400 ORD. XXII. Siliquose. 
COCHLEARIA ARMORACIA. HORSE -RADISH. 
eam ec SRR AE TT 
SYNONYMA._ Raphanus rusticanus. Pharm. Lond. & Edinb. 
~ Bauh. Pin. p. 96. Gerard. Emac. p. 241. Park. Theat. p. 860. 
Raii Hist. p. 818. Synop. p. 301. Hist. Ox. iti. t. 7. f. 2. Nas- 
turtium foliis radicalibus lanceolatis crenatis, caulinis incisis. 
Hal. Siirp. Helv. n. 504. Cochlearia Armoracia. Huds. Ang. p. 
284. Withering Bot. Arr. p. 681. Relhan Flor. Cant. p. 249. 
Class Tetradynamia. Ord. Siliculosa. Lin. Gen. Plant. 803. 
Ess. Gen. Ch. Silicula emarginata, turgida, scabra: valvulis gibbis, 
obtusis. 
Sp. Ch. C. foliis radicalibus lanceolatis crenatis; caulinis Incisis. 
THE root is perennial, long, tapering, white: the stalk is round, 
erect, branched, smooth, and rises two or three feet in height: the 
radical leaves are very large, lance-shaped, scolloped at the edges, 
and stand on strong footstalks; those of the stalk are much smaller, 
narrow, and often divided at the edges: the flowers are white, nu- 
merous, and terminate the branches in thick clusters: the calyx is 
composed of four leaves, which are egg-shaped, concave, opening, 
and deciduous: the corolla consists of four inversely egg-shaped — 
petals, which expand in opposite directions, and form a cross; they 
are twice the size of the calyx, and are inserted by narrow claws: 
the filaments are six, tapering, the two opposite ones shorter than 
the other four, and all furnished with blunt compressed antherz: 
the germen is heart shaped, supporting a simple style, which is 
short, permanent, and furnished with an obtuse stigma: the capsule 
is heart-shaped, turgid, slightly notched at the end, and furnished 
with the style; it is divided into two cells, each containing about 
four seeds, It is found growing wild in many parts of England, 
particularly about rubbish and the sides of ditches; but it is com- 
monly cultivated in gardens, and flowers in May. 
