21 



Ord. CRUCIFER^E. Lindl., Yeg. K., p. 351 (Brassicacea) ; Le 



Maout & Dec., p. 221 ; Baill., Hist. PL, iii. 

 Tribe Alyssinece. 



Genus Cochlearia,* Linn. B. & H., Gen., i, p. 75 ; Baill., Hist. 

 PL, iii, p. 270. Species about 30, natives chiefly of the 

 colder parts of the northern hemisphere. 



21. Cochlearia Armoxaci&rf Linn., Sp. Plant., ed.l, p. 648(1753), 



Horse-Radish. 



Syn. Cochlearia rusticana, Lam. Armoracia rusticana, Baumg. 

 Roripa rusticana, Gr. & Godr. 



Figures. Woodville, t. 145; Hayne, v, t. 29; Steph. & Ch., t. 114; 

 Nees, t. 400; Syme, E., Bot., i, t. 129; Reichenb., Ic. Fl. Germ., 

 ii, t. 17. 



Description. A large herbaceous perennial with a short thick 

 rootstock scarred by the fallen leaves, and a very long thick cylin- 

 drical root often more than an inch in diameter, nearly smooth, pale 

 brownish-yellow externally, white or very pale yellow within, giving 

 off thick horizontal branches at some distance below the surface 

 of the ground which send up vertical stolons producing at their 

 extremities new plants. Root-leaves very large, the blade 

 reaching a foot long and the petiole of equal or greater length, 

 oval- or ovate-oblong, usually subcordate and unequal at the base, 

 obtuse at the apex, coarsely and irregularly crenate, thick, 

 strongly veined, dark green. Stems 2 or 3 feet high, erect, 

 stiff, smooth, striate, hollow, much branched in the upper part, 

 branches weak, slender, ascending. Stem-leaves nearly or quite 

 sessile, narrowly oval or strap-shaped, blunt, tapering below, 

 serrate, smooth. Flowers numerous, | inch wide, on long stalks 

 arranged in numerous small axillary and terminal corymbs 



* Cochlearia, a mediaeval name for the Scurvy-grass (G. ojficinalis), from the 

 shape of the root-leaves, like a spoon, cochlear. 



f Armoracia, the classical name ; but it cannot be with certainty referred 

 to the present plant, and may have been the name of the true Radish, 

 Raphanus sativus, L. 



