PL ex. thai. 80. CRUCIFERiE. 456. Vella. 691 



Vella annua. Yearling cresset. 



Leaves pinnatifid ; siliqucB pendulous. 



Nasturtium sylvestre erucae affinis, Raii Syn. 304, 3. 

 Eruca nasturtio cognata tenuifolia, Ger. em. 247, 4, 

 Velbi annua, Lin. S. P. 895. 

 Valencia cress. Cress rocket. 



Sandy coi'n-fields ; annual; June. 



Sf.eni branched, hispid, bristles turned back ; leaves 

 doubly pinnatifid ; powers spiked ; spikes terminal, many- 

 flowered; sepales purple; petals bright yellow veined with 

 violet. 



XX. 437. THLASPI. Dioscorides. Treacle-mustard. 



SiliciilcB compressed, nicked ; valves 2, boatshape, often 

 winged, many-seeded ; filaments toothless, distinct, inserted 

 in the mouth of the calyx ; sepales equal, spreading. 



a. Sllicula winged. 



1. Thlaspi arvense. Corn-field treacle-mustard. 

 SiliculcB orbiculate ; wing dilated, longitudinal ; seeds 



concentrically streaked ; leaves oblong, arrowshape, toothed, 

 bald. 



Thlaspi Dioscoridis, Raii Syn. 305,3; Ger. em. 262, 1. 



Thlaspi drabae folio, Park. 836. 



Thlaspi arvense, Lin. S. P. 901. 



Penny cress. Treacle mustard. Smooth mithridate mustard. 



Fields ; annual ; June and July. 



Herb bald; stem upright, branched above; pe/0/5 small, 

 not nicked, white ; siliculce very large. — Seeds acrid ; herb 

 has a garlic flavour, communicates a bad taste to the milk 

 of cows that feed upon it. 



2. Thlaspi alpestre. Alp treacle-mustard. 

 Silicidce reverse ovate, retuse ; cells 4 to 6-seeded ; style 



standing out; stame?is as long as the petals; si em- leaves 

 heartshape, arrowshape; stem simple. 



Thlaspi foliis globularias, Raii Syn. 305,4. 

 Thlaspi mnnlanum glasti folio minus, Park. 842. 



Thlaspi album supinum siliquis planis, ilore spicato, Gf^er. em. 268, 6^ 

 right hand figure. 



Thlaspi alpestre, im. S. P. 903. 



Thlaspi mnntanum, Hudson Ft. Angl. 282. 



White treacle mustard. 



Mountainous pastures ; perennial ; June and July. 



Stems many, nearly upright, simple ; leaves bald, glau- 

 cous; root-leaves in a tuft, ovate; stem-leaves arrowshape; 

 corymhus close, small, becoming a very long raceme ; petals 

 white. 



2 Y 2 



