ies 



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AUidria.'] VI. cudcifer^ : sisymbrie^. 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 ot a 

 leaf or leaf-like bractea.) 



2. S. rrio L. (hroad H., London Rocket) ; leaves runcinate 

 toothed and as well as the stem glabrous, pods terete nearly 

 erect, i?. J5. t. 1631. 



Waste places, chiefly about London, where it covered the ground 

 immediately after the great fire in 1666. Faulkbourn, Essex. Ber- 

 wick-upon-Tweed. Dublin. ©. 7,8. — F/owers yellow. Pods 2 

 inches long, erect, about four times longer than the pedicels. ^ 



3. S. SopJiia L. {fine-leaved H"., or Flax-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, i^fowers small, 

 yellow. Pods terete, linear, slender, erect, but not appressed, about 

 three times longer than the somewhat patent pedicels. 



4. S. thalianum Hook, (common Thale-cress) ; leaves some- 

 what toothed downy, radical ones oblong subpetiolate,_ stem 

 branched, pods ascending terete with 4 angles. Arabis L.: 

 E. B. t. 901. 



Walls, dry banks, and gravelly soils, common. ©. Spring and 

 autumn. — Six to ten inches high, slender, with few haves, 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 ;5orfs are not compressed; from Erysimum it 

 differs by the hairs on the leaves being spreading aud not appressed. 



20. kTiAAhiiK Adans . Garlic-Mustard. 



Po^ rounded; valves with one conspicuous nerve and two 

 slender branched nerves or veins. Hypogynous glands between 



Seeds striate, their stalks flat and winged. 



Stigma" enWve. Cal. slightly spreading, equal at the base.— 

 Named from Allium, or garlic, which its leaves resemble m their 



odour. 



ifficindlisTtC. (common G., Jack-hy-the-hedge, or Sauce- 

 alone). Erysimuria Alllaria L. : E. B. t. 796. 



Hedge-banks and waste places. $. 5, 6. — 2 —3_ feet high, 

 branched. Leaves large, 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 SisymhThvtr.. 



c 6 



the longer filaments. 



