164 



CRUCIFERyE. X. ARABIS. 



stems roughish ; pods erect, smooth. !<:. H. Native of Austria. 

 Like A. scabra in habit, but the pods are one-half narrower and 

 the seeds are hardly margined. Flowers white. 



Schiwereck's Wall-Cress. Fl. May, June. Clt. 1824. Pl.| ft. 



34 A. PETR;E'A (Lam. diet. 1. p. 221.) leaves smooth, ciliated 

 or scabrous with simple or bifid hairs ; radical ones on longish 

 stalks, entire, toothed, or lyrate, stem ones oblong-linear, entire or 

 toothed ; stem usually branched ; pods erectly-spreading ; stigma 

 capitate ; petals obovate, unguiculate. 3. H. Native of many 

 parts of Europe, also in the island of Unalaschka. 



Var. a, Crantziana (D. C. syst. 2. p. 230.) pod long. A. 

 Crantziana, Ehrh. herb. 78. A. Thaliana, Crantz. austr. 1. p. 

 39. t. 3. f. 2. Native of Austria and Transylvania in fissures of 

 rocks and among stones. Flowers white or purplish. 



Far. ft, Mspida (D. C. 1. c.) Sisymbrium arenosum, Lin. fl. 

 suec. 233. not of his spec. pi. Oed. fl. dan. t. 386. A'rabis hispida, 

 Lin. fil. suppl. 298. Welch Rocket Cress, Pet. herb. brit. t. 50. 

 f. 3. Cardamine petrae v a, Huds. an^. 293. Native of Scotland 

 and Wales on mountains in fissures of rocks and among stones. 



Var. y, hastulata (D. C. 1. c.) Cardamine hastulata, Smith, 

 engl. hot. t. 409. Horn. fl. dan. 1462. Native of Britain and 

 Norway, in the fissures of rocks and among stones. 



Var. S, Fceroensis (D. C. 1. c.) Cardamine Faeroensis, Horn. fl. 

 dan. 1382. Native of Faero island in the fissures of rocks and 

 among stones. 



Var. e, runcinata (D. C. 1. c.) A. petrae'a, Lam. diet. 1. p. 22. 

 Cardamine petras'a, Lin. spec. 913. A. runcinata, Lam. diet. 1. 

 p. 222. Native of Sweden and the Pyrenees, in fissures of rocks 

 and among stones. 



Little tufted plants with white flowers. 



Alpine Rock or Wall-Cress. Fl. June, Jul. Britain. PL ^ foot. 



35 A. AMBI'GUA (D. C. syst. 2. p. 231.) leaves smoothish, 

 radical ones sinuately-lyrate, middle ones oblong-oval, toothed, 

 upper ones oblong-linear, entire ; stem almost simple ; pods 

 rather erect. ! . H. Sisymbrium Tilesii, Led. in mem. acad. 

 petersb. 5. 1815. p. .548. Flowers white or purplish. 



Var. a, glabra (D. C. syst. 2. p. 231.) leaves and stems 

 smooth. Native of Kamtschatka. 



Var. ft, intermedia (D. C. 1. c.) leaves smooth ; stem hispid at 

 (he base. Native of Unalaschka in sandy and grassy places. 



Var. y, scabra (D. C. 1. c.) leaves pilose, scabrous; stem 

 smooth. Native of Siberia. 



Ambiguous Wall- Cress. Fl. May, June. Clt. 1824. PI. | foot. 



36 A. LYRA'TA (Lin. spec. 920.) radical leaves lyrately-pin- 

 natifid, smooth or ciliated, stem ones linear ; stem hispid at the 

 base, a little branched ; pedicels spreading a little ; pods erect. 

 T{. . H. Native of North America in cultivated fields and dry 

 hills, particularly on rocks in Pennsylvania about West Chester, 

 and from thence to Canada, extending westward to the Rocky 

 Mountains, and to the islands of the Polar seas. A'rabis petrae'a, 

 Hook. fl. bor. amer. p. 42. Flowers white. 



ft, A. Kamtschdlica (Fisch. in litt.) flowers smaller ; petals 

 twice the length of the calyx, not thrice its length, as in the spe- 

 cies, and the pods are longer and thicker. 



Lyrate-lea\eA Wall -Cress. Fl. May.Ju. Clt. 1823. PL foot. 



37 A. ARENO'SA (Scop. fl. earn. ed. 2. no. 837. t. 40.) leaves 

 villose with forked hairs, radical ones lyrately-pinnatifid, stem 

 ones deeply-toothed ; stem branched, hispid, with simple hairs ; 

 pedicels and pods spreading. $ . H. Native of middle Europe, 

 viz. Carniola, Transylvania, Germany, Alsatia, France, Spain, 

 &c. in vineyards in gravelly places and on rocks. Schrank. fl. 

 mon. 3. t. 256. Hook. exot. fl. t. 221. Sisymbrium arenosum, 

 Lin. spec. 919. Turritis arenosa, Lapeyr. abr. 387. Petals ob- 

 ovate, rose-coloured, very rarely white or blueish. Pods linear, 

 spreading. 



Var. ft, Kamtschdtica ; biennial ; stems more numerous from 



1 



the root, thicker, less branched, and less hairy ; flowers much 

 smaller ; petals obovate. $ . H. Native of Kamtschatka. 

 A. arenosa, Cham, et Schlecht. in Linnsea. I. p. 17. 



Gravel Wall-Cress. Fl. April, July. Clt. 1798. PL |. foot. 



38 A. HALLE' HI (Lin. spec. 929.) lower leaves lyrate, stalked ; 

 terminal lobe ovate ; upper leaves lanceolate, cut ; stem branch- 

 ed, slender, clothed with soft villi ; pedicels and pods spreading. 

 Tf. . $ . H. Native of moist mountainous places near rivulets 

 in Transylvania, Hungary, Piedmont, Switzerland, Austria, even 

 to the confines of Bohemia, &c. &c. Walds. et Kit. hung. 

 2. p. 126. t. 120. A. stolonifera Clairv. herb. val. 223. Lower 

 branches weak, having the appearance of runners, but not root- 

 ing. Petals obovate, white, double the length of the calyx. 



Var. ft, Kamtschdtica ; flowers smaller. If. . H. Native of 

 Kamtschatka. A. Halleri, Cham, et Schlecht. in Linnaea. 1. 

 p. 17. 



Mailer's Wall-Cress. Fl. May, June. Clt. 1816. PI. | foot. 



39 A. STOLONI'FERA (Horn. hort. hafn. 618.) radical leaves 

 somewhat lyrate, stalked ; terminal lobe cordate, stem leaves 

 oblong, sinuately-toothed ; stem stoloniferous at the base, pubes- 

 cent ; pedicels and pods spreading. I/. . H. Native of Carniola. 

 Cardamine stolonifera, Scop. fl. earn. ed. 2. no. 818. t. 39. 

 Like A. Halleri, but much smaller and slenderer, with creeping 

 rooting runners. Flower white. Pods very slender, half an 

 inch long. 



Stoloniferous Wall-Cress. Fl. May, June. Clt. 1819. PI. J ft. 



40 A. OVIRE'NSIS (Wulf. in Jacq. coll. 1. p. 196. icon. rar. 



1. t. 125.) lower leaves stalked, oval, pectinately-toothed at the 

 base, upper ones oblong, narrowed at the base ; stem weak, 

 smooth ; pods somewhat spreading, scarcely longer than the 

 pedicels. If, . H. Native in calcareous rocky moist places 

 in the Alps of Oviro, Carinthia, Transylvania, on the Carpathian 

 mountains in the region of the Pinus Mughus, &c. Rcem. fl. 

 eur. 7. t. 6. Sturn. deutchl. fl. icon. Nasturtium Ovirense, Andrz. 

 ined. Flowers pale, red, rarely white. 



Oviro Wall-Cress. Fl. June, July. Clt. 1824. PI. J to foot. 



41 A. O-WAIHIE'NSIS (Cham, et Schlecht. in Linnaea. 1. p. 

 17.) leaves repand-toothed, rather scabrous, radical ones stalked, 

 lyrately-pinnate, with about 3 pairs of leaflets, stem ones almost 

 wanting ; stem ascending, smooth, bearing flowers almost to the 

 base ; siliques erectly-spreading, 3-times longer than the pedi- 

 cels. Tf.. H. Native of the Sandwich islands, particularly in 

 O-Wahu. Root thickish. Stem numerous, proliferous at the 

 base. Flowers small, white, with oblong-entire petals, which are 

 hardly longer than the calyx. 



O-Wahu Wall-Cress. PI. 1 foot. 



42 A. CEVENNE'NSIS (D. C. syst. 2. p. 234.) leaves all stalked, 

 ovate, acuminated, grossly- toothed, somewhat velvety with small 

 hairs ; pedicels and pods spreading. $ . H. Native of the 

 Cevennes, in rugged shady places. Hesperis inodora, Gouan. fl. 

 monsp. p. 167. Flowers pale-violet, almost like those of A. 

 arenosa. Seeds brownish. Deless. icon. sel. 2. t. 26. 



Cevennes Wall-Cress. Fl. Ju. Jul. Clt. 1820. PI. 1 to 2 feet. 



43 A. LASIO'LOBA (Link. enum. hort. berl. 2. p. 163.) stem 

 leaves and pods downy with stellate hairs ; radical leaves lyrate, 

 upper ones entire. $ . H. Native of Mexico. Racemes short. 

 Calyx spreading. Style nearly a line long. 



W. oolly-podded Wall-Cress. Fl. Ju. Jul. Clt. 1826. PL 1| foot. 



SECT. II. LOMO'SPORA (from Xwjua, loma, a fringe, and a-tropa, 

 spora, a seed ; seeds girded by a membranous wing.) D. C. syst. 



2. p. 234. prod. 1. p. 146. Seeds marginate, or girded by a broad 

 membranous wing. 



1. Oblongipetala. 

 oblong-linear. 



Cauline leaves clasping the stem. Petals 



