470 The Cryptogamous Plants of Dr. Roxburgh. 



2. S. cucullata. R. Wall. Cat. 13, No. 399. 



Ramous. Floating. Leaves opposite, subsessile, cowl- 

 shaped, erect with an opening on the inside. 

 Beng. Indurni-pana. 



3. S. imbricata. JR.* 



Floating, ramous, winding. Leaves sessile, alternate, bi- 

 farious, imbricated, trapeziform, fleshy. Capsules covered by 

 imbricated scales, between the roots, on the under-side of 

 the plant. 



All three are found floating on lakes, or pools of sweet 

 water, throughout Bengal, during the rainy season. 



4. ISOETES. 



Anthers of the male flower within the base of the inner 

 leaves. Capsules of the female flower 1 or ^-celled, within 

 the base of the exterior leaves. 



1. /. capsularis. R. Icon. Roxb. 14, t. 81. 

 Capsules peduncled, I-celled. Leaves linear, flat. 



This plant grows ir^ deep standing sweet water, with 

 Valisneria spiralis, &c. 



Stoles creeping, jointed, tufts of filiform roots descend 

 from each joint, and from 4 to 12 leaves ascend ; they are 

 like those of Valisneria spiralis, very delicate, 2-3 feet 

 long, a quarter of an inch broad, and slightly serrated 

 near the apex. From the alae of the leaves arise several 

 diaphanous, cordate capsules standing on short peduncles ; 

 they consist of 1-cell, formed of two valves, opening from 

 the apex, the seeds are numerous connected to a conical re- 

 ceptaculum in the centre. 



I have not seen the male flowers. 



2. /. coromandeliana. Linn. Suppl. 447. Icon. Roxb. 

 14, t. 82. 



Capsules sessile within the enlarged base of the leaves, 

 1 -celled. Leaves filiform, erect, semi-columnar. 



* Azolla?— W. G. 



