284 



THE FLORA. 



COHOET VI. 



FLORIDBiE, OR THE FLOWERING ENDOGENS. 



Order CXXXY. ALISMACEvE. AUsmads. 



Herljs growing in water, with the leaves parallel-veined, and with the 

 flowers regular and not on a spadix ; the perianth consisting of 

 sepals and petals^ 3 of each, the former always green ; 

 ovaries free, 3 or more, separating into as many 1-seeded achenia. 



Lvs. 



Analysis of the Genera. 



§ Both the calyx and corolla greenish 



rush-like {Arrow-grasses) b 



§ Corolla colored, white. Leaves mostly 



with a lamina a 



a ris. y$ . Sta. 6. Carpels whorled. 



Water Plantain. Alisma. 1 

 a ris. § . Stamens 0-24. Carpels in a 



head. Echinodore. Echinodokus. 

 a FIs. S . Sta. many. Carpels in a 

 head, Arroio-Tiead. Saoittaria. 2 

 b Lvs. radical. Anthers ovate. Carpels 



1-seeded. Triglock. TRiQLocHm. 



b Leaves cauline. Anthers linear. Car- 

 pels 1-2-seeded. Scheuchzeria. 



1. ALISMA. Water Plantain. 



Flowers perfect. Stamens 6. Ova- 

 ries and styles numerous, collected into 

 a whorl, becoming in fruit many dis- 

 tinct, flattened achenia. — if Stemless 

 herbs, the leaves all radical. Flowers 

 in a panicle. 



A. planta'go. A common, smooth, handsome 

 inhabitant of ponds and ditches. Leaves 

 oval or ovate, abruptly acuminate, 7-9- 



Fig. 643. Sagittaria sagiltifolia (com- 

 mon form), leaf and flowers. 4. One 

 of the pistils enlarged. 5. The pistil of 

 Alisma cut open, showing the seed and 

 curved embryo. 



