48 MONANDRIA DIGYNIA. Qc L. I. 



flowers throughout the summer : grows immersed in ditches, pools, 

 and still rivers : frequent. Eng. Bot. vol. xv. pi. 1070. Eng. Ft. 

 vol. i. p. 7. 10. 



7. C. nidifica. Proliferous Water Horse-tail. Stems simple, below ; 

 whorled branches simple, elongated, those bearing flowers axillar, very 



numerous, compound, crowded ; bracteas distinct, unequal. Annual : 



flowers from August to October : grows in saltwater ditches : very rare. 

 Shoreham, Sussex ; Clay, Norfolk. Loch Neagh, Ireland. Eng. Bot. 

 vol. xxiv. pi. 1703. Eng. Fl. vol. i. p. 8. 11. 



8. C. grdcilis. Slender Water Horse-tail. Stems transparent, smooth ; 

 whorled branches acute, repeatedly forked, and as well as the compound 



axillar one, often bearing flowers ; bracteas wanting. A small, delicate, 



pale-coloured, glossy plant. Annual : flowers in August and September : 

 grows in still water : rare. Fish-ponds in Jersey ; Sussex ; North Wales. 

 Eng. Bot. vol. xxx. pi. 2140. Eng. Fl. vol. i. p. 9. 12. 



DIGYNIA. 



5. CALLI'TRICHE. STAR-WORT. 



Calyx none. Petals two, curved inwards, opposite, equal. 

 Filament slender, elongated. Anther two-lobed. Germen su- 

 perior, four-lobed. Styles two, hair-like. Stigmas acute. Seeds 

 four, oblong. Name from kallos, beautiful, and t/irix, hair. 5. 



1. C. vrna. Vernal Water Star-wort. Fruit-bearing peduncles 

 very short, with two bracteas at their base ; fruit regularly tetragonal, 



each portion bluntly keeled at the back. Stems feeble, numerous, 



branched, leafy ; leaves varying from linear to oval, the upper three- 

 nerved, and crowded. Annual : flowers in April and May : grows by 

 the edges of pools, ditches, and brooks : common. Eng. Bat. vol. xi. pi. 

 722. Eng. Fl. vol. i. p. 10. 13. 



2. C. pedunculdta. Pedunculated Water Star-wort. Fruit-bearing 

 peduncles elongated, without bracteas at the base ; fruit regularly 



tetragonal, each portion bluntly keeled at the back. Leaves all linear. 



Annual : flowers in June : grows in a ditch at Amberley, Sussex. Eng. 

 Bot. Suppl. pi. 2606. Brit. Ft. 4th ed. p. 329. 14. 



3. C. autumndlis. Autumnal Water Star-wort. Fruit-bearing pe- 

 duncles very short, without bracteas; fruit irregularly tetragonal, each 



portion broadly and acutely winged at the back. Leaves all linear, 



fruit larger than in the other species, its dorsal wing very broad. An- 

 nual : flowers from July to October : grows in the Loch of Cluny, in 

 Scotland ; in the outlet of Llyn Maclog, Anglesea ; and near London. 

 Loch Neagh, Ireland. Eng. Bot. vol. xi. pi. 722, small figure. Brit. 

 Fl. 4th ed. p. 329. 15. 



