21 



Ech. muricatus Griseb. 6 ) 



A. Grisebach Novitiae florae panamensis in Bonplandia 

 1858, VI, p. 11. 

 Ech. natans Engelm. 



Engelmann in Ascherson, Flora d. Prov. Brandenburg 

 1864, I, p. 651. 



P= Elisma natans Buchen. 

 Ech. natans c. repens Echb. 



Ascherson, Flora d. Mark Brandenburg 1864, I, p. 652. 



== Elisma natans Buchen. 

 Ech. natans b. zosterifolius Fr. 



Ascherson, ibid. 



= Elisma natans Buchen. 

 Ech. parnassifolius (L.) Engelm. 



Ascherson, ibid. p. 651. 



(Caldesia parnassifolia Parlat.) 



Ech. tenellus Buchen. 15 ) 



v. Alisma tenellum Mart. et Echinodorus parvulus Eng.) 

 Ech. parvulus Eng. 15 ) 



G. Engelmann in Asa Gray, Manual of Botany ed. II, 

 1856, p. 438. 

 Ech. radicans Eng. 



G. Engelmann ibid. 

 Ech. ranunculoides Engelm. 



G. Engelmann in Ascherson, Flora d. Prov. Brandenburg 

 1864, I, p. 651. 

 Ech. rostratus Eng. 6 ) 



G. Engelmann in Asa Gray, Manual of Botany ed. II, 

 1856, p. 438. 

 Ech. subalatus Gris. 



Grisebach, Catalogus plant. Cubensium, 1866, p. 218.' 

 Ech. subulatus Gray (non Engelm.!) 26 ) 



Asa Gray, manual of botany ed. I, 1848, p. 460. 



= Ech. parvulus Engelmann. 



Elisma Buchen. 



Fr. Buchenau, über die Richtung der Samenknospe bei 

 den Alismaceen, in Pringsheim, Jahrbücher für wissen- 

 schaftliche Botanik, 1868, VII, p. 25. 

 E. natans Buchen. 



ibid. 



Limnophyton Miq u ) 



Miquel, Flora van nederlandsch Indie, 1855, III, p. 242. 

 L. obtusifolium Miq. 



ibid. 

 Ottelia Pers. est genus Hydrocharitacearum. 17 ) 



Ottelia alismoides Pers. (Damasonium indicum Willd). 

 Sagittaria L. 



Linne, systema naturae ed. I, 1735, p. . . ., genera plan- 

 taren, ed. I, 1737, n. 723, p 



