272 TETRADYNAMIA 8ILIQUOSA. [CL. XV. 



watery places : common. Eng. Bot. vol. xi. pi. 776. Eng . Fl. vol. iii. 



p. 189. 960. 



4. C. amdra. Bitter Cardamine. Leaves pinnate, without stipules ; 



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. A'RABIS. 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 ; anthers 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.Tha'duna. Common Wall-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 Hock-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, corymbose, 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. petrte'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, ascending : 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. ciliiit/i. fringed Rock-crexs. 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. Biennial : flowers in July: 

 found at Rinville, Cunnemara, and on rocks in Glen Esk. Eng. Bot. pi. 

 1746. Eng. Fl. vol. iii. p. 212. 966. 



6. A. Turritn. Tower-cress. Leaves toothed, embracing the stem ; 

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



