32 
CALYCIFLOR;* 
Oldenlandia aquation, foliis cbovatis oppositis, fioribus 
singularibus ad alas, Browne, Join. 146. — O. uniflora, 
Willd.'Sp. I. 675. — Ludwigia repens, Swartz, FL Ind. 
Occ. I. 273. — Isnardia repens, VC. Prod. III. 60. 
II 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 fibrillae at the joints, glabrous, 
coloured. Leaves shortly petiolate, subacute at the apex, 
acuminate at the base, 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, g Stamens 12 to 20. 9 
Ovary superior, 1-celled } style pervious : stigma 
oblique. Nut I -seeded, indehiscent, terminated 
by the hardened stigma: seed solitary 5 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 urticejE. As I have commenced, however, with 
the arrangement of DeCandolle, 1 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. 
