CL. XV.] TETRADYNAMIA SILIQUOSA. 275 



wild. Eng. Bot. vol. xxvii. pi. 1935 : Cheiranthus incanus. Eng. Fl. 

 vol. iii. p. 205. 976. 

 2. M. sinudta. Great Sea Stock. Stem herbaceous, with spreading 

 branches : leaves sinuate, obtuse, downy ; those of the branches undi- 

 vided ; pods rough, with prominent glands. The whole plant covered 



with dense starry hairs and short glandular prickles : stem two feet high : 

 flowers purple. Biennial : flowers from May to September : grows on 

 sandy sea-shores in England : rare. Eng. Bot. vol. vii. pi. 462 : Chei- 

 ranthus sinuatus. Eng. Fl. vol. iii. p. 206. 977. 



21. BARBARE'A. WINTER-CRESS. 



Calyx of four oblong, concave, erect, deciduous leaves. Petals 

 inversely egg-shaped, undivided, their claws nearly as long as the 

 calyx. Filaments awl-shaped, erect, -with a gland on each side 

 within the shorter ones. Germen oblong, four-sided. Style short, 

 cylindrical ; stigma obtuse. Pod linear, four-sided, slightly com- 

 pressed ; valves concave, keeled, even ; partition membranous, 

 thick-edged. Seeds egg-shaped, flattish, arranged alternately in 

 one row. Name, from St. Barbara. 334. 



1. B. vulgdris. Bitter Winter-cress. Yellow Rocket. Lower leaves 

 lyre-shaped, with the terminal lobe roundish ; upper leaves inversely egg- 

 shaped, toothed. Stem about two feet high, stout, angular, furrowed : 



flowers small, bright-yellow, in corymbose clusters. Bitter and sharp to 

 the taste, used sometimes as a salad. Perennial : flowers from May to 

 August : grows on the banks of ditches and rivers, and about hedges 

 and walls : common. Eng. Bot. vol. vii. pi. 443 : Erysimum Barbarea. 

 Eng. Fl. vol. iii. p. 198. 978. 



2. B. prie'cox. Early Winter-cress. Lower leaves lyrate, upper deeply 



pinnatifid, with linear, entire segments. From one to two feet high : 



flowers yellow, very small. Biennial : flowers from April to October : 

 grows in waste places in various parts of England, but is not indigenous. 

 Eng. Bot. vol. xvi. pi. 1129 : Erysimum pr<ecox. Eng. Ft. vol. iii. p. 199. 



979. 

 22. ERY'SIMUM. TREACLE MUSTARD. 



Calyx of four oblong, concave, erect, deciduous leaves. Petals 

 inversely egg-shaped, obtuse, spreading, their claws erect and 

 nearly as long as the calyx. Filaments thread-shaped, erect, with 

 a gland on each side within the shorter ones; anthers oblong. 

 Germen oblong, four-sided ; style very short. Stigma small, 

 knobbed, notched. Pod four-sided, slender ; valves concave, 

 keeled, right-angled ; partition membranous. Seeds egg-shaped, 

 arranged in one row. Named from eryo, to cure. 335. 



1. E. cheiranthoides. Treacle Mustard. Leaves lance-shaped, ob- 

 scurely toothed, covered with forked bristles ; pods nearly erect, on the 



horizontal stalks ; stigma nearly sessile. Stem erect, branched, two 



feet high : flowers numerous, small, yellow. The seeds are used for de- 

 stroying worms in children. Annual : flowers in July : grows in corn- 

 fields : frequent. Eng. Bot. vol. xiv. pi. 942. Eng. Fl. vol. iii. p. 201. 



980. 



