272 TETRAD YNAMIA SILIQTJOSA. [CL. XV. 



grows in most meadows and watery places : common. Eng. Bot. 

 vol. xi. pi. 776. Eng. Fl. vol. iii. p. 189. 960. 



4. C. amdra. 'Bitter Cardamine. Leaves pinnate, without sti- 

 pules : leaflets of the lower more roundish, of the rest angular or 



toothed ; stem creeping at the base. Stems from one to two feet 



high : flowers large, white. Perennial : flowers in April and May : 

 grows in wet meadows : frequent. Eng. Bot. vol. xi. pi. 776. Eng. 

 FL vol. iii. p. 189. 961. 



16. AHABIS. WALL-CRESS. 



Calyx of four oblong, converging, erect, deciduous leaves, 

 two opposite ones somewhat larger, and protuberant at the base. 

 Petals oblong, undivided, spreading, tapering into broadish 

 claws, hardly so long as the calyx. Filaments thread-shaped, 

 erect, generally with four glands at their base externally ; an- 

 thers heart-shaped. Germen linear. Style very short ; stigma 

 obtuse. Pod linear, compressed ; its valves nearly flat, ribbed 

 or veined, slightly undulated by the seeds ; partition linear, 

 membranous. Seeds in one row, oval or round, compressed. 

 So named because originally an Arabian genus. 329. 



1 . A. Thalidna. Common Watt-cress. Leaves hairy, toothed ; 



root-leaves stalked, oblong, the rest sessile. About a foot high, 



branched : flowers small, white, corymbose. Annual : flowers in 

 April : grows on walls, and in dry sandy ground : common. Eng. 

 Bot. vol. xiii. pi. 901. Eng. Fl. vol. iii. p. 209. 962. 



2. A.stricta. Bristol Rock-cress. Leaves toothed, obtuse, bristly; 



those of the root somewhat lyrate ; stem hairy ; calyx smooth. 



Stem from three to six feet high, round, leafy : flowers few, corym- 

 bose, erect, cream-coloured. Perennial : flowers in May : grows in 

 rocky places, about Bristol : rare. Eng. Bot. vol.ix. pi. 614. Eng. 

 Fl. vol. iii. p. 210. 963. 



3. A.petrce'a. Alpine Rock-cress. Root-leaves lyrate, smooth or 

 with scattered hairs ; stem-leaves lance- shaped, entire, scattered ; 

 petals spreading. Stem from three to ten inches high, ascend- 

 ing : root-leaves in tufts : flowers small, white. Perennial : flowers 

 in July : grows in the fissures of rocks on high mountains in Wales 

 and Scotland : frequent. Eng. Bot. vol. vii. pi. 409. A. hispida. 

 Eng. Fl. vol. iii. p. 211. 964. 



4. A. hirsuta. Hairy Wall-cress. Leaves all bristly, toothed, 



those of the stem embracing ; pods erect. Stems about a foot 



high, erect, stiff, leafy, covered with spreading hairs : flowers small, 

 white. Perennial : flowers in May : grows on dry rocks, gravelly 

 banks, and walls : frequent. Eng. Bot. vol. ix. pi. 587. Eng. Fl 

 vol. iii. p. 213. 965. 



5. A. cilidta. Fringed Rock-cress. Leaves somewhat toothed, 

 oval, hairless, fringed, those from the root nearly sessile, obtuse, 

 those of the stem half-embracing ; stem unbranched ; pods nearly 

 erect. From three to six inches high, with white flowers. Bi- 

 ennial : flowers in July : found at Kinville, Cunnemara, and on rocks 

 in Glen Esk. Eng. Bot. pi. 1746. Eng. Fl. vol. iii. p. 212. 966. 



6. A. Turrlta. Tower-cress. Leaves toothed, embracing .the 

 stem ; pods linear, flat, recurved in one direction ; bracteas leafy. 



