TETRADYN. SILIGl. 199 



leaflets lanceolate somewhat cut or entire, stipules ciliated, 

 petals linear or none. Br. Lightf. p. 349. E. B. t. 80. 



HAB. Foot of mountains and in shady places, but r-uv, Lighff. Rocks 

 on the banks of the river above the tails of the Clyde, Hop/c. Fl. May, 

 June. O- 



One or one foot and a half high ; well distinguished by the stipules at 

 the base of each leaf. Flowers minute, white, it owes its specific 

 name to the elastic force of the valves of the numerous pods ; which 

 thus burst and discharge the seeds. 



-5. C, hirsula (hairy Lady's Smock"), leaves all pinnated and with- 

 out stipules, leaflets petiolate radical ones roundish, statn. 

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

 Lighlf.p.348, and p. 1104 (C. par in flora). E. B. 1.492. 



HAB. Moist shady places, and among rocks and by the sides of rivu- 

 lets, plentiful. Ft. May, June. O . 



Varying much in luxuriance according to soil and situation. From \ 

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

 sometimes zigzag (the C.jtexuosaofWith.ond Hop!:.). Leaflets more 

 or less angled or toothed, upper ones ovate : varying- also extremely 

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

 small, white. 



** Leaves undivided, 



6. C. IcHldi folia (Daisy -leaved Lady's Smock], leaves simple 

 ovate entire upon rather long footstalks. E. B, t. 2355. 



HAB. Gathered in Scotland by Mr. Milne, formerly curator of the Ox- 

 ford Bot. Garden, E. Bot. FL Aug. 7/ . 



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

 long footstalks. Flowers few, small, white. Very near C. alpin-a. 



12. ARABIS. 



1. A. hispida (short-podded Rock- Cress), radical leaves si nuato- 

 lyrate lengthened below into footstalks, cauline ones mostly 

 undivided glabrous, fruit-bearing peduncles spreading half as 

 long as the pods. Br. Light/, p. 317. t. 15 (Cardamme 

 pelrcea). E. B. t. 409 (Cardamme hastulaia). 



ILva. Moist rocks by the sides of rivulets, near the summits of the 

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

 Bdike-val, in the Isle of Rum, abundantly, and Ben-na-Cailleach, 

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

 Anderson and Light f. Ben More, in Mull, Maugh: Fl. July. If. . 



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

 cauline ones few, toothed or entire. Flowers small, whitish, or with 

 a purplish tinge. 



2. A. thaliana (common Wall-Cress], leaves subdentate pilose, 

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

 stem branched, pods ascending. JLighlf. p. 358. E. B. 

 t. 901. 



HAB. Walls, dry banks, and gravelly soils, common. Fl. Apr. May. 0. 



