144 DEC AND. FENTAGYN. 



Wark, by Kelso, abundant, Light/. Guillon LinLs, Mr. Arnott. 

 Near Forfar, D. Don. Fl. June. TJ. - 



Stems branched and decumbent at the base, only a span high, slender. 

 Flowers large, pure white, 2 or 3, on terminal stalks. Caps, scarcely 

 danger than the cal. 



0. C. altoinum (hairy alpine duckweed], subglabrous or clothed 

 with long white soft silky hairs, leaves elliptical ovate, flowers 

 13, capsule oblong curved. Light/, p. 242. /. 9 (C. lati/o- 

 Hum), a good fig. E. B. t. 472. 



HAB. Highland mountains, not rare, Ben Lomond, Ben Lawers, 



Ben Nevis, &c. Fl. July. 7/ . 

 Much branched below and creeping, then erect, 3 5 inches high. 



Mowers large, handsome, white. Petals bifid at the point. 



7. C. lutifoiwm (pubescent alpine duckweed), clothed with 

 short rigid yellowish pubescence,, leaves elliptical ovate, flowers 

 12, "capsule ovate" (Sm.). E. B. .473. 



HAB. Highland mountains, I suspect, rare. I have gathered it on Ben 

 Nevis. Ben Lawers, Maugh. Ben Lomond, Mr. Murray. E. side 

 of Ben Voirlich, Mr. Arnott. Fl. July. 3/ . 



Generally smaller than the last, and probably often confounded with 

 it. The chief distinction is in the caps. There is also, as Sir James 

 Smith observes, a considerable difference in the clothing of the stem 

 and leaves, which in my specimens of latif. I find to be always yel- 

 lowish. Lowermost leaves frequently glabrous. Flowers large, as 

 in the last. 



8. C, aquaticum (IVater Chickweed), upper leaves cordato- 

 ovate sessile, flowers solitary, fruit pendulous. Liqktf. p. 242. 

 E. B. /.538. 



HAB. Sides of rivers and ditches, occasionally. Fl. July. }/ . 



Stem 1 2 feet long, branched and straggling. Leaves large, lower 

 ones on footstalks, with short scattered hairs on the edges and mar- 

 gins, whilst those of Stellaria Nemorum (to which this is so closely 

 allied), besides having 5 styles, is only ciliated on the margin,, and 

 appears on the surface, when seen under the microscope, very mi- 

 nutely dotted with raised points. Stems viscid upwards. The caps. 

 opens" with 5 teeth or valves. In this respect, too, agreeing best with 

 Stellaria, where, indeed, Persoon has placed it. 



21. SPERGULA. 



1. S. arvensis (Corn Spnrrey\ leaves vvhorled with minute mem- 

 branaceous stipules at the base, stalk of the fruit refiexed, 

 seeds more or less margined. Light/, p. 243. E. B. t< 1535, 

 and t. 1536 (S.pentandra). 



HAB. Corn-fields, frequent. Fl. Aug. O . 



Stems 6 12 inches high, swelling at the joints. Leaves narrow, li- 

 near, rounded, glabrous or a little pubescent, of 2 bundles from ech 

 ioint, spreading in a whorled manner. Panicle of maiiy flowers. 

 Pet. ovate, white, rather longer than the cal. Stam. often 5. Seeds 



