SPECIES AND VARIETIES. 45 



(9) Barbarea. Winter-cress. 



B. vulgaris : stem erect ; lower leaves lyrate, with a broad 

 rounded terminal lobe; flowers, small, yellow, racemed. — 

 Belleisle Cress or Yellow Rocket. — Waste places. Fl. May to 

 July. 



(10) Arabis. Rock-cress. 



A. Thaliana : annual ; stem slender, erect ; lower leaves 

 stalked, oblong, with a few coarse teeth, upper few, small, ses- 

 sile; flowers small, white. — Thale-cress. — Banks and waste 

 places. Fl. April. 



A. Turrita : biennial ; stem stifl*, erect ; lower leaves stalked, 

 upper sessile, stem-clasping, oblong-lanceolate, slightly toothed; 

 flower small, whitish. — Tower-cress. — Walls, rare. Fl. May. 



(11) Cardamine. Bitter- cress. 



C. amara : stems weak, ascending ; leaves pinnate with 5-7 

 large ovate or orbicular segments, the upper ones angular 

 toothed ; flowers largish, white, in few-flowered racemes. — 

 Sides of streams and watercourses. Fl. April, May. 



C. pratensis : stems stiff', erect ; leaves pinnate the seg- 

 ments of the lower roundish, those of the upper ones narrow 

 and entire ; flowers largish, pale pink or blush -coloured. 

 — Ladies'-smock or Cuckoo-flower. — Moist meadows. Fl. 

 April, May. 



C. hirsuta : stems ascending or erect, more or less hairy ; 

 leaves pinnate, with small roundish-oblong angularly toothed 

 segments; flowers small, white. — Moist shady places. FL 

 March to June. 



(12) Alliaria. Garlic Mustard. 



A. ofiacinalis : annual or biennial ; stem erect ; lower leaves 



