44 
BRITISH WILD FLOWERS. 
3.— THE ALPINE PENNY-CRESS. (Thlaspi alpestre, Lin.) 
Engravings. —Eng. Bot., t. 81; 2nd ed., t. 899. I Style prominent beyond the margin of the obovate abrupt silicula. 
Specific Character. —Stem-leaves arrow-shaped. Stems simple. | ( Smith.) 
Description, &c. —This species is perhaps the most common of any belonging to the genus, as it is found 
on limestone rocks in every part of Great Britain. The leaves are as glaucous, but more succulent than those 
of the preceding species, to which it bears considerable resemblance, though it is much handsomer and larger in 
all its parts. It is a perennial, and flowers in June and July. 
All the species belonging to the genus Thlaspi are never found but in calcareous soils. 
GENUS XIII. 
THE ROCK PEPPER-WORT. (Hutchinsia, R. Brown.) 
Lin.Syst. TETRADYNAMIA SILICULOSA. 
Generic Character. — Silicula elliptical. Valves navicular, not winged. Cells two-seeded, seldom many-seeded. Calyx equal. 
Petals equal. ( Dec .) 
Description, &c.— There is only one species of this genus, which was formerly included in the genus 
Lepidium, but which has been separated on account of the cells of the seed-pod being two-seeded instead of one- 
seeded, and there being a difference in the position of the cotyledons in the seed. The name of Hutchinsia was 
given to the genus by Dr. Robert Brown, in honour of Miss Hutchins, a lady residing at Bantry, in Ireland, 
who paid great attention to the botany of her native country. 
1.—THE COMMON ROCK PEPPER-WORT. (Hutchinsia petrasa, R. Brown.) 
Synonyme. —Lepidium petrseum, Lin. \ Specific Character. — Leaves pinnate, entire. Petals scarcely 
Engravings. —Eng. Bot., t. Ill ; 2nd ed., t. 901. | equal to the calyx. Stigma sessile. Seeds two in each cell. (Smith.) 
Description, &c.— This is an exceedingly pretty little plant, seldom growing above two or three inches 
high, with delicate pinnate leaves, which are beautifully tinted in the autumn, and small white flowers. It is an 
elegant little plant, growing upon limestone rocks and old walls in various parts of England, particularly in 
the western counties. It is an annual, and flowers in March and April. 
TEESDALIA NUDICAULIS, R. Br., 
Is another dwarf plant belonging to this division of the Cruciferm. It was formerly included in the genus 
Iberis, and it is frequently found on sandy banks or heaths. The radical leaves, which are lyre-shaped, grow in 
a tuft close to the ground, and from them rise a few naked flower-stalks. The plant is an annual, and the 
flowers appear in May and June. 
GENUS XIY. 
THE CANDY-TUFT. (Iberis, Lin.) 
Lin. Syst. TETRADYNAMIA SILICULOSA. 
Generic Character. —Two exterior petals larger than the others. Silicula much compressed, truncate-emarginate. 
Seeds ovate, pendulous. (Dec.) 
Description, &c. —The genus Candy-tuft is well known by the numerous exotic species of it which are 
common in our gardens. The only British kind is also occasionally cultivated; but it is very inferior in 
