Aponogetonaceae 



von 

 K. Krause mit Unterstützung von A. Engler. 



(Gedruckt im Oktober 1905.) 



{Aponogetonaceae (» Aponogetaceae*) Planen, in Ann. sc. nat. 3. ser. I. (1844) 107; 



Engler in Engler's Bot. Jahrb. VIII. (1887) 261 et in Engl, et Prantl, Pflzfam. II. 1. (1889) 



218; Dur. et Schinz, Consp. Fl. Afr. V. (1894) 491. — Aponogetoneae Benth. et Hook. f. 



Gen. III. (1883) 1013; Baill. Hist. pl. XII. (1894) 99). 



Wichtigste Litteratlir. Morphologie und Systematik: Cl. Richard, Analyse 

 du fruit (1808). — A. de Jussieu in Ann. sc. nat. 2. ser. XI. (1839) 345. — 

 Planchon in Ann. sc. nat. 3. ser. I. (1844) 107. — Edgeworth in Hook. Lond. 

 Journ. III. (1844) 402 t. 1 7 et 18. — Engler in Engler's Bot. Jahrb. VIII. (1887) 

 261 et in Engl, et Prantl, Pflzfam. II. 1. (1889) 218. 



Anatomie: Duval-Jouve, Diaphragmes vasculiferes des Monocotyledones aquati- 

 ques, in Mem. de l'Acad. de Montpellier 1873. — Engler in Engl, et Prantl, Pflzfam. 

 II. 1. (1889) 218. 



Character. Flores actinomorphi, hermaphroditi vel rarius (abortu?) dioeci. Peri- 

 gonii tepala plerumque 2, rarius 1 vel 3, aequalia vel interdum subinaequalia, obovata 

 vel oblonga, tenuia, colorata — alba, rosea aut violacea aut flavescentia aut rarissime 

 viridescentia — persistentia vel deeidua. Stamina 6' in verticillis 2, rarius plura in 

 verticillis 3 — 4, hypogyna; filamenta libera, filiformia vel crassiuscula, subulata; antherae 

 parvae, subglobosae vel ellipsoideae, vulgo flavescentes, basi affixae, biloculares, lateraliter 

 2-rimosae. Carpidia libera, verticillata, in floribus hermaphroditis plerumque 3, rarius 

 4 — 5, in floribus femineis 6 — 8. Ovaria sessilia, unilocularia, ovoidea vel rarius lageni- 

 formia, plerumque in stilum tenuem, persistentem, brevem vel subelongatum, intus sul- 

 catum, superne stigmatosum contraeta; Ovula 2 — 8, basi vel sutura ventrali 2-seriatim 

 affixa, adscendentia, anatropa; stigma diseoideum vel lineare, breviter decurrens. 

 Fructiculi tot quot Ovaria, rostrati, elongati vel inflati, dehiscentes, semina 4 — 8, haud 

 raro pauciora includentes. Semina ereeta, oblonga vel cylindracea, exalbuminosa, testa 

 herbacea vel carnosa, interdum costata, cellulis continuis vel stratis binis composita, 

 embryo rectus, elongatus, compressus vel cylindraceus ; cotyledo magna, crassa, plumula 

 plerumque in sinu ventrali infra medium inserta. 



Herbae aquaticae, submersae vel lamina foliorum natantes, perennes, glaberrimae, 

 rhizomate tuberoso, interdum stolonifero. Tuber plerumque rotundato-globosum, rarius 

 ellipsoideum vel elongatum, radieibus fibrosis multis instruetum. Folia basalia, plus 

 minus longepetiolata , rarissime sessilia, basi vaginantia; lamina oblonga vel lineari- 

 lanceolata, interdum natans, plerumque submersa, membranacea, nervis pluribus longi- 

 tudinalibus distinetis et venis multis transversis, diaehymate inter venas interdum pertuso. 

 Pedunculus longus, plerumque crassiusculus, saepe dimidio superiore paullum inflatus. 

 Inflorescentia spicata, monostaehya vel distaehya, rarius in spicas 3 — 4 partita, 

 densiflora vel laxiflora, aut ubique florifera aut dorsiventralis, juvencula spatha conica, 

 deinde caduca inclusa. 



A. Engler, Das Pflanzenreich. IV. 13. 4 



