CRUCIFER/E. XXXVI. THLASPI. 



191 



3 T. ARVE'NSE (Lin. spec. 901.) leaves oblong, toothed, 

 stems erect ; pods obovately-orbicular, shorter than the pedicels. 

 Q. H. Native throughout Euro e, in cultivated or waste fields, 

 and probably has been introduced to many countries with wheat. 

 In England, but not common, particularly in Essex, Suffolk, and 

 Staffordshire. Fl. dan. t. 793. Curt. fl. lond. 6. t. 43. Smith, 

 eng. bot. t. 1659. Schkuhr. hanb. 2. no. 1789. t. 180. Boiss. 

 fl. europ. t. 440. f. 2. Stok. bot. mat. med. 3. p. 438. Flowers 

 small, white. Odour of plant when bruised somewhat allia- 

 ceous. 



Corn-field Penny-Cress. Fl. May, July. England. PI. i to 

 1 foot. 



4 T. BAICALE'NSE (D. C. syst. 2. p. 376.) leaves oblong, 

 grossly toothed ; stems erect ; pods orbicular, longer than the 

 pedicels. O- H. Native of Siberia, beyond the Baical, and on 

 the shores of the Baical lake. This is perhaps only a variety of 

 Th. arvense. 



Baical Bastard Penny-Cress. Fl. May, Jul. PI. % to foot. 



5 T. COLLI'NUM (Bieb. fl. taur. 2. p. 99.) leaves oblong, 

 toothed, cauline ones linear-sagittate, upright; stems diffuse, 

 somewhat ascendant; pods almost orbicular, . H. Native of 

 Armenia and Iberia on Mount Alwar, about the metal mines. 

 Th. nemorosum, Adami, Hoffm. cat. hort. mosc. 1808. no. 3249. 

 Very near Th. arvense. 



Hill Penny-Cress. Fl. May, July. Clt. 1818. PI. | tof foot. 



SECT. IV. NEURO'TROPIS (from vevpov, neuron, a nerve, and 

 rpoTric, tropis, a keel ; wings of pod circumscribed by a nerve.) 

 D. C. syst. 2. p. 377. prod. 1. p. 176. Silicle orbicular, emar- 

 ginate, with a narrow recess. Back of valves expanded into a 

 broad wing, which is circumscribed by a nerve. Seeds numer- 

 ous, not striated. 



6 T. ORBICULA'TUM (Stev. in litt. and D.C. syst. 2. p. 377.) 

 superior leaves quite entire, stem-clasping ; pods orbicular. 

 . H. Native of Iberia. Seeds oblong, compressed, rufous. 



Or&icutar-podded Bastard-Cress. Fl. May, July. Clt. 1820. 

 PI. | to 4 foot. 



7 T. UMBELLA'TUM (Stev. in D. C. syst. 2. p. 377.) leaves 

 ovate, toothed ; radical ones somewhat stalked, cauline ones half 

 stem-clasping; pods obcordate. 0. H. Native of Persia, in 

 the province of Ghilan. 



Umbellate-fioviered. Bastard-Cress. PI. -J foot. 



8 T. PROCU'MBENS (Lapeyr. abr. 366.) leaves sinuately pin- 

 natifid, or almost entire ; .petals hardly larger than the calyx ; 

 pods 10-12-seeded, blunt at both extremities; stigma sessile. 

 Q. H. Native among rubbish on the sea-side, as well as on the 

 sides of roads, or paths about salt pans or pits, or any place 

 where salt is made in Spain, South of France, Piedmont, Tauria, 

 Island of Cyprus, &c. Lepidium procumbens, Lin. spec. 898. 

 Hil. veg. syst. 11. t. 42. f. 1. Lepidium pusillum, var. o, Lam. 

 fl. fr. 2. p. 468. Hutchinsia procumbens, Desv. journ. bot. 3. 

 p. 168. Stem procumbent. This is evidently a true Lepidium. 



Far. /3, erectiuscula (D.C. syst. 2. p. 391.) steins erectish. 

 Native of Syria. 



Var. y, integrifblia (D. C. 1. c.) leaves entire, or sparingly 

 cut. Native of Slarseilles. 



Procumbent-stemmed Bastard-Cress. Fl. March, May.' Clt. 

 1819. PI. procumbent 



SECT. V. PTERO'TROPIS (from irrepov, pteron, a wing, and 

 rpoiric, tropis, a keel ; valves of pods furnished with winged 

 keels.) D. C. syst. 2. p. 377. prod. 1. p. 176. Silicle somewhat 

 obovate, emarginate or truncate. Valves furnished with a wing 

 the whole length on the back (f. 46. /.), but the wings are not mar- 

 gined with a nerve as in the preceding section. Seeds not striated. 



9 T. ALLIA'CEUM (Lin. spec. 901.) leaves oblong, blunt, 



somewhat toothed, lower ones stalked, upper ones sagittate, stem- 

 clasping, with acute auricles ; pods obovate, ventricose ; stigma 

 almost sessile. 0. H. Native throughout middle and south 

 Europe, in cultivated fields. Jacq. icon. rar. 1. 1. 121. Flowers 

 a little smaller than those of Th. arvense, and the pods are almost 

 one half smaller. Th. arvense, (3 minor, Lam. fl. fr. 2. p. 464. 

 Plant when bruised smelling of garlic. 



Gar/z'c-scented Bastard-Cress. Fl. June, July. Clt. 1714. 

 PI. | to foot. 



10 T. PERFOLIA^TUM (Lin. spec. 902.) leaves somewhat tooth- 

 ed, radical ones stalked ; cauline ones cordate, stem-clasping ; 

 stem branched ; petals equal in length with the calyx ; pods ob- 

 cordate, 8 -seeded ; stigma almost sessile. Q. H. Native of 

 Portugal, Spain, France, Switzerland, Germany, Italy, Podolia, 

 Greece, &c. in cultivated fields, especially on a chalky soil ; 

 in England, abundant among stone-pits, about Burford, Ox- 

 fordshire, but it is not known to be found any where else in Bri- 

 tain. Jacq. aust. t. 337. Smith, eng. bot. t. 2354. Th. alpestre, 

 Huds. angl, 282. 



Var. /3, simplicissimum (D. C. syst. 2. p. 379.) stems simple, 

 strict, striated from the base. Q. H. Native of the north of 

 Persia, about Lenckeran. 



Perfoliate-leaved Bastard-Cress. Fl. April, July. England. 

 PI. | foot. 



11 T. MONTA'NUM (Lin. spec. 902.) leaves somewhat fleshy, 

 entire, radical ones obovate, stalked ; cauline ones oblong, sagit- 

 tate, stem-clasping ; petals larger than the calyx ; pods obcor- 

 date, 4-seeded ; style filiform. 1. H. Native of Europe from 

 Spain to Podolia, and from Sicily to Holland, on mountains. 

 Jacq. aust. t. 237. Bois. fl. eur. t. 441. f. 1. Schkuhr. handb. 

 2. no. 1794. t. 180. Lepidium thlaspidioides, Pall. itin. 3. 

 p. 161. Th. spatulatum, Gater. fl. montanb. 115. 



Far. (3,pra;*cox (Wulf. in Jacq. coll. 2. p. 124. t. 9.) differing 

 from the species by the plant being a little more glaucous, and 

 with the radical leaves crenated at the top. Draba carnica, 

 Scop. 



Var. /, alplnum (Jacq. aust. 3. t. 238.) style longer, exceed- 

 ing the ovary, and almost equalling the length of the pod. 



Mountain Bastard-Cress. Fl. May, July. Clt. 1808. PI. 

 f to foot. 



12 T. ALPE'STRE (Lin. spec. 903.) leaves entire, radical 

 ones ovate, stalked, cauline ones sagittate, stem-clasping ; petals 

 nearly as long as the calyx; pods obcordate, 8 to 12-seeded ; 

 style filiform. I/ . H. Native of the Pyrenees, Cevennes, Car- 

 pathian mountains, France, Spain, &c. in mountain pastures 

 and meadows ; in the north of England, among lime-stone rocks 

 and lead mines ; about Settle and Malham, Yorkshire. At Mat- 

 lock Bath, Derbyshire. Smith, eng. bot. t. 81. Th. caerules- 

 cens, Presl. fl. cech. p. ? Th. montanum, Huds. angl. 282. Th. 

 prae v cox, Schleich. pi. helv. 



Alpine Bastard-Cress. Fl. Ju. Jul. England. PI. i foot. 



13 T. HETEROPHY'LLUM (D.C. fl. fr. ed. 3. vol. 4. p. 712.) 

 radical leaves stalked, spreading, entire, toothed, or lyrate, cau- 

 line ones erect, cordately-sagittate ; petals almost equal with the 

 calyx. 1 . H. Native of the Pyrenees, on the borders of 

 Spain. Flowers a little smaller than those of Th. alpestre. 



Variable-leaved Bastard-Cress. Fl. June, July. PI. ^ foot. 



14 T. MAGELLA'NICUM (Pers. ench. 2. p. 189.) radical leaves 

 oval, stalked, almost entire, cauline ones oblong-sessile ; petals 

 nearly equal with the calyx ; pods oblong, truncately-emarginate, 

 8-seeded ; style short. If. . ? H. Native of the rocks of Magel- 

 lan at the places called by French travellers Baie Duclos, and 

 Baie Boucaut. Flowers small, white. Seeds oval-oblong, rufous, 

 compressed, not striated. 



Magellan Bastard-Cress. PI. ^ foot. 



15 T. COCHLEARIFO'RME (D. C. syst. 2. p. 381.) leaves 



