ALISifA. SAGITTARIA. 413 



Suborder I. Alismoidece. 



1. ALIS'MA Linn. Water-Plantain. 



1. A.Plantd(/o (L.) ; fl. -stalk panicled with whorled compound 

 branches, carp, ranged in a circle compressed blunt obovate, style 

 beloiv the top of inner edye of carp., 1. cordate-ovate or lanceolate. 

 12.12.837. JR. vii.t. 57. L. all radical, on long stalks. Sub- 

 mersed 1. linear. FJ. -stalks 23 ft, high. Fl. pale rose-colour. 

 Sep. ovate-oblong, styles twice as long as ovary. /3. A. lanceo- 

 lata (With.) ; 1. lanceolate narrowed below, Sy. E. B. 1438. 

 Sep. ovate, styles equalling the ovary. Perhaps distinct. By 

 water. P. VII. VIII. E. S. L 



2. A. rammculoldes (L.) ; fl. -stalks umbellate, carp, angular 

 acute forming a globose squamose head, style terminal, 1. linear- 

 lancolate acute. E. E. 326. R. vii. t. 55. L. all radical, on 

 long stalks. Fl. -stalks from 3 to 24 in. long, ending in 1 or 2 

 umbellate whorls of simple peduncles. Fl. pale purple. /3. A. 

 repens (Dav.) ; stoloriiferous, producing 1. roots and fl. at the 

 nodes, fl. larger. E. E. 8. 2722. Turfy bogs. /3. By lakes in 

 Whales and Ireland. P. VI. VII. E. S. I. 



3. A. ndtans (L.) ; st. floating and rooting leafy, peduncles 

 simplei'rom the joinings of the stem, ca?y>.striate beaked, floating 

 1. stalked oblong blunt, radical leafless petioles broadly subu- 

 late. E. B. 776. It. vii. t. 54. Elisma Buchan. St. slender, 

 often very long. Root-petioles in small tufts. Fl/ rather 

 large, white with a yellow spot. Lakes, rare. P. VIII. E. 



2. DAMASO'NIUM Hill. (Actinocarpus R. Er. cd. viii.) 



1. D. Alis' ma (Mill.); stalks with 13 whorls of fl., carp, 

 subulate compressed opening longitudinally, 1. cordate-oblong. 

 E. B. 1615. Alisma L. L. all radical, floating, on long 

 stalks, 5-veined. Pet. white. Carp, large ; with 2 stalked 

 seeds, one from the lower angle erect, one from the upper hori- 

 zontal. Pond and ditches, rare. P. VI. VII. E. 



3. SAGITTA'RIA Linn. Arrowhead. 



1. & sagittifolia (L.) ; aerial 1. arrowshaped with lanceolate 

 straight lobes, fl.-stalk simple, fl. whorled. E. B. 84. R. vii. 

 t. 53. Stoloniferous ; each runner ending in a tuber. The 1. 

 that rise above the water are remarkably arrowshaped, with the 

 3 parts nearly equal. The submersed leafless petioles are linear. 

 Fl. white. Ditches and rivers. P. VIII. E. I. 



