TETRADYN. SILIft. 199 



leaflets laticeolate somewhat cut or entire, stipules ciliated, 



petals linear or none. Br. Ligklf. p. 349, E. B. t. SO. 

 Hab. Foot of mountains and in shady places, but nire. Light/. Rocks 



on the banks of the river above the falls of the Clyde, Hopk. Fl. May, 



June. . 

 One or one foot and a half high ; v/ell distinguished by the stipules at 



the base of each leaf. Flowers minute, white. It owes its speciric 



name to the elastic force of the valves of the numerous pods j whicli 



thus burst and discharge the seeds. 



5. C. hirsuta {hairy Lady's Smock), leaves all pinnated and with- 

 out stipules, leaflets petiolate radical ones roundish, stain. 

 (4 — 6) equal in length to the petals, stigma nearly sessile. Br. 

 Ligluf. p. 34S, and p. 1 104 (C. parviflora). E. B. i. 492. 



Hab. M'Hst shady places, and among rocks and by the sides of rivu- 

 lets, plentiful. Fl. May, June. O • 



X'arying much in luxuriance according to soil and situation. From 4 

 inches to 1 foot or more high, more or less branched and straight ; 

 sometimes zigzag (the C.jiexuosa of With, and Hopk.) . Leaflets more 

 or less angled or toothed, upper ones ovate : varying also exiremely 

 in the degree of hairiness, sometimes being quite smooth. FLowen 

 small, white. 



** Leaves undivided. 



6. C. lelUdifoUa {Daisy -leaved Lady's Smock), leaves simple 

 ovate entire upon rather long footstalks. E, B. t. 235.5. 



Hab. Gathered in Scotland bv Mr. Milne, formerly curator of tlie Ox- 

 ford Bot. Garden, E. Bot. ' Fl. Aug. If. . 



One inch to 3 inches high. Leaves, even the cauline ones, on rather 

 long footstalks. Flowers few, small, white. \\'ry near C. aljiina. 



12. ARABIS. 



1. A. hispida (short-podded Rock- Cress), rafWcal leaves smus.to- 

 lyrate lengthened below into footstalks, cauline ones mostly 

 undivided glabrous, fruit-bearing peduncles spreading half as 

 long as the pods. Br. Light/, p. 317 - i- 15 (Cardamine 

 petrcea). E. B. t. 409 {Cardamine hastulala). 



Hab. Moist rocks by the sides of rivulets, near the summits of trie 

 Highland mountains, as on Craig- Chailleach, in Breadalbane, 

 Baike-val, in the Isle of Rum, abundantly, and Ben-na-Cailleacii, 

 in Strath in the Isle of Skye. Banks of the Dee, Aberdeenshire, 

 Anderson and Lightf. Ben More, in Mull, Mangh. ■ Fl. July. 1/ . 



Three to six inches high, slender, glabrous. Radical leaves numerous : 

 cauhne ones few, toothed or entire. Hojt-ers small, whitish, orv/lth 

 a purplish tinge, 



2. A. thaliaiia {common Wall-Cress), leaves subdentate pilose, 

 radical ones subpetiolate oblong, stam. as long as the petals, 

 stem branched, poda "ascending. Lightf. p. 358. E. B. 

 t. 901, 



Hab. Walls, dry banks, and gravelly soilsj, common. H.Apr, May. 0« 



