30 CRUCIFER^E. 
undivided toothed, upper I. undivided, pouch triangular-obcordate. 
— E. B. 1485. R. 4229. — Varying greatly in the form and divi- 
sions of its leaves but easily known by its peculiar pouches. — A 
common weed. A. III. — X. Shepherd's Purse. 
Tribe IX. Subulariece. 
30. Subularia Linn. 
1. S. aguatica (L.). The only species.— E. B. 732. R. 4232. 
Hook. Land. 135. — Cotyledons only once folded, but they are in 
a continuous straight line with the radicle and then curved back 
upon themselves above their base, therefore incumbent not bi- 
crures. Plant small, subaquatic. L. linear- subulate, radical. 
Root of numerous long white fibres. Fl. small, often perfected 
under water. — Margins of alpine lakes. P. VII. Awl-wort. 
Tribe X. Senebierece. 
31. Senebiera DeCand. 
1 . S. Coronopus (Poiret) ; pouch undivided reniform crested 
with little sharp points, style prominent, 1. pinnatifid. — E. B. 
1660. R. 4210. St. much branched, prostrate. Fl. small, white, 
in lateral clusters. Pouches large, in dense clusters. Cotyle- 
dons in this and the following species forming a slight angle with 
the radicle, then curved back upon themselves and afterwards 
their points parallel to the radicle ; therefore the bend is above 
the base of the cotyledons, not at their base as is usual in Cruci~ 
fera. — Waste ground, common. A. VI. — IX. 
2. S. didyma (Pers.) ; pouch notched of two wrinkled lobes, 
style extremely short, 1. pinnatifid. — E. B. 248. R. 4209.— St. 
spreading, prostrate, a foot or more in length. Fl. small white 
in long slender lax clusters. — Waste ground near the sea in the 
south and south-west. A. VII.— IX. E. I. 
Suborder IV. Nucumentaccce. Tribe XI. Isatidece. 
32. Isatis Linn. 
fl. tinctoria (L.) ; " radical leaves copiously crenate, those 
of the stem entire, pouch abrupt smooth thrice as long as broad." 
— E. B. 97- R. 4177.—*' In cultivated fields in the east of En- 
gland, but rare. B. VII." Dyer's IVoad. - 
Suborder V. Lomentucea-. Tribe XII. Cakilinea, 
33. Cakile Guert. 
1. C. maritima (Scop.) ; joints of the pouch 2-edged, the up- 
per one with 2 teeth at the base, 1. fleshy pinnatifid somewhat 
toothed. — E. B. 231. R. 4158. — Fl. purplish. Pouches an inch 
