221 
ARABIS ARENOSA. 
Purple-flowered Arahis, 
TETRAD YNAMI A SILIQUOSA Nat. Ord. CRUCIFERM. 
Oen. Char. — Siliqua linearis, stigmate subsessili coronata : valvis venosis v. 
nervosis. Semina uniseriata. Cotyledones accumbentes. Calyx erectus. 
—Br. 
Arabis arenosa ; foliis caulinis sinuato-pinnatifidis petiolatis, pube ra- 
mosa ; caule hispido, pilis simplicibus ; petalis calyce triplo longiori- 
bus. — Br. 
Arabis arenosa. Scop. Cam. 337- t. 40.— Brown, in Hm-t. Ketv. ed. 2. v. iv. 
p. 106. De Cand. Syst. Veg. v. ii. p. 232. 
Sisymbrium arenosum. Linn. *S^. PI. p. 919. — Willd. Sp. PL v. iii. p. 498. 
Root small, simple, fusiform, annual, producing a few fibres ; bearing at the 
top one or several erect, flexuose, terete, simple or slightly branched 
stems; these are hispid at the base, with patent, simple, rarely branch- 
ing white hairs. Leaves mostly radical, spreading, from 2-3 inches 
long, upon rather \ong footstalks, lyrato-pinnatifid, the ultimate segments 
large, frequently triangular, the rest lanceolate, spreading, or often a 
little decurved ; they are hispid, with branched hairs. The cauline 
leaves are more deeply pinnatifid, with linear segments, almost glabrous. 
FloTvers rather large and handsome, of a pale lilac colour. Pedicels ^ an 
inch long, glabrous. Calyx of 4, leaflets, erect, hispid, green, 2 oppo- 
site ones larger than the other 2, and gibbous at the base. Petals much 
longer than the calyx, spreading, obovate, retuse, clawed. Stamens a little 
longer than the calyx. Pistil scarcely exceeding the stamens. Fruit : 
Siliqua about 2 inches long, patent, slender, linear ; the valves scarcely 
veined, glabrous. 
Native of rocky places and vineyards in sandy situations in 
the south of Europe, and a very desirable plant in our gardens ; 
for it blossoms early (April), and makes a very beautiful ap- 
pearance with its deeply cut dark green leaves, and large showy 
flowers. 
VOL. Ill, 
