SPECIES AND VARIETIES. 49 



(24) Holosteum. 



H. umbellatum : annual ; leaves ovate, acute ; flowers white, 

 umbellate. Walls and roofs. Fl. April. 



(25) Cerastium. MOUSE-EAR CHICKWEED. 



C. vulgatum: annual, branched, usually viscid; leaves 

 roundish-ovate, stalked; flowers minute, in dichotomous pa- 

 nicles. A very variable plant. Waste places, very common. 

 FL April to September. 



C. arvense : leaves crowded below, lanceolate-linear ; flowers 

 large, white, in loose cymes. Dry sandy fields. Fl. May to 

 August. 



(26) Stellaria. STARWORT. 



S. nemorum : lower leaves heart-shaped, upper ovate sessile ; 

 flowers large, white, in elegant spreading cymes, the petals 

 narrow and deeply cleft. Moist woods. Fl. May, June. 



S. media : annual, smooth ; stems weak, branched ; leaves 

 small, ovate; flowers small, white. Chickweed. Cultivated 

 and waste ground. Fl. all the year. 



S. Holostea : leaves lanceolate, finely saw-toothed ; flowers 

 large, white, with inversely heart-shaped petals. Stitchwort. 

 Groves, thickets, and hedge-sides. Fl. May. 



(27) Geranium. CRANE'S-BILL. 



G. molle : annual ; leaves orbicular, cut into 7-1 1 wedge- 

 shaped lobes; peduncles 2-flowered; flowers small, purple, 

 with deeply notched petals. Waste places. Fl. April to 

 August. 



(28) Oxalis. WOOD-SORREL. 



O. Acetosella : peduncles radical, 1 -flowered; flowers white. 

 Groves and shady places. Fl. April, May. 



