SPECIES AND VARIETIES. 



49 



(24) Holosteum. 

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

 umbellate. — Walls and roofs. El. 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. moUe : 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. 



