10 MONANDRIA— DIGYNIA. Callitriche. 



spreading, with acute stigmas. Seeds 4, naked, roundish, 

 compressed, with a dilated margin. 

 Inundated or floating herbs. Leaves opposite, simple, en- 

 tire. Fl. minute, axillary, white, often separated. 



1 . C. verna. Vernal Water-starwort. 



Leaves triple-ribbed; the uppermost crowded, obovate. 



Margin of the seeds obtuse. 

 C. verna. Linn. Sp. PL 6. Willd. v. 1. 28. Wahlenh. Lapp. 2. 



Fl. Dan. t. 129. Tozzetti Ohs. 7. t. A.f. 18—22. 

 C. aquatica. Huds. 439. Fl. Br. 8. Engl. Bot. v.W. t. 722. 



Hook. Lond. t. 127. Scot. 259. 

 Stellaria. Raii Syn. 289. Dill. Giss. app. 119. t. 6. 

 S. n. 553. Hall. Hist. v. 1. 238. 

 S. aquatica. Lob. Ic. v. 1. 792./. 



Alsine aquis innatans, foliis longiusculis. Bauh. Hist. v. 3. 777. 2./. 

 Water Star-wort, Pet. H. Br. t. 6.f. 3. 

 /3. C. aquatica (3. Fl. Br. 9. Huds. 439. 

 Callitriche Plinii. Column. Ecphr. v. \. 315. t. 316. . 



Stellaria minor et repens. Raii Syn. 289. 

 S. n. 554. Hall. Hist. v. 1. 238. 



In ditches^ ponds, and slow streams, every where. 



Annual. April, May. 



Root of very long slender fibres. Stem thread-shaped, branched, 

 leafy. Lower leaves distant, spatulate, or lanceolate ; upper- 

 most stalked, crowded into a starry form, floating on the surface, 

 elliptical or obovate, with 3 ribs, channelled beneath, and united 

 above the base. Fl. axillary, solitary, sessile, usually separated; 

 one barren ; the other in the bosom of the opposite leaf fertile 3 

 in other parts of the stem 2 barren or 2 fertile ones are neigh- 

 bours. Yellow anthers conspicuous above the floating leaves. 

 Fruit of 4 little, flat, thin, vertical, almost orbicular seeds. Dr. 

 Targioni Tozzetti has always found the stam. and pist. in sepa- 

 rate ^0M;er5. 



2. C. autumnalis. Autumnal Water-starwort. 

 Leaves linear, abrupt, single-ribbed, uniform. Margin of 



the seeds membranous. 

 C. autumnalis. Linn. Sp. PL 6. Willd. v. I. 29. Wahlenh. Lapp. 2. 

 C. aquatica y. Fl. Br. 9. EngL Bot. r. 1 1. 722. Huds. 440. 

 C. foliis oppositis oblongis, fructibus quadrifariam dehiscentibus. 



GmeL Sib. v. 3. 13. t. \.f.2. 

 Stellaria aquatica, foliis longis tenuissimis. Raii Syn. 290. 

 S. n. 555. HaU. HisL v. 1. 238. 

 Lenticula palustris angustifolia, folio in apice dissecto. Loes. Pruss. 



140.^.38. 



