CRUCIFEKiE. 



07 



XIII. COCHIiEARIA. COCHLEAKIA. 



Annuals or perennials, usually glabrous, with undivided leaves, and 

 white flowers. Filaments of the stamens without appendages. Pod 

 globular, ovoid or shortly oblong, with a broad partition ; the valves 

 very convex. Seeds several in each cell, not bordered, the radicle ac- 

 cumbent on the edge of the cotyledons. 



Besides the common northern species, the genus contains several 

 Asiatic and south European ones, some of them intermediate, in ap- 

 pearance, between the two rather dissimilar ones here associated. The 

 pod is very different from that of any other British white-flowered 

 Crucifer. 



Tall erect plant, with very large oblong radical leaves . . 1. Horseradish C. 

 Low diffuse plant, the leaves small and thick 2. Scurvy C. 



Horseradish Cochlearia. Cochlearia Armoracia, Linn. 



(Fig. 83.) 



(Eng. Bot. t. 2323. Armoracia rusticana, Brit. Fl. Horseradish. 



Rootstock tapering into a long root. 

 Radical leaves on long stalks, often 6 

 inches to a foot long, and 4 to 6 inches 

 broad, sinuate and toothed at the edges, 

 glabrous, but rough. Stems 2 to 3 feet 

 high, erect ; the leaves smaller and nar- 

 rower than the radical ones, the lower 

 ones often deeply toothed or almost pinna- 

 tifid. Flowers small and white, in numer- 

 ous racemes, forming a terminal panicle. 

 Pods on slender pedicels, ovoid or ellip- 

 tical, without any prominent nerve. 



A plant of south-eastern origin, intro- 

 duced by cultivation only into northern 

 and western Europe. It has become 

 perfectly naturalized in several parts of 

 Britain, especially near the sea. Fl. 

 summer. The pod seldom comes to per- 

 fection in this country. 



Fig. 83. 



2. Scurvy Cochlearia. Cochlearia officinalis, Linn. (Fig. 84.) 



(Eng. Bot. t. 551, and C. grcsnlandica, t. 2403. Scurvy -grass.) 



A low, diffuse, quite glabrous, and somewhat fleshy annual or biennial, 

 the stems seldom above 6 inches long. Lower leaves stalked, orbicular 



