Aponogeton. 



19 



Inflorescentia distachya, 5 — 7 cm longa, partibus inferioribus laxiflora, superne densiflora. 

 Tepala 2, tenuia, obovata, basi subtruncata, alba, quam stamina paulo breviora. Sta- 

 mina 6; filamenta circ. 3 mm longa, crassiuscula, subulata, apice subcontracta; antherae 

 parvae, flavae. Carpidia 3; Ovaria ovoidea, stilis crassis brevibus, 2 — 4-ovulata; Ovula 

 basi affixa, adscendentia; fructus abortu 1 — 3 seminibus; semina oblonga, circ. 3 mm 

 longa. — Fig. 7, 8. 



Madagascar: ohne Standort (Hildebrandt n. 31 1 6, Baron n. 1 458), bei Tamatave 

 (Voeltzkow. — Herb. Berlin; Keller — Herb. Zürich). 



Fig. 8. Aponogeton fenestralis (Poir.) Hook. f. A Segmentum folii. B Pars inflorescentiae. 

 C Flos. D Stamen. E, F Tepala. Carpidia. H Carpidium longitudinaliter sectum. — 



Icon. origin. 



17. A. vallisnerioides Baker in Trans. Linn. Soc. XXIX. (1875) 158; Dur. et 

 Schinz, Consp. Fl. Afr. V. (1894) 493; A. Bennett in Th. Dyer, Fl. trop. Afr. VIII. 

 (1901) 218. — Tuber globosum, circ. 5 mm diam. Folia submersa, sessilia, ligulata, 

 membranacea, lineari-lanceolata, apice oblusa, 8—10 cm longa, 4 — 8 mm lata, nervis 

 vix perspicuis. Inflorescentia monostachya, dorsiventralis, densiflora, 2 — 3 cm longa. 

 Tepala 2, oblonga, multinervia, alba, circ. 7 — 8 mm longa et 2 — 3 mm lata. Stamina 6; 

 filamenta filiformia, basi paulum dilatata, circ. y 3 tepalorum aequantia. Carpidia 3; 

 ovarium ovoideum pluriovulatum, in stilum aequilongum contractum; stigma minutum. — 

 Fig. 9 J—M. 



Ostafrikanische Steppenprovinz: Djur, bei Kutshuk Alis Seriba (Schwein- 

 furth n. 1704, 1761); Djur, Seriba Ghattas (Schweinfurth n. 4 266); Bongo, Gir 

 (Schweinfurth n. 2152 — Herb. Berlin). 



18. A. gracilis Schinz in Dur. et Schinz, Consp. Fl. Afr. V. (1894) 492 (nomen 

 nudum) et in Bull. Herb. Boiss. 2. ser. I. (1901) 763; A. Bennett in Th. Dyer, Fl. capens. 

 VII. (1897) 43. — Tuber globosum, circ. 5 mm diam. Folia submersa; petiolus tenuis, 

 8 — 12 cm longus, lamina lineari-oblonga, circ. 1,2 cm longa et 3 — 4 mm lata ; pluribus 

 nervis longitudinalibus subdistinctis. Inflorescentia monostachya, dorsiventralis, laxiflora. 

 Tepala 2, alba, tenuia, uninervia, obovato-oblonga. Stamina 6 ; filamenta filiformia, 

 subulata; antherae parvae, globosae. Carpidia plerumque 3; Ovaria ovoidea in stilum 

 aequilongum vel paulo longiorem contracta, pluriovulata. Semina oblonga, circ. 2 cm 

 longa. — Fig. 9 A — H. 



Transvaal: Houtbosch (Rehmann n. 5761 ; Schlechter n. 4807 — Herb. Zürich). 



19. A. spathaceus E. Meyer in Herb. Drege et in Drege, Zwei pflanzengeogr. 

 Documente (1844) 137; Linnaea XX. (1847) 215; Hook. f. in Bot. Magaz. t. 6399; 

 Engl, in Engler's Bot. Jahrb. VIII. (1887) 272; Dur. et Schinz, Consp. Fl. Afr. V. 

 (189 4) 49 3; Bennett in Th. Dyer, Fl. capens. VII. (1897) 44; Rendle in Cat. Afr. PI. 

 Welw. II. (1899) 94; A. Bennett in Th. Dyer, Fl. trop. Afr. VIII. (1901) 216. — 

 Tuber globosum vel ovoideum, circ. 1 cm diam. Folia submersa, plus minus longe- 

 petiolata; petiolus usque 25 cm et ultra longus, dimidio inferiore tenuis, superne 

 plerumque sensim in laminam dilatatus; lamina tenuis, angustissima , quam petiolus 

 circ. duplo triplove latior, elongato-subulata vel lineari-lanceolata apice acuta, utrinque 

 1 — 2 nervis longitudinalibus subdistinctis percursa, circ. 6 — 8 cm longa et 3 — 6 mm 



2* 



