190 



CRUCIFERjE. XXXV. COCHLEARIA. XXXVI. THLASPI. 



Unalaschka, on the highest rocks. Flowers when dry yel- 

 lowish. 



Long-podded Scurvy-Grass. PI. foot. 



24 C. ? VELUTINA (D. C. syst. 2. p. 370.) pods elliptical, one 

 half shorter than the pedicels ; leaves velvety with branched 

 down, radical ones pinnate-parted, cauline ones sagittate. O- H. 

 Native of Syria, between Aleppo and Mossul. Flowers like 

 those of C. saxatilis. Petals broad, obovate. Deless. icon. sel. 

 2. t. 49. A very distinct species which, perhaps with the fol- 

 lowing, may constitute a separate genus. 



Velvety Scurvy-Grass. PI. 1 to 3 inches. 



25 C. SAXIFRAG^FOLIA (D. C. syst. 2. p. 370.) pods ovate- 

 oblong ; leaves smooth, radical ones stalked, kidney-shaped, 

 palm'ately and deeply-toothed, cauline ones ovate, 3-lobed, up- 

 permost ones linear. I/ . H. Native of Persia. Flowers very 

 like those of the preceding plant, Deless. icon. sel. 2. t. 50. 



Saxifrage-leaved Scurvy-Grass. PI. A to $ foot. 



SECT. IV. IONOPSI'DIUM (from tov, ion, a violet, o^ig, opsis, 

 resemblance, ciSoc, eidos, similar ; like a violet.) D. C. syst. 2. 

 p. 371. prod. 1. p. 174. Silicle roundish, compressed, emar- 

 ginate at the top. Flowers lilac. An intermediate section be- 

 tween Cochlearia and Thlaspi. 



26 C. ACAU'LIS (Desf. fl. atl. 2. p. 69.) pods roundish, emar- 

 ginate, pedicels rising from the root ; petioles long ; leaves ovate- 

 roundish, entire. Tf.. H. Native of Portugal, frequent on the 

 basaltic hills near Lisbon, but rarer in the calcareous hills of 

 Estremadura. Said also to grow in Morocco. C. pusilla, Brot. 

 phyt. p. 100. no. 45. t. 21. f. 2 and 3. Jacq. eclog. t. 132. 

 C. Olyssiponensis, Brot. fl. lusit. 1. p. 571. Lepidium violi- 

 forme, D. C. mem. soc. hist. nat. paris. an. VII. p. 145. Leaves 

 and pedicels rising from the root. Pedicels 1 -flowered, and 14 

 inch long. 



Stemless Scurvy-Grass. Fl. March, May. Clt. 1823. PI. 1 Jin. 



f Species not sufficiently known. 



27 C. SAGITT.SSF&LIA (Desv. journ. bot. 3. p. 182.) O- H. 

 Native of ? Flowers small white ; pods oblong, en- 

 tire, tumid, few-seeded ; radical leaves oblong, slightly toothed. 



Arrow-leaved Scurvy-Grass PI. \ foot. 



28 C. LYRA'TA (Sibth. and Smith, fl. graec. t. 619.) Q. H. 

 Native of Sicily. Leaves toothed, smooth ; radical ones lyrate, 

 caviline ones oblong, sagittate, stem-clasping. 



Zyre-leaved Scurvy-Grass. PI. ^ foot. 



29 C. REPA'NDA (Med in Ust. new. ann. 2. p. 42.) Native ? 

 Lower leaves stalked, waved, pubescent, superior ones repand, 

 stem-clasping, sagittate, hollowed in the form of a spoon. 



Repand-\eaved Scurvy- Grass. 



30 C. LONGIFOLIA (Med. in Ust. new. ann. 2. p. 41.) Na- 

 tive of ? Lower leaves on long foot-stalks, upper ones sessile, 

 for the most part entire. 



Long-leaved Scurvy-Grass. PI. ? 



Cult. The common horse-radish should be planted in Febru- 

 ary or October in the way recommended under that species, in a 

 deep rich soil. The smaller perennial sorts do best in pots, 

 placed among other alpine plants, but the larger ones should be 

 planted in a shady, rather moist situation, in the open border. 

 The biennial and annual kinds only require to be sown in the 

 open border, the greater part of them grow best in a damp 

 situation, the seeds should be sown directly after they have ri- 

 pened, or they may be allowed to sow themselves. They are 

 all easily increased by seeds except Cochlearia armoracia and 

 macrocdrpa, which do best by slips from the root, and some 

 others of the perennial species which do not seed freely may be 

 increased by dividing the plants at the root. 



Tribe III. 



THLASPFDE.ZE (plants agreeing in some important charac- 

 ter with Thlaspi.) or PLEURORHI'Z.E (from TrXewpa, pleura, 

 a side, and pifa, rhiza, a root ; radicle at side of cotyledons ; 

 (f. 46. c. f. 45. g. d.} ANGUSTISEPT/E (from angustus, narrow, 

 and septum, a dissepiment.) D. C. syst. 2. p. 372. prod. 1. p. 175. 

 Silicle opening, with a very narrow dissepiment (f. 46. k. /.), 

 and keeled navicular valves (f. 46. k. I. m. and ra.). Seeds oval (f. 

 46. 1.) sometimes margined (f. 46. n.~). Cotyledons flat, accumbent, 

 contrary to the dissepiment (f. 46. k. f. 45. a. d.). A very dis- 

 tinct tribe, and can only be confounded with Lepidinece, but 

 from which it is easily distinguished by the much compressed 

 seeds and accumbent cotyledons. 



* Cells of silicles from 2 to many-seeded. 



XXXVI. THLA'SPI (from 0Xaui, thlao, to compress ; seeds 

 compressed.) Dill. fl. giss. gen. nov. p. 123. t. 6. Vent. tab!. 

 3. p. 110. Thlaspi spec. Lin. Juss. Lam. 



LIN. SYST. Tetradynamia, Siliculosa. Silicle emarginate at 

 the apex, (f. 46. k. Z.) with navicular valves which are winged 

 at the back (f. 46. L). Cells 2 or many-seeded (f. 46. I.) 

 Petals equal. Calyx equal at the base. Perennial or annual 

 branched, erect, smooth herbs with entire or toothed leaves, 

 radical ones usually stalked, cauline ones stem-clasping. Racemes 

 terminal ; pedicels bractless. Flowers of all white. 



SECT. I. PACHYPHRA'GMA (from na^ye, pachys, thick, ^pay^a, 

 phragma, a dissepiment.) D. C. syst. 2. p. 373. prod. 1. p. 175. 

 Silicle broad, emarginate. Style none. Dissepiment thick, 

 double, furnished with 3 longitudinal plaits. Seeds 4, not stri- 

 ated (f. 46. k.). 



1 T. LATIFOLIUM (Bieb. fl. taur. 2. p. 99. supp. p. 430.) 

 radical leaves on long footstalks, cordate, repand-toothed, cauline 

 ones ovate-cordate, on short foot-stalks. 2. H. Native of 

 Iberia, in woods, also in the north of Caucasus. T. macrophy'l- 

 lum, Hoffm. comm. soc. phys. med. mosc. 1. p. 7. Lepia lati- 

 folia, Desv. journ. bot. 3. p. 166. Pterolobium Biebersteinii, 

 Andrz. cruc. ined. Flowers largish. Petals cuneated, blunt, 3- 

 times longer than the calyx. Deless. icon. sel. 2. p. 51 . (f. 46. k.}. 



Broad-leaved Bastard-Cress. Fl. March, April. Clt. 1822. 

 PI. to 1 foot. 



SECT. II. CARPOCERAS (from icapiroc, karpos, a fruit, and 

 KEpaj, keras, a horn ; valves horned.) D. C. syst. 2. p. 374. 

 prod. 1. p. 175. Valves expanded at end into a wing resem- 

 bling a horn. Seeds 4, striated. Dissepiment membranous, 

 oblong. 



2 T. CERATOCA'RPON (Murr. comm. goett. 1774. p. 26. t. 1.) 

 radical leaves somewhat stalked, obovate-oblong, cauline ones 

 hastate, stem-clasping, with acute auricles. O- H. Native of 

 Siberia, in salt fields, in plenty between the Belokamenskoi sta- 

 tion and Fort Seven-Palace. Capsella cornigera, Medik. in Ust. 

 new. ann. 2. p. 46. Th. cornutum, Clairv. herb. val. 214. 

 Lepidium ceratocarpon, Pall. Flowers small white. Fructife- 

 rous pedicels, filiform. 



Horned-podded Bastard-Cress. Fl. May, July. Clt. 1771). 

 PL 1 to li foot. 



SECT. III. NOMISMA (from vop.iaf.ia., nomisma, a piece of 

 money ; in allusion to the form of the silicles as well as the names 

 of Th. arvensis, money-wort, monnoyere, Fr.) D. C. syst. 2. p. 

 375. prod. 1. p. 175. Valves with a wing along the whole back. 

 Seeds numerous, striated. 



