Baines' FI. of Yorksh. p. 10. — LGght. FI. of Sltropsh. p. 3L 1 . — Teesdalia Ibei'is, 
Dec. Syst. v. ii. p. Stitt. — Lindt. Syn. p. 28. — 1 toil's Gen. Syst. of G»rd. and Bot. 
v. i. p. 138. — Maer. Man. Brit. Bot. p. 18 .— Teesdalia irregularis. Gray’s Nat. 
Arr. v. ii. p. 633. — Iberia nudicaulis. Engl. Bot. t. 327 — Curt. FI. Lond. t. . — 
FI. Dan. t. 323. — Linn. Sp. PI. p. 907. — Huds. FI. Angl. (2nded.) p. 283. — Willd. 
Sp. VI. v. iii. pt. I. p. 438. — Sn». FL Brit. v. ii. p. 692. — With. (5th ed.) v. iii. p. 
712. — Lightf. FI. Scot. v. i. p. 346. — Abbot’s FI. Bedf. p. 141. — Davies’ Welsh Bot. 
p. 63.— Purt. Midi FI. v. i. p. 301.— Relh. FI. Cant. (3rded.) p. 263..— Thlaspi 
nudivaule, Dee. FI. Fr. l3rd ed.) v. iv. p. 708. — Nasturtium petrceum, Ray’s 
Syn. p. 393. — Bursa pastoria minima, Johnson’s Gerarde, p. 275. — Shepherd’ s 
Cress, l’etev. II Brit. t. 50. f. 2. 
I.ocalitiks. — In dry, barren, gravelly, and sandy fields, and margins of 
gravel-pits, &c. — Frequent in many counties of ENGLAND, WALES, and 
SCOTLAND, especially in the following: — Beds; Berks; Bucks; Cam- 
bridge ; Cheshire ; Cumberland ; Derby ; Devon ; Essex ; Hants ; Leicester ; 
Middlesex; Norfolk; Northam]>ton ; Northumberland; Notts; Salop; 
Stafford; Suffolk; Surrey; Sussex ; Warwick ; Westmoreland ; Worces- 
ter; York; — Anglesea ; Denbigh; Glamorgan ; Montgomery ;— Aberdeen ; 
Ayr; Berwick; Elgin; Forfar; Lanark ; Perth; and Roxburgh . — It lias 
not. 1 bel eve, been found in IRELAND. 
Annual. — Flowers in May and June. 
Root slender, tapering, with whitish fibres. Stems several, from 
2 to 5 inches high, upright or spreading, slightly leafy, the central 
on.’ quite straight, and always naked. Leaves numerous, spreading 
on the ground, almost entirely radical, partly undi ided, but mostly 
pinnatitid in a lyrate manner, segments rounded, often slightly 
hairy at the edges, otherwise smooth. Flowers small, white, in a 
terminal corymb, which elongates into a spike-like raceme as it 
advances in flowering. Sepals egg-spear-shaped, concave, equal, 
reddish. Petals unequal, the two outer thrice the size of the other 
two. Stamens always 6, remarkable for their large white scales 
(see fig. 5 ), which were first observed in this species by the late 
Mr. Sowerby. Pouch ( silicic ) (see fig. 6.) somewhat inversely 
heart-shaped, laterally compressed, concave on one side, convex on 
the other, bordered with a projecting margin, and marked with a 
perpendicular line, which is the edge of the partition. Valves 
keeled, smooth, veiny. Seeds 2 in each cell, round, compressed, 
very minutely dotted. 
There is another species, the Teesdalia regularis of Smith, 
( Lepidium nudicaule of Linnaeus,,/ which is said so precisely to 
resemble our plant in habit, as to have been sometimes confounded 
with it ; but it may be readily distinguished by its petals being 
equal, and by its having usually only 4 stamens, very rarely 6. 
It is, moreover, entirely exotic, having never been found wild in 
Britain, but appears to be confined to the south of Europe, where 
it inhabits sandy, barren, somewhat wooded places, especially in 
Spain and Portugal. Our plant, on the contrary, is found only in 
the more northern parts of Europe, as in Britain, France, Germany, 
Denmark, and Sweden. — Some interesting observations, by the late 
Sir J. E. Smith, relating to the history, &c., of these two curious 
little plants, may be seen in the 1 1th volume of The Transactions 
of the Linnean Society of London, p. 283 to 287. 
