Placodiscus. 811 



quam ventralis paullo majore, interdum conferruminatae, brunneae, amylum et tan- 

 ninum foventes; radicula ad seminis basin brevissima, papilliformis. 



Frutices vel arbores, praeter inflorescentias subglabrae. Folia sparsa, abrupte 

 pinnata, 2 — 9-juga, petiolata vel sessilia, exstipulata, foliolis infimis vero interdum 

 stipulas mentientibus; foliola subopposita vel alterna, ex oblongo lanceolata vel linearia 

 cuneatave, acuminata vel cuspidata, ad 25 cm longa 8 cm lata, deorsum decrescentia, 

 breviter petiolulata, integerrima, subcoriacea, nervis lateralibus tenuibus subtus convexe 

 prominentibus, arcte prominenter reticulata, glabra nee nisi pilis raris et in paucis 

 glandulis quoque stipitatis subtus adspersa, plerumque utrinque nitida, sicca subfusca, 

 crystalla pauca in staurenehymate et sub nervis (vix sub venis) gerentia, cellulis secre- 

 toriis nullis, epidermide non mucigera e cellulis parvis tota superficie punetatis praeser- 

 tim paginae superioris ^ reetangularibus conflata, paginae inferioris stomata gerente 

 figura orbiculari et vestibulo parvo punetiformi insignia. Thyrsi e trunco vel ramis 

 vetustioribus erumpentes, spieiformes, singuli vel pauci fasciculati vel ramis ex infima 

 basi orientibus fasciculos mentientes, plerumque valde elongati (ad 42 cm longi), sat 

 dense cymulas (cincinnos sessiles vel dichasia in cincinnos abeuntia glomeruliformia) 

 gerentes, interdum (cymulis ad flores singulos reduetis) depauperati et in spicas trans- 

 formati, rhachi sulcata et angulosa minutim puberula vel tomentella glandulisque in 

 nonnullis obsita apice bractearum coma terminata; bracteae bracteolaeque parvae, 

 subulatae; pedicelli perbreves, basi articulati; alabastra subglobosa vel breviter conica 

 turbinatave. Flores medioeres, circ. 4 mm longi, 2,5 mm lati. Fructus majusculi, ad 

 3,5 cm longi, 3 cm lati. 



Species 10, quarum 9 Africam tropicam occidentalem inhabitant, 1 orientalem. 



Genus inter affinia africana Tribus V. excellens floribus regularibus apetalis, calyce 5-dentato, 

 staminibus 8 in alabastro floris <$ plerumque bis genuflexis nee non foliorum reticulatione areta 

 eorumque epidermide per totam cellularum superficiem (externam) punetulata, insuper stomatum 

 figura orbiculari. 



Gonspectus specierum. 

 A. Eglandulosae. 



a. Folia sessilia, 2-juga, foliolis inferioribus stipulas aemu- 



lantibus; discus hirtöllus (sp. guineensis) 1. P.pseudoslipularis. 



b. Folia petiolata. 



aa. Discus dense pilosus; foliola latiuscula (vix triplo 



longiora quam lata). 



a. Inflorescentia spicata, rhachi cymularum loco 

 flores singulos sessiles gerente; alabastra globosa; 

 discus dense pilosus; folia 3 — 4-juga, foliola ellip- 

 tico- vel oblongo-lanceolata, caudato-acuminata, 

 supra sublaevia, subtus laxiuscule inaequaliter 

 reticulata (sp. gabonensis) 2. P. caudatus. 



ß. Inflorescentia thyrsoidea,' rhachi cymulas sessiles 

 paucifloras gerente; alabastra ovoideo-conica; dis- 

 cus ochraeeo-tomentosus ; folia 3 — 5-juga, foliola 

 elliptico-oblonga, acuminata, utrinque subtiliter 

 arcte reticulata (sp. amanica) 3. P. amaniensis. 



y. Inflorescentia thyrsoidea, rhachi cymulas sessiles 

 multifloras cum rhachi confluentes gerente; ala- 

 bastra subglobosa; discus subfusco-pubescens; 

 folia 2 — 5-juga, foliola elliptica, acuminata, utrin- 

 que insigniter arcte reticulata (sp. kamerunensis) . 4. P. leptostaehys. 

 bb. Discus glabriusculus ; foliola angusta (certe triplo, 



saepius sextuplo longiora quam lata). 



a. Inflorescentia thyrsoidea, rhachi cymulas mani- 



