40 Flora of Devon and Cornwall, by I. W. N. Keys. 
Diplotaxis Cand. Wall-Mustard. 
D.tenuifolia(DC.)—E.B.6^6. Sinapis Sm. — Old walls, rub- 
bish, and rocks : not common. Catdown quarries!. Exeter: Rav. 
D.— New Bridge : W.D.d C. Ft. Near Launceston : Johns (H. S. 
Herb.) C. Fine-leaved Mustard. 
D. muralis (DC.) — E.B. 1090. Sinapis Sm. — Waste ground. 
Catdown quarries ! ; Mutley. I have not seen it in the latter loca- 
lity for several years. D. — On the causeway at Hayle:" Benn. 
in Phytol. 1851, p. 2. Swanpool and Mainporth, &c. : Polytech. 
1856. C. Sand-Mustard. 
Alyssum Linn. 
I A. calycinum {L.) — E.B.S. 2853. — Near Dawlish : Jord. in 
Phytol. 1845, p. 338. D. 
Koniga Adans., B. Br. 
K. maritima (R. Br.) — E.B. 17*29. Alyssum Sm. — Naturalized 
near the sea. Devil's point, Stonehouse, plentiful ; Hoe, Plymouth, 
sparingly ; Bovisand. Exmouth, " hardly wild : " Jord. in Phytol. 
1843, p. 828. Budleigh Salterton ; Exmouth sands : D. — 
Beach, Kiln quay, Mylor : Miss W. (H. S. Herb.) Scilly islands, 
one specimen : Towns, in Journ. Bot. ii. 107. C] 
Draba Linn. Whitlow-grass. 
D. muralis (L.) — E.B. 912. — Walls. Carclew, near Falmouth : 
Miss W. (H. S. Herb.) C. 
Mr. H. C. Watson admits it into his list for Cornwall, but thinks the 
authority unsatisfactory. 
D. verna (L.) — E. B. 586. — Very common on walls and banks. 
Plentiful about Plymouth ; on the bridge at Weston mills ; Long- 
bridge, on the Plym ; Mount Batten. D. — Torpoint. " Common 
on the coast : " Pasc. in Bot. Gaz. ii. 38. Collected at Penryn by 
W. P. Cocks, but the habitat is now said to be destroyed : Polytech. 
1856. C. Common Whitlow- grass. 
