]l5Q MONADELPHIA OCTANDRIA. DECANDRIA, 
OCTANDRIA. 
PISTIA. Gen Pl. 1112. 
Calyx spatha tubu 
losa,cucullata, li ngula- 
ta. Corolla 0. Fi- 
lamenta lateralia, 3 — 
8. Capsula 1 locula- 
ris, polysperma. 
Calyx a tubular cu- 
culate spathe, strap 
shaped. Corolla 0. 
Filaments lateral, 3 — 
8. Capsule 1 celled, 
many seeded. 
1. S 
PATHULATA. 
Mich. 
P. foliis in petiolum 
abrupte angustatis, 
superne dilatatis, ro- 
tundato obtusis. 
Leaves abruptly 
narrowed into a peti- 
ole, dilated, round and 
obtuse towards the 
summit. 
Mich. 2. p. 162. Pursh 1. p. 268. Nutt. 2. p. 80. 
A floating aquatic. Leaves all radical, expanded in a circle. Flowers 
axillary, subsessile, solitary, white. Nuttall. 
This plant, which is said to grow in the stagnant waters and streams of 
Florida and the southern parts of Georgia, I have not seen. 
Flowers through the whole summer. 
DECANDRIA. 
GERANIUM. Gen. Pl 1118. 
Calyx 5 phyllus. | Calyx 5 leaved. 
Petala 5 regularia. | Petalr 5 regular. Eta- 
Stamina 10. jS 'tig- j mens 10. Stigmas 5. 
