r^ 





32 



VI. CRUCIFER^ : THLASPIDE^. 



imdspi 



r' 



Tribe III. Thlaspide^. Pouch compressed, ivith the disseni 

 ment very narrow in the narrowest diameter, valves keeled nl 

 —'~^ ^"^ - =. (Gen. 13—16.) 



winged. Cot. o 



13. Thjlaspi Linn. Penny- Cress. 



Pouch laterally compressed, emarginate; valves winfred at tliP 

 back ; cells 2— 8-seeded. — Named from ^\auj, to fiatten ■ Z 

 account probably of its compressed seed-vessels. ' 



1. T. aroense L. (Field P. or Mithridate Mustard) : pouch 

 orbicular with a broad longitudinal wing, with a marginal 

 nerve, cells about 6-seeded, seeds concentrically striate, le'kve, 

 arrow-shaped toothed glabrous. jE:.^. t. 1659 



0. 



Fields and by road-sides, in various places ; but not common 

 ^—^■ — One foot high, branched above. Flowers extremely smS" 

 white. Pouch very large, with unusually broad wings. ' 



perfolidtum L. (perfoliate P.) 



tirely with a broad wmg above, wing with a marginal nerve 

 cells 4-6-seeded, seeds smooth, style included within the notch' 

 cauiine leaves cordate somewhat toothed glabrous. PJ.B.i 



Limestone pastures ; rare. Burford, Oxfordshire ; Bourton Up- 

 per Slaughter, and Naunton- Seven- Springs, near Stow-on-the-Woid 

 Gloucestershire. Stone walls about Kineton, Warwickshire G) 

 4, 5. — Raceme elongated when in fruit. * 



3. T.alpestre L. (alpine P.); pouch somewhat obovate re- 

 tuse winged above, nerve of the wing obsolete, cells 2— 4-seeded 

 style as long as the notch or exserted, stamens as lono- as the 

 petals, caulme leaves cordato-sagittate, stem simple £! B t 

 81. « racemes of fruit elongated, style scarcely longer than 

 the notch of the oblong-obovate pouch.- ^8. racemes of fruit 

 oblong, style much longer than the notch of the trian<mlar ob- 

 cordate pouch. T. occitanum Jord.~y. racemes of fruit oval 

 or oblong, style much longer than the shallow notch of the 

 oboval pouch. T. virens Jord. 



Mountain pastures rare. «. Teesdale; Thornhaugh, Northumber- 

 land. Glen Isla. Clova.— ^. Settle, Yorksh. ; Llanrwst, Caernar- 

 ,,,..-. ' ---byshire. %. 6—8. Upon the above 



slender distmctions has this species been split into three, T. occitanum 

 being intermediate between the extreme forms. 



14. HuTCHiNSiA Br. (not oi Agardh.) Hutchinsia. 



Pouch elliptical, entire; the valves keeled, without wins^s; 

 cells 2-seeded. Filaments simple. — K"amed in honour of the 



^.,.„. v^i,j,ci. — ^. ot-ine, jorKsn.; 



vonshire._ 7. Matlock, Derbyshire. %. 6—8. 



