Alliaria.'] vi. crucifers : sisymbriE 2 E. 35 
is very large, roundish in the lower leaves, and oblong in the upper 
ones. Flowers very small, pale yellow. 
( S. polyceratium L. has been found about Bury St. Edmunds, but is 
certainly not indigenous : in it the pods are subulate as in the last, 
but spreading and usually three together, and sessile in the axils of a 
leaf or leaf-like braetea.) 
2. S. l'rio L. ( broad II., London Rocket ) ; leaves runcinate 
toothed and as well as the stem glabrous, pods terete nearly 
erect. E. B. t. 1631. 
Waste place®, chiefly about London, where it covered the ground 
immediately after the great fire in 1666. Faulkbourn, Essex. Ber- 
wick-upon-Tweed. Dublin. ©. 7, 8. — - Flowers yellow. Pods 2 
inches long, erect, about four times longer than the pedicels. 
3. S. Sophia L. ( fine-leaved II., or Flix-weed ) ; leaves dou- 
bly or trebly pinnatifid, lobes linear or linear-oblong, petals 
shorter than the calyx. E. B. t. 963. 
Waste places, among rubbish : frequent in England, more rare in 
Scotland. 0. 6 — 8. — Two feet high, branched. Flowers small, 
yellow. Pods terete, linear, slender, erect, but not adpressed, about 
three times longer than the somewhat patent pedicels. 
4. S. thalidnum Hook. ( common Thale-cressi) ; leaves some- 
what toothed downy, radical ones oblong subpetiolate, stem 
branched, pods ascending terete with 4 angles. Arabis L. : 
E. B. t. 901: Benth. 
Walls, dry banks, and gravelly soils, common. 0. Spring and 
autumn. — Six to ten inches high, slender, with few leaves, and those 
mostly radical. Flowers small, white. Pods twice the length of the 
spreading pedicels ; valves convex with only one conspicuous nerve, 
as in Arahis, with which it agrees better in habit ; but the cotyledons 
are incumbent, and the pods are not compressed ; from Erysimum it 
differs by the hairs on the leaves being spreading and not adpressed. 
20. Alliaria Adans. Garlic-Mustard. 
Pod rounded; valves with one conspicuous nerve and two 
slender branched nerves or veins. Hypogynous glands between 
the longer filaments. Seeds striate, their stalks flat and winged. 
Stigma entire. Cal. slightly spreading, equal at the base. — 
Named from allium, or garlic, which its leaves resemble in their 
odour. 
1. A. officinalis DC. ( common G., Jack-by-the-hedge, or Sauce- 
alone). Erysimum Alliaria L. : E. B. t. 796. 
Hedge-banks and waste places. $ . 5, 6. — 2 — 3 feet high, 
branched. Leaves large, much veined, heart-shaped, stalked, sinuato- 
den tate. Flowers white. Pods erect, on spreading pedicels. Were 
it not for the seed-stalks, this might be placed in Sisymbrium, 
c 6 
