Order 126. Alismacea. 367 



linear, spathulate obtuse, scape shorter than the petioles ; 

 flowers white in 3's, sepals linear oblong, petals much larger, 

 achenes roundish. 



Mai wan taluka, Stocks and Ddlzell (D. and #.). 



To the same tribe as these two belongs Sagittaria Sagittifolia, " the 

 common arrow-head " of English brooks and rivers, a handsome plant 

 with white 3-petalled flowers. H. has it as growing in tanks 

 throughout the plains of India, and it is otherwise a widely spread 

 plant ; but it is not in the Bombay books. 



3. BUTOMOPSIS. 



Note. This genus has by other writers been put in a separate 

 order, Butomaceae, of which Sutomus umbellatus, the flowering rush, 

 is one of the handsomest of English aquatic plants. It is found also 

 in the Punjaub and Cashmere. 



* B. lanceolata. Leaves radical, long-petioled, lanceolate, 

 scape as long as the leaves, 6 to 1 2-flowered ; flowers in umbels 

 erect, petals white. 



Chickli in the Surat district (D. and #.), but H. has it as through- 

 out the plains of India and the tropics of the Old World. 



ORDER 127. NAIAD ACE-ffi. 



Aquatic or marsh herbs, with inconspicuous, usually green 

 flowers, perianth various, stamens hypogynous, ovary of one to 

 four carpels, fruit dry. 



A small order of temperate and tropical lands, in no way remarkable. 

 All here given are submerged plants. 



1. APONOGETON. Scape long, bearing one or two spikes of 

 bisexual flowers; perianth of one to three white segments, 

 fruit of 3 or more follicles. 



2. POTAMOGETON. Flowers in a spike, the scape rising from 

 a membranous spathe, perianth of 4 green segments, anthers 4, 



essile on the sepals. 



3. NAIAS. Flowers minute, male flowers with perianth of 

 an outer and inner tube, stamen one adnate to the inner ; 

 female flowers without perianth. 



1. APONOGETON. 

 * A. monostachyon. Leaves radical, long-petioled, linear 



