184 TETRADYNAMIA SILICULOSA. TeesdaHa, 



Whole plant more or less hoary. Stem erect, about one ^.^ 

 branched above, leafy. Ls. lower spear-inversely-egg-shaped, 

 stem-Is. clasping the stem. FL small, white, in small corymbs, 

 soon lengthening into very long spikes. Pet. battledore-shaped, 

 scarcely longer than the cal. Pouch roundish, protuberant. 



Var. with smooth Is. 



(L. ruderdle. Narrow-leaved P. E. B. 159<5. Thlaspi 

 minus. G. E. 262. Almost every where about 

 Bristol, Gloucestershire. Tur.^ See Appendix. 



(^Hutchinsia petrcEa. Rock H. H. L. 31. Lep. petrseum. 

 E. B. 111. St. Vincent's Rocks, Gloucestershire. 

 Mr. Sandys, Pembroke Coll. Oxford.) 



(TEESDA'LIA.' Teesdalia. 



T. nudicauUs. Naked -stalked, or Irregular T. Petals 

 unequal. Iberis nudicauhs. E. B. 327- C 6. 42. 

 Bursa pastoria minima. G. E. 276. 



Dry^ harren, gravelly fields.* * Pond bank, near Tubney, Berks. Y. 

 Coleshill Heath, Warwickshire. Purt. FL 



An. May. 



Ls. lyre-shaped. Fl. minute, white.) 



THLASPI.* Shepherd's Purse. Mithridate Mustard. 



T. arvense. Mithridate Mustard, or Penny Cress. 

 Pouch flat and round, shorter than its stalk. Leaves 

 smooth, oblong, toothed. Stem erect. E. B. 1659- 

 C. 6. 43. T. Dioscoridis. G. E. 262. 



Cultivated, or waste ground. Near Stow Wood. Stanton Harcourt. 



Southleigh. Sh. Broughton-Pogges. Dr. Goodenough. Field 



near Cowley Gate, &c. 

 An. June. 

 Plant smooth. Stem erect, about one f., leafy, branched in the 



upper part. Ls. alternate, arrow-shaped, and clasping the stem 



at their base. Fl. many, extremely small, white. Pouch very 



large, erect, borders very broad, figure almost circular: the 



short style in a notch on the top. 



The seeds, an ingredient formei'ly in the Mithridate confection. 

 Taste pungent : flavour of plant like garlick : gives a taste to the 

 milk of cows which feed on it. Seeds abound with oil, formerly 

 in use for rheumatism. 



1 After Mr. Robert Teesdale, F.L.S. ob. 1804. 



2 From Gr. tlilao, to break, because the fruit is in form rugged, and, as it 

 were, broken. 



