 22. P. stipularis Benth. 



B. Capsula trigona, ellipsoidea vel subglobosa, tomento brevi longioreve adpresso induta; 

 stipulae minores, lanceolato-subulatae 



a. Rami tbyrsigeri pluri-costati ; foliola argute serrata, chartacea, fibris selerenchyma- 

 ticis raris instructa; Capsula tomento subvilloso rufo adpresso induta 



aa. Foliorum rhachis alata 23. P. seminuda Radlk 



bb. Foliorum rhachis nuda 24. P. castaneifolia Radlk 



b. Rami thyrsigeri teretiusculi; foliola reinote obtuso-dentata vel subintegerrima 

 coriacea, fibris selerenchymaticis crebrioribus instructa 



aa. Foliola praesertim apice paueidentata, in acumen obtusum protraeta; thyrsi 

 dense cincinnigeri; Capsula lanceolata, adpresse canescenti-tomentella (sp 

 guianensis) 25. P. stenopetala Sagot 



bb. Foliola subintegerrima, acuta; thyrsi interrupte cincinnigeri; Capsula depresse 

 trigona, ferrugineo-tomentosa 26. P. interrupta Benth. 



Sectio III. Pleurotoeclius Kadlk. 11. cc. Capsula exalata, globosa, ellipsoidea vel ovoidea, 

 saepius stipitata, pube varie induta vel glabra, mesocarpio parenehymatico paucinervi, endo- 

 carpio minus tenaci, Capsula sicca inde crustacea, fragilis, reticulato-venosa et nervis val- 

 varum marginalibus vel medianis quoque magis prosilientibus longitudinaliter tri — sex- 

 costata (unde sectionis nomen; cf. Fig. III); semina e subtrigono ovoidea, obovoidea, vel 

 subglobosa, glabra, arillo dorso plus minus fisso basi tantum (P. Cupana) vel usque ad 

 medium, rarius altius (P. parvibractea , rugosa, subcordata, ferruginea) vel vix ullo 

 (P '. Sonorensis) obteeta; embryo nunc oleosus tumque cotyledonibus (interiore certe) tenuioribus 

 et ut illae Serjaniarum plicato-curvatis (P. tomentosa etc., cf. conspectum sub A et B, a), 

 nunc oleoso-farinosus, cotyledonibus crassis parum curvatis et oblique superpositis (P. con- 

 naracea et illae in conspectu sub B, b enumeratae) ; flores minores vel robustiores, sepalis 

 teneris vel subcoriaeeis tumque (praesertim interioribus) tomentellis, omnibus liberis vel 3. 

 et 5. basi vel infra medium connatis (P. connaracea) ; thyrsi solitarii vel paniculatim con- 

 gesti; corpus lignosum simplex; folia in una (P. urvilleoiäes) ternata, in plurimis 5-foliolato- 

 pinnata, in paucis biternata (P. lachnocarpa, jamaicensis, costaricensis) , petiolo raro, 

 rhachi interdum alata, stipulis in nonnullis insignioribus ; foliola plerumque glandulis curvatis 

 vel geniculatis, in nonnullis (P. laeta, bidentata, subauriciäata) glandulis depressis flabelli- 

 formibus vel (in P. connaracea) subscutatis subimmersis ornata, in pluribus fibris seleren- 

 chymaticis brevibus prope paginam superiorem (partim inter staurenehymatis cellulas pro- 

 trusis) instructa (cfr. sp. n. 33 — 35: P. bidentata, subauriciäata, connaracea et sp. 

 n. 39 — 47 in conspectu sub B, b enumeratae); epidermis in aliis mucigera (cf. conspectum 

 sub A et B, a), in aliis non mucigera (cf. conspectum sub B, b), paginae inferioris in sola 

 P. fusiformi crystallophora. (Species plurimae brasilienses vel certe Americae meridionnlis 

 continentalis incolae, una antillana, paucae centroamericanae vel mexicanae.) 



