378 MONOCOTYLEDONOUS PLANTS. 



few ; fertile one solitary, deflexed ; stamen* mostly 7. Alisma 

 lata Pursh. 



HAB. Muddy banks. Penn. to Geor. Aug. If. Scape 24 

 inches high. Leaves rarely ever subulate, scarcely a line wide r 



and obtuse. Sterile Flowers 3 6. Fertile 1, recurved. 







8. 8. natans Mich. : leaves floating, elliptic-lanceolate, o"btuse, 3- 

 nerved, attenuated at base ; lower ones subcordate ; scape simple, 

 few-flowered ; lower peduncles elongated. 



HAB. In water. Mukl. S. to Car. July, Aug. 2J.. Scape 

 mostly erect, 36 inches long. Leaves generally floating, 1 2 

 inches long. Flowers few, small, the upper sterile. EU. 



2. ALISMA. Linn. 



Perianth 6-partcd ; 3 outer segments persistent, calycine ; 

 3 inner coloured, petaloid. Stamens 6. Ovaries and styles 

 numerous. Capsules numerous, distinct, 1-seeded, not open- 

 ing. Hexandria. Polygynia. 



A, plantago Linn. : leaves ovate^cordate, acute or obtuse, 9-nerved :- 

 flowers in a compound verticilate panicle ; fruit obtusely triangular. 



l>. parviflora Torr. : leaves oval, 5 7-nerved, acuminate ; flowers 

 very small. A. parciflora Pvrsh. 



HAB. In water. Can. to Flor. July, Aug. If.. Scape 12 

 feet high, triangular. Leaves all radical, on long petioles. Pani- 

 cle much decompounded in a yerticillate manner. Flowers white, 

 tinged with purple Var. b. has the flowers smaller and the 

 leaves not more than 7-nerved. It generally grows near salt 

 water. Water Plantain, 



ORDER CXXXIII. JUNCAGINEjE. Rich. Lind. 



Perianth herbaceous, rarely wanting. . Stamens 6, hypo- 

 gynous. Ovary of 3 or 6 carpels, cohering firmly together ; 

 ovules 1 or 2 in each carpel, erect, approximated at the base. 

 Fruit dry. Seeds 1 2, erect; -albumen none; embryo 

 straight; radicle at the opposite extremity from the hilum ; 

 plumule emitted through a lateral cleft in the embryo. 



Herfis growing in bogs. Leaves ensiform, with parallel 

 veins. 



I. TRICHLOCHIN. Lam. 



Perianth 6-leaved, deciduous ; the leafets concave, 3 in- 

 ner ones inserted higher up. Stamens 6, very short. An- 

 thers with their anterior side turned outward, subsessile. Ova- 

 ries 3 6, 1-seeded. Styles short. Stigmas adnate. Cap- 

 sules 3 6, valveless, Seeds erect. Hexandria. Trigynia. 



