Aponogcton. 



17 



14. A. ulvaceus Bak. in Journ. Linn. Soc. XVIH. (l 881 ) 279; Engl, in Engler's 

 Bot. Jahrb. VIII. (1887) 271; Dur. et Schinz, Consp. Fl. Afr. V. (1894) 493. — Tuber 

 globosum, 1,5 — 2 cm diam. Folia submersa; petiolus plerumque circ. dimidium laminae 

 aequans, usque 25 cm longus, foliis primariis saepe sensim in laminam dilatatus; 

 lamina lineari-oblonga, mera- 



branacea , margine leviter 

 undulata, basi cuneata, utrin- 

 que nervis longitudinalibus 

 pluribus et multis venis 

 tvansversis densissimis minus 

 prominentibus percursa. In- 

 florescentia distachya, densi- 

 flora, circ. 6 cm longa. Tepala 

 2, anguste-ovata , basi con- 

 tracta , tenuia , uninervia, 

 flavescentia , circ. 2,5 cm 

 longa. Stamina 6, longitudine 

 tepala aequantia vel paulo 

 longiora ; filamenta filiformia; 

 antherae parvae, nigrescen- 

 tes (?). Carpidia plerumque 3, 

 rarius 4, quam stamina paulo 

 breviora; ovarium ovoideum, 

 6 — 8-ovulatum, in stilum 

 tenuem subaequilongum con- 

 tractum. — Fig. 5. 



Madagascar: Anka- 

 vatra (Hildebrandt n.3802 

 — Herb. Berlin, Herb. Zürich). 



15. A. Bernierianus 

 (Decne.) Hook. f. in Gen. pl. 

 III. (1883) 1014; Engl, in 

 Engler's Bot. Jahrb. VIII. 

 (1887) 271 ; Dur. et Schinz, 

 Consp. Fl. Afr. V. (1894) 

 492. — Ouvirandra Bernie- 

 rianus Decne. in Delessert, 

 Ic. III. (1837) 62 t. 100; 

 Kunth, Enum. pl. III. (1841) 

 p. 592. — Tuber globosum, 

 circ. 1 ,5 cm diam. Folia sub- 

 mersa, brevipetiolata; petio- 

 lus usque 1,5 dm longus; 

 lamina lineari-oblonga, apice 

 acuta, basi rotundata vel 

 rarius subcordata, 2 dm et 

 ultra longa et medio usque 

 4 cm lata, utrinque 2, rarius 

 3 nervis longitudinalibus et 

 multis venis transversis di- 

 stinete prominentibus percursa, intra nervös parenehymate saepe porosis poris quadratis 

 vel oblongis seriatim pertuso-fenestrata. Pedunculus longus, dimidio superiore in flatus, 

 sed infra inflorescentiam subito contractus; inflorescentia plerumque e spicis laxifloris 

 2 vel rarius 3 — 5, circ. 8 cm longis coinposita. Tepala 2, late-elliptica vel ovata, rosea, 



A. Engler, Das Pflanzenreich. IV. 13. 2 



Fig. 6. Aponogeton Bernierianus (Decne.) Hook. f. A Habitus. 

 B Pars inflorescentiae. CTepaluni. D Carpidium. Ü/Stamen. — 



Icon. origin. 



