32 CALYCIFLOR*! 



Oldenlandia aquatica, foliis obovatis oppositis, floribus 

 sinsfularibus ad alas, Browne, Jam. 146. — O. uniflora, 

 Willd. Sp. I. 675. — Ludwigia repens, Swartz, FL Ind. 

 Occ. I. 273. — Isnardia repens, DC. Prod. III. 60. 



H A B The banks of still flowing streams. Very- 

 common in the Ferry River. 



F L. Throughout the year. 



Stem creeping, sparingly branched, 1-2 feet in length, 

 tetragonal, sending out fibrillse at the joints, glabrous, 

 coloured. Leaves shortly petiolate, subacute at the apex, 

 acuminate at the b;ise, very glabrous, erubescent. Pedi- 

 cels solitary, shorter than the petioles, 1-flowered. Flow- 

 ers small. A pair of lanceolate bracteoles at the base of 

 the ovary. Calycine lobes 4, acute. Petals 4, much 

 smaller than the segments of the calyx, ovate, clawed. 

 Capsule oblong, tetragonal : seeds many. 



ORDER LXXIII CERATOPHYLLEiE. 



Flowers monoecious. Calyx inferior, 10-12- 

 partite. Petals none. ^ Stamens 12 to 20. 9 

 Ovary superior, l-celled \ style pervious : stigma 

 oblique. Nut I -seeded, indehiscent, terminated 

 by the hardened stigma: seed solitary; albu- 

 men Oj embryo dicotyledonous ; plumule many 

 leaved 5 radicle inferior. 



The ovary being superior, it is evident that this Order 

 is misplaced. It has been made by Dr. Lindley to fol- 

 low the urt:ce.£:. As I have commenced, however, with 

 the arrangement of DeCandolle, I will not depart from 

 it on the present occasion. 



This order comprises only one Genus ; and, that but 

 few species. The plants have been found in ditches and 

 in slow flowing streams, growing under water, in almost 

 every part of the world. Leaves whorled and finely 

 dissected. 



