TETRADYNAMIA. SILICULOSA. Thlaspi. 759 
Differs from L. campestre in having a woody root , more oblong and less 
tumid pouches, whose sides are often very hairy, and when destitute of 
hairs are but obscurely dotted, never so scaly as in that species. Petals 
much larger, and more conspicuous; but the most decisive mark, ob¬ 
serves Mr. Leathes, is the elongated style , projecting far beyond the lobes 
of the pouch, whereas the short style of L. campestre is but just equal to 
those lobes. E. Bot. This species, for the reasons which determine the 
preceding, must be referred to the same genus. 
Hairy Mithridate Pepper-wort. Hqary Cress. L. hirtam. De 
Cand. Galp. Sm. Hook. Grev. Thlaspi hirtum. Linn. Willd. FI. Brit. 
T. campestre. Var. 3. With. Ed. 5. It has been found in Perthshire, near 
the seat of the Earl of Kinnoul, by Mr. Miller. At Browston, Suffolk. 
Rev. G. R. Leathes. By the river Esk, between Brichen and Montrose. 
Mr. G. Don. The Editor, by the kindness of Mr. Winch, has been 
favoured with specimens from the neighbourhood of Newcastle. 
P. June. £.) 
THLAS'PI.* Pouch inversely heart-shaped, notched at the 
end; valves keeled or bordered ; cells many-seeded. 
T. arven'se. Pouch round and flat, (smooth: E.) leaves oblong, 
toothed, smooth. 
( E.JBot . 1659. E.)— Ludw. 173— FI. Dan. 793— Blackw. 68— Matth. 567— 
Ger. 204. 1— J. B. ii. 923 —Sheldr. 105—Dod. 112—Lob. Ohs. 108. 1, and 
Ic. 1. 212. 2— Ger. Em. 262. 1 —Park. 836. 1—11. Ox. iii. 17. 12 —Pet. 
50. 9. 
Leaves arrow-shaped at the base, embracing the stem. Pouches deeply 
notched. Woodw. half an inch over, broadly winged, (forming long 
clusters. E.) Stem upright, about one foot high, with seven or eight 
membranous edges. Seeds spear-shaped, but compressed, hanging or 
pointing downwards. Blossom white, very small. 
(Smooth Mithridate Mustard, E.) or Penny Cress, (from a fancied 
resemblance to a silver penny. E.) Corn-fields, especially in a muddy 
soil; (not common. In waste ground on the north-east side of Norwich. 
Mr. Rose. Near the sea at the south end of Lowestoft. Sir J. E. Smith. 
Queensferry. Mr. D. Steuart. Grev. Edin. Magilligan, Derry. Mr. 
Murphy. E.) A. June—July.f 
T. perfolia'tum. Pouch inversely heart-shaped: stem-leaves heart- 
shaped, smooth, somewhat toothed, (embracing the branched 
stem : style very short. E.) 
Dicks. H. S. — {Hook. FI. Loud. E .)—Jacq. Aust.r. 337— (E. Bot. 2354. E.) 
— Cal.Ecphr. 276. 2— Tab. Hist. 851— Pet. 50. 12. 
Blossom white, hardly larger than the calyx. Stamens longer than the 
flower; white. Anthers yellowish. Pouch like that of the common Shep¬ 
herd’s-purse. Linn. Stem about a foot high, upright, simple, but in 
gardens and rich soil branched. Leaves glaucous green, clasping the 
stem : lowermost egg-shaped, on leaf-stalks. 
* (From 0Aaa>, to strike or squeeze flat, as the seed-vessels of these plants appeav. E.) 
f The whole plant has something of a garlic flavour. The seeds have the acrimony of 
mustard. When cows eat it their milk acquires a disagreeable taste. Cows, goats, and 
swine eat it. 
