Druba.] TETRADYNAMTA — SII.ICULOSA. 249 



radical leaves petiolate cordato-reniform entire or sinuated, cau- 

 liiie ones sessile oblong sinuated. E. Bot. t. 351. 



Hocks and muddy places by the sea-coast ; as well as on the elevated 

 mountains. Dr Hughes finds a var. with the leaves oblong, b\' no means 

 heart-shaped, Fl. May, June. 0. Leaves succulent, more or less en- 

 tire ; caulinc ones semi-amplexicaul, their bases generally toothed. 



2. C. GrcenlancUca, L. (^Greenland Scurvy - Grass^ ; pouch 

 globose, leaves kidney shaped (or cordate) fleshy entire, upper- 

 most oblong. E.Bot. t. 2403 C. officinalis, var. Hook. Scot. i. 



p. 195. 



Sea-shores and Highland mountains. FL June, July. ©. — This has 

 the leaves of the following, and the pouch of the preceding species ; 

 from which latter I fear it is not distinct. It is frequent on the High- 

 land mountains, and is there more dwarfish. 



3. C. Anglica, L. (^English Scurvy-grass') ; pouch elliptical 

 veiny, radical leaves petiolate cordate entire, cauline ones mostly 

 sessile oblong more or less toothed near the base. E. Bot. t. 

 552. 



Muddy and rocky sea-shores and margins of salt rivers ; frequent. 

 Snowdon. Fl. Maj% June. 0. — Generally smaller than C. officinalis, 

 with more entire leaves and ellijitical pouches. 



4. C. Ddnica, L. (^Danish Scurvy -grass); pouch ovato-ellip- 

 tical veiny, leaves all petiolate nearly deltoid. E. Bot. t. 697. 



Sea-coast in a stony and muddy soil, frequent. Fl. May. The 



smallest of the species, with very angular and stalked leaves. 



5. C.*Armordcia, L. (Horse Radish); pouch oblong, stigma 

 dilated nearly sessile, radical leaves oblong on long footstalks 

 crenate, cauline ones elongato-lanceolate serrate or entire. E. 

 Bot. t. 2323. 



Said to be wild in the mountainous parts of the north of England]; and 

 mentioned as a native of Scotland, by Sibbald ; but it is too often the 

 outcast of gardens. FL Ma}'. If. — Roots long, running deep into the 

 ground ; well known at our tables, and esteemed for their pungent fla- 

 vour. Leaves much veined. Fruit compressed, seldom perfect. 



13. SuBULARiA. Linn. Awl-wort. 



1. S. aqudtica, L. (Aivl-wort). E. Bot. t. 732. Hook, in 

 FL Lond. N. S. t. 135. 



Shallow margins of alpine lakes, frequent. FL July. If. — Roots of 

 numerous, long, white fibres. Leaves few, radical, awl-shaped, 1 — 3 

 inches long. Scape 2 — 4 inches high. Flowers small, which I have 

 seen in perfection though entirely submerged. Pouch nearly approach- 

 ing that of Draba, but with more turgid or convex valves. Embryo 

 with its cotyledons linear, long, and the curvature takes place above the 

 base of the cotyledons, not at the very base as in most other CrucifercB. 



14. Draba. Linn. Whitlow-grass. 



1. D. verna, L. (common Whitloiv-grass); scapes naked, petals 

 deeply cloven, leaves lanceolate somewhat toothed hairy. E. 

 BoL t. 586. — Erophila vulgaris, DC. — /3. pouch swollen. 



