24 CRUCIFER^E. [Erysimum. 



Waste places, and by way-sides, plentiful. Fl. June, July. 0. 

 One or two feet high, branched. The deep and cut serrated lobes are 

 not always sufficiently decurved to constitute a runcinate leaf ; the 

 terminal lobe is very large, roundish in the lower leaves, and oblong in 

 the upper ones. Flowers very small, pale yellow. 



2. S. irio 9 Linn. Broad Hedge- Mustard, London Rocket. 

 Leaves runcinate toothed, and as well as the stem glabrous ; 

 pods nearly erect. Br. Fl. 1. p. 305. E. FL v. iii. p. 197. 

 E. Bot.t. 1631. 



Waste grounds, rubbish, and way-sides, common, especially near 

 large towns ; very common about Dublin. It covered the ground in 

 the spring after the great fire in London. Haller records the same 

 tendency in the preceding species, Smith. FL July, Aug. 0. 

 Flowers yellow. Pods two inches long, erect. 



3. S. Sophia, Linn. Fine-leaved Hedge- Mustard, or Flix- 

 weed. Leaves doubly pinnatifid, slightly hairy ; lobes linear or 

 oval ; petals shorter than the calyx. Br. FL 1. p. 306. E. FL 

 v. iii. p. 197. E. Sot. t. 963. 



Waste places, among rubbish and sandy grounds, frequent. Very 

 common near Dublin. FL Aug. 0. Two feet high, branched. 

 Flowers small, yellow. Pods linear, slender, erect, but not appressed, 

 the footstalk being a little patent. 



4. S. thalianum. Common Thole-cress. Leaves somewhat 

 toothed, hairy; radical ones oblong subpetiolate ; stem branched; 

 pods ascending. Br. Fl. 1. p. 306. E. FL v. iii. p. 209. 

 Arabis thaliana, Linn. E. Bot. t. 901. 



Walls, dry banks, and gravelly soils ; not very common about Dub- 

 lin. On walks between Step-aside and the Scalp. Old walls, Friar's 

 Walk, Cork ; Mr. J. Drummond. Fl. April, May. 0. Six to ten 

 inches high, slender, with few leaves, and those mostly radical. Flowers 

 small, white. The colytedons are incumbent here, not accumbent as 

 in the true Arabis. Hook. 



13. ERYSIMUM. Linn. Treacle-mustard. 



Pod 4-sided. Seeds not margined. Cotyledons incumbent 

 (O||). Stigma capitate, sometimes emarginate, with the 

 lobes patent. Cal. erect. Br. Name from epvw, to cure, on 

 account of the supposed virtues of the plant. 



Tetradynamia. Siliquosa. 



1. E. cheiranthoides, Linn. Worm-seed, Treacle-mustard. 

 Leaves lanceolate, entire, or slightly toothed, with stellate-tri- 

 partite hairs ; pods nearly erect, their pedicels spreading ; stigma 

 undivided, nearly sessile. Br.Br. Fl. \.p. 306. E. Fl. v. 

 iii. p. 200. E. Bot. t. 942. 



Fields, gardens, and waste places. Sunday's Well, near Cork ; Mr. 

 J. Drummond. Fl. July, Aug. .One or two feet high, branched. 

 Flowers small, yellow. 



2. E. Alliaria, Linn. Jack by the Hedge, or Sauce alone. 



