CL. XV.] TETEADYNAMIA SILICULOSA. 267 



6. LEPI'DIUM. PEPPER-WORT. 



Calyx of four egg-shaped, concave, deciduous leaves. Petals 

 inversely egg-shaped, undivided, with narrow claws. Filaments 

 awl-shaped, as long as the calyx ; anthers two-lobed. Germen 

 roundish. Style slender ; stigma obtuse. Pouch round or 

 oblong, compressed, notched at the top, two-celled ; the valves 

 keel-shaped ; partition very narrow, crossing the greater dia- 

 meter of the pouch. Seeds one in each cell, egg-shaped. 

 Named from lepis, a scale. 319. 



1. L. latifolium. Broad-leaved Pepper-wort. Leaves between 



lance-shaped and egg-shaped, undivided, serrate. Stems three 



feet high, branched : flowers numerous, very small, white, in com- 

 pound leafy panicled clusters. Perennial : flowers in July: grows 

 in marshes and meadows near the sea : rare. Eng. Bot. vol. iii. pi . 

 182. Eng.Fl. vol. iii. p. 165. 938. 



2. L. Drdba. Whitlow Pepper-wort. Leaves lance-shaped, clasp- 

 ing the stem. About a foot high, with large, distant leaves, and 



corymbs of numerous white flowers : pouch heart- shaped, with the 

 style about its own length. Perennial : flowers in June : grows in 

 fields and hedges in several places in the south of England, where 

 it has been naturalized. Eng. Bot. Suppl. pi. 2683. Brit. Fl. 4th ed. 

 p. 247. 939. 



3. L.ruderdle. Narrow-leaved Pepper-wort. Lower leaves pinna- 



tifid, toothed ; upper linear, entire ; stamens two ; petals none. 



The whole plant smooth, glaucous : stem about ten inches high : 

 flowers sometimes have the petals. Annual : flowers in June : 

 grows in waste ground : frequent. Eng. Bot. vol. xxiii. pi. 1595. 

 Eng. Fl. vol. iii. p. 166. 940. 



4. L. campestre. Mithridate Pepper-wort. Pouch covered with 

 minute scales, notched, bordered at the top ; style very short ; stem- 

 leaves arrow-shaped, toothed. More or less downy and glaucous : 



lowest leaves inversely egg-shaped: flowers numerous, small, 

 white, corymbose. Annual : flowers in July : grows in cultivated 

 fields : frequent. Eng. Bot. vol. xx. pi. 1385 : Tlilaspi campestre. 

 Eng. Fl. vol. iii. p. 166. 941. 



5. L. Smithii. Hairy Mithridate Mustard. Pouch egg-shaped, 

 notched, not scaly, bordered at the top ; style prominent ; stem- 

 leaves arrow-shaped, toothed. Stems hairy, from six to eight 



inches high : flowers white. Perennial : flowers in June : grows 

 on the edges of fields. Eng.Bot.vol. xxvi.pl. 1803: Lepidium hirtum . 

 Eng. Fl. vol. iii. p. 167. 942. 



7. THLA'SPI. SHEPHERD'S-PTJRSE. 



Calyx of four egg-shaped, concave, spreading, equal leaves. 

 Petals egg-shaped, equal, undivided, with short claws. Fila- 

 ments slender j anthers heart-shaped, acute. Germen roundish, 

 notched or inversely heart-shaped. Style short ; stigma obtuse. 

 Pouch compressed, roundish or inversely heart-shaped, two- 

 celled ; valves keeled, generally bordered ; partition elliptical, 

 crossing the greater diameter of the pouch. Seeds egg-shaped, 

 several in each cell. Named from Mao, to flatten. 320. 



1 . T. arve'nse. Mithridate Mustard. Penny-cress. Pouch round, 

 nearly flat, shorter than its stalk ; leaves smooth, oblong, toothed. 



