THLASPP. 



fummit. S fells two in each cell. This fpecies appears 

 nearly related to the foregoing, nor fliould we be greatly 

 furprifed if they proved one and the fame. If Bauhin's 

 delineation of the pouch of the former be correft, they mud 

 be diftii.a. 



3. Th. arvenfc. Common Penny-Crefs, or Smootli Mith- 

 ridate Muftard. Linn. Sp. PI. 901. Willd. n. 3. Fl. 

 Brit. n. I. Prodr. Fl. Grsc. n. I. Engl. Bot. t. 1659. 

 Curt. Lond. fafc. 6. t. 43. Fl. Dan. t. 793. (Tii. Diof- 

 coridis ; Gcr. Em. 262. Th. fecundum ; Matth. Valgr. 

 V. I. 519. Camer. Epit. 337.) — Pouch orbicular, com- 

 preffed, entire at the bafe. Leaves oblong, toothed, 

 fmooth. — Native of cultivated fields, in mofl parts of 

 Europe, but not frequent in England. It is annual, flow- 

 ering in June and July. Dr. Sibthorp met with it in the 

 countries north of Greece. The root is fmall, and tapering. 

 Whole plant fmooth, about a foot high, branched ; the 



jiem leaty, angular upwards. Leaves two or three inches 

 long, clafping the ftem with their arrow -(haped bafe ; their 

 edges wavy and toothed. Floivcrs numerous, fmall, white. 

 Pouch large, ereft, almoft perfeftly orbicular. Style much 

 Ihorter than the notch in which it Itauds. Seeds numerous. 

 The warm pungent tafte of this plant is combined with a 

 difagreeable garlick flavour. The feeds, as obferved in 

 Engl. Bot. " make an ingredient in that naufeous oppro- 

 brium of pharmacy, the Mithridate Confeftion, the receipt 

 for which may be found, with many excellent critical re- 

 marks, in Lewis's Difpenfatory." See Mithkidate. 



4. Th. all'iaceum. Gailick Baflard-Crefs. Linn. Sp. 

 PI. 901. Willd. n. 4. Ait. n. 2. Jacq. Ic. Rar. t. 121. 

 (Th. allium redolens ; Morif. feft. 3. t, 18. f. 28.) — Pouch 

 nearly obovate, tumid, with a narrow border. Leaves ob- 

 long, obtufe, fmooth, fomewhat toothed. — Native of the 

 fouth of Eur'ope. An annual herb, much refembling the 

 laft, but the leaves are blunter, and lefs toothed. The 

 pouches are very different, having but a flight border at their 

 upper part only, their bafe being wedge-fhaped. 



5. Th. Pfychme. Long-ftyled Baftard-Crefs. Willd. n. 5. 

 (Pfychine itylofa ; Desfont. Atlant. v. 2. 69. t. 148. 

 Burfa pattoris hirfuta, erncae flore, ftilo prominente ; Shaw 

 Afric. n. 91. f. 91.) — Pouch abrupt. Style prominent. 

 Leaves heartfhaped-oblong, toothed, downy, clafping the 

 ftem. — Native of the borders of fields in Barbary. Root 

 annual. Herb larger than the foregoing, and clothed with 

 hoary hairs. Leaves rounded, not acute, at the bafe. 

 Floivers pale yellow, as large as the Common Muftard. 

 Pouch wedge-fhaped, or triangular, being quite abrupt at 

 the end ; the Jlyle, which is as long as the whole pouch, 

 ftanding prominent at the fummit. Willdenow is certainly 

 correft as to the genus. 



6. Th./axatik. Rock Baftard-Crefs. Linn. Sp. PI. 901. 

 Willd. n. 6. Jacq. Auftr. t. 236. ( Lithothlafpi quartum, 

 carnofo rotundo foHo ; Column. Ecphr. 279. t. 277. f. 2. 



- Aethionema faxatile ; Br. in Ait. Hort. Kew. v. 4. 80.) — 

 Pouch nearly orbicular ; concave above ; convex below. 

 Stems moftly fmiple. Leaves linear-lanceolate, flefliy, ob- 

 tufe. — Native of dry hills, and the clefts of rocks, in Italy, 

 Auftria, Switzerland, Greece, and the fouth of France, 

 flowering in April and May. The root is perennial, and in 

 fome degree woody, though generally marked as annual. 

 Stems annual, afcending, fix or eight inches higii, round, 

 leafy, rarely lubdivided. Leaves numerous, fcattered, on 

 fhort ftalks, glaucous, fmooth, entire, three quarters of an 

 inch long ; the lower ones rather elliptical. Flowers 

 fmall, pink, numerous, in denfe terminal corymbs, foon elon- 

 gated into lax chijlers of glaucous ^ouiriw, tinged with pink, 

 each on a flender, fpreading, partial ftalk ; their border 



broad, ftrtated, fomewhat crenate, emarginalc at -the top 

 only, where the minute Jlyle is fituated. The fhrubby 

 habit, glaucous hue, and very pretty little red Jlotvers wrth 

 a pale-green calyx, render this one of the mofl elegant plants 

 of its natural order. Iberis fnxalilis, Linn. Sp. PI. 905, 

 dillinguifhed from this by the accurate Fabius Columna, and 

 figured in the fame plate of his work, is fo like it, that they 

 are hardly to be known afunder, except by the unequal 

 petals, proper to Iberis, and the downinefs of this latter plant. 

 On a clofe comparifon, the fhapes and furfaccs of their 

 feed-vejtis will be found cllentialiy different. 



7. Th. montanu-m. Mountain Ballard-Crefs. Linn. Sp. 

 PI. 902. Willd. n. 9. Ait. n. 7. Jacq. Auftr. t. 237. 

 (Th. montanum, burfx paftoris fruftu ; Column. Ecphr. 

 275. t. 276. f. I. Th. precox ; Wulf in Jacq. Coll. 

 v. 2. 124. t. 9. Lepidium n. 518 ; Hall. Hift. v. I. 223. 

 /3. Th. alpinum ; Jacq. Auftr. t. 238. Willd. n. 10. 

 Crantz Auftr. fafc. I. 25. t. 3. f. i. (Th. minimum; 

 Arduin. Spec. 2. 33. t. 15. f. 2.) 



Pouch inverfely hearl-iliaped. Leaves fmooth, nearly 

 entire ; radical ones obovate, ftalked ; the reft fefiil?, clafp- 

 ing the ftem. Petals thrice as long as the calyx. Stems 



fimple Native of ftony places, on the lofty mountains 



of Switzerland, Auftria, Dauphiny, and Italy, flowering in 

 April or May. The roots are perennial, long, fubdivided 

 at the fummit, each trailing fhoot crowned with a tuft of 

 obovate leaves, rarely a little ferrated, their fize, and the 

 length of their footjlalis, varying according to luxuriance 

 of foil, or a jnore or lefs elevated place of growth. From 

 the centre of each tuft arifes a folitary, fimple, afcending 

 or upright _/?««, from three inches to a fpan long, round, 

 fmooth, clothed with numerous, alternate, feflile, cordate 

 or arrow-fhaped, very rarely toothed, leaves, whofe bafe is 

 more or lefs elongated and acute ; their length three 

 quarters of an inch. Floivers in folitary terminal corymbs, 

 numerous, lai-ge, white and handfome ; their broad, obo- 

 vate, fpreading petals at leail thrice as long as the fmooth, 

 often purplifh, calyx. Pouch tapering at the bafe ; more 

 or lefs deeply lobed at the end, with a Jlyle almoft as long 

 as itfelf, projefting far beyond the lobes. Seeds naturally 

 two in each cell, as Jacquin defcribes them. Haller found 

 one only. This may be accounted for from their bemg 

 often abortive, as indeed are generally mofl of the pouches 

 themfelves, the plant increafing much by root. Having 

 had occafion to ftudy this and the neighbouring fpecies 

 very minutely, in our invcftigation of Swifs and Britifti 

 plants, we can with confidence maintain the corrednefs of 

 our fynonyms, on the authority of original fpecimens. 

 Our g alone is entitled to be diftinguiflied as a vai-iety, and 

 that an infignificant one, being merely rendered fmall in 

 fize by its very elevated or expofcd fituation. The faith- 

 ful Jacquin himfelf evidently miftrufted tliis fuppofed 

 fpecies, though he fays it retained the fame habit when 

 cultivated. 



8. Th. alpcp-e. Alpine Shepherd's Purfe. Linn. Sp. 

 PI. 903. Willd. n. 12. Fl. Brit. n. 5. Engl. Bot. t. 81. 

 Ait. n. 6. (Th. follis globularia; ; Raii Syn. ed. 2. 175-. 

 ed. 3. 301;. Bauh. Hift. v. 2. 926. Th. montanum fe- 

 cundum badenfe ; Cluf. Hift. v. 2. 131. Th. albi fupini 

 varietas; Ger. Em. 268. f. 2. Lepidium n. 519 ; Hall. 

 Hift. V. I. 223, on the authority of fpecimens from Davall 

 and DuCros.) — Pouch obovate, abrupt, fomewhat heart- 

 fljaped, with many feeds. Stem-leaves arrow-fhaped. Stems 

 fimple. Style prominent. — Native of mountainous paftures 

 in Switzerland and England, flowering in June and July. 

 It abounds on limeftone rocks, :ind about lead-mines, in 

 Yorkftiire and Derbyftiire. Many authors have confounded 



this 



