296 F - Pax - — Euphorbiaceae-Phyllanlhoideae-Phyllantheae-Paivacusinae. 



2. Aristogeitonia Prain. 



Aristogeitonia*) Prain in Kew Bull. (1908) 438; in Hook. Icon. pl. XXX. (1911) 

 t. 2926, in Fl. Trop. Afr. VI. 1. (1912) 625; Pilger und Krause in Engler u. Prantl, 

 Pflzfam.Nacb.tr. IV. (19 15) 171. 



Flores monoici, apetali. Sepala q? 6, biseriata, imbricata. Stamina 14 — 15, disco 

 crasso, plicato inserta; filamenta libera, elongata; antherae longitudinaliter extrorsum 

 dehiscentes. Ovarii rudimentum nulluni. Calyx Q ut in flore q?. Discus hypogynus 

 annularis, crenatus. Ovarium 3-loculare; styli breves, cordati, crassi, basi breviter con- 

 nati. Ovula in loculis gemina. Capsula in coccos bivalves a columella persistente dis- 

 siliens; endocarpium crustaceum. Semina in loculis saepe solitaria, triquetra, nitida, 

 ecarunculata ; albumen carnosum; cotyledones latae, planae, crassiusculae. — Arbor. 

 Folia petiolata, alterna, 1 — 3-foliolata; foliola subsessilia, coriacea, integra, penninervia, 

 bistipulata. Flores utriusque sexus in ramulis pulviniformibus secus ramos annotinos 

 vel in axillis foliorum fasciculati. 



Species unica africana. 



A. limoniifolia Prain in Kew Bull. (1908) 438; in Hook. Icon. pl. XXX. (1911) 

 t. 2926, in Fl. Trop. Afr. VI. 1. (1912) 626. — Arbor; ramuli juveniles fulvo-tomen- 

 tosi, deinde glabrescentes , irregulariter striati, grisei. Petiolus longitudine variabilis, 

 1 — 5 cm longus, puberulus, glabrescens; foliola 3 — 9 cm longa, 1 */ 2 — * cm lata, late- 

 ralia minora, lanceolata, acuta vel obtuse acutata, basi acuta vel subacuta, glabra, supra 

 nitida, subtus pallidiora; costae secundariae utrinque 8 — 1 2, parum prominentes; stipulae 

 subulatae, 3 — 6 mm longae. Pedicelli q 1 3 mm longi. Calyx 2 mm latus. Sepala 

 ovata, acuta, interiora tenuiora et angustiora, pilosa; stamina exserta. Calyx Q ut in 

 flore cT. Capsula 1 2 mm longa et lata. Semina 8 mm longa, 5 mm lata, badia. 



Westafrikanische Waldprovinz: Angola, Loanda (Gossweiler n. 457!). 



3. Paivaeusa Weiw. 



Paivaeusa**) Welw. ex Benth. in Benth. et Hook. f. Gen. I. (1867) 993; Oliv, in 

 FL Trop. Afr. I. (1868) 328; in Transact. Linn. Soc. XXVII. (1869) 20; Baill. Lust. 

 pl. V. (1874) 311; Pax in Engler u. Prantl, Pflzfam. III. 5. (1890) 456; Prain in Fl. 

 Trop. Afr. VI. 1. (1912) 626.« 



Flores dioici, apetali. Sepala q? 5 — 8, zb inaequalia, imbricata. Stamina 6—8, 

 disco extus inter lobos affixa; filamenta libera, elongata; antherae dorsifixae, longitudina- 

 liter extrorsum dehiscentes. Discus centralis x crassus, plicatus. Calyx Q ut in flore rj*. 

 Discus hypogynus annularis, crenatus. Ovarium 2-loculare; Stigmata 2, breviter slipi- 

 tata, reniformia, breviter 4-loha. Ovula in loculis 2. Capsula obovoidea, sligmate per- 

 sistente coronata. Semina in loculis 1 — 2, compressa, carunculata; albumen parcum; 

 embryo viridis; cotyledones latae, planae. — Arbor parva, pubescens. Folia alterna, 

 longe petiolata, digitatim 5 — 7-foliolata; foliola subsessilia, integra. Flores q* in in- 

 florescentias capituliformes, breviter pedunculatas dispositi, Q solitarii vel subfasciculati, 

 utriusque sexus ad apicem ramulorum cicatricosorum siti. 



Species unica africana. 



P. dactylophylla Welw. ex Oliv, in Fl. Trop. Afr. I. (1867) 328; in Transact. 

 Linn. Soc. XXVII. (1869) 21, t. 7; Pax in Engler, Hochgebirgsfl. Afr. (1892) 282; in 

 Baum, Kunene-Sambesi Exp. (1903) 282; Hiern, Cat. Welw. Afr. pl. I. (1900) 963; 

 Prain in Fl. Trop. Afr. (1912) 62 6. — Arbor resinosa, 2V 2 — 10 m alta; ramuli crassi, 

 griseo-pubescentes, juveniles rufo-vestili. Petiolus 4 — 10 cm longus, pubescens, demum 

 glabrescens; foliola 5, rarius 7, 6 — 15 cm longa, 3 — ö 1 ^ cm lata, oblanceolala vel 

 obovato-oblonga, obtusa, emarginata vel breviter acutata, basin versus euneato-angustata, 



*) ydxiov = vicinus, i. e. vicinus optimus. — l'l^iGxoytUiov atheniensis, qui cum Har- 

 rnodio Hipparchum neeavit. 



**) Genus dicatum cl. Baräo do Castello de Paiva, botanices in academia Portensi 

 professori, Faunae malacologicae maderensis etc. fortunato exploratori. 



