CAPSELLA. ISATIS. 33 



28. Capsella Vent. Shepherd's Purse. 



1. C. Bursa-pastoris (DC.) ; radical 1. lanceolate pinnatifid or 

 undivided toothed, upper 1. amplexicaul auricled, pouch trian- 

 gular-obcordate. — TUaspi Sm., E. B. 1485. — Varying greatly in 

 size and the division of its leaves. Known by its peculiar 

 pouches. — A common weed. A. III. — X. 



Tribe IX. Subulariea. 



29. SuBULARiA Linn. Avfl-wort. 



1. S. aquatica (L.); E. B. 732. R. ii. 12.— Cotyledons only 

 once folded, but curved back upon themselves above their base, 

 therefore incumbent not bicrures. Plant small, subaqueous. 

 L. linear-subulate, radical. Root of many long white fibres. 

 Fl. small, often perfected under water. — Margins of alpine lakes. 

 P. VII. 



Tribe X. Senebierece. 



30. Senebikra Pers. Wart-cress. 



1. S. Coronopus (Poiret); pouch undivided reniform crested 

 with little sharp points, style prominent, 1. pinnatifid. — E. B. 

 1660. R. ii. 9. — St. much branched, prostrate. Fl. small, white, 

 in lateral clusters opposite to the leaves. Pouches large, in 

 dense clusters. Cotyledons in this genus curved back upon 

 themselves above their base, not at it as is usual in Crucifera. — 

 "Waste ground, common. A. VI. — IX. 



2. S. didyma (Vers.) ; pouch notched of two wrinkled lobes, 

 style very short, 1. pinnatifid. — E. B. 248. R. ii. 9. — St. spread- 

 ing, prostrate, a foot or more in length. Fl. small white in long 

 slender lax clusters. — Waste ground near the sea in the south 

 and south-west. A. VII.— IX. E. I. 



Suborder IV. Nucumentacea. Tribe XI. Isatidece. 



31. IsATis i««». Dyer's Woad. 



fl. /. tinctoria (L.) ; "radical leaves oblong crenate," pouch 

 abnipt smooth thrice as long as broad. — E. B. 97- R. ii. 4. — 

 Cultivated and waste land, rare. B. VII. 



Suborder V. Lomentacea. Tribe XII. Cakilinea. 



The fruit consists of a vei-y small 2-celled, stalkhke, usually 

 sterile pod, with a long moniliform beak bearing the seeds and 

 dividing transversely into as many indehiscent cells as there are 

 seeds. 



c5 



