24 THE FLORA OF THE ALPS 



Tribe Alyssine^. — Seed-vessel short (silicule), not 

 compressed or jointed ; seeds in two rows ; radicle 

 accumbent ; flowers white or yellow. Genera 18-25. 



18. Alyssum, L. 



Stem leafy; leaves entire; flowers small, white or 

 yellow ; sepals equal, entire or bifid ; filaments toothed 

 or winged ; seed-vessel cylindrical, few-seeded. 



A. alpestre, L. ; with small pale yellow petals, scarcely 

 longer than the sepals, and woody stem; Nicolaithal, 

 Pyrenees, Dauphiny, rare. A, Wulfenianum^ Bernh. ; 

 with golden - yellow flowers and sharp teeth on the 

 filaments ; Switzerland, Tirol, Styria, Carinthia, rare. 

 A, Rochelii, Andrz. ; with golden-yellow flowers and blunt 

 filament-teeth; Carinthia, also in rocky places in the 

 Pyrenees. A. montanum^ L., a shrubby plant with 

 larger yellow flowers; and A. perusianum^ Gay, A. 

 spznosuntj L., and A. pyrenaicum, L., with white flowers, 

 the last two spiny ; Pyrenees. A . calycinum^ L., flowers 

 yellow, is a weed in cultivated land. A. incanumy L. 

 {Berteroa incana, DC.); flowers white, plant grey with 

 stellate hairs ; road-sides ; Southern Switzerland, rare. 



19. COCHLEARIA, L. 



Sepals short, equal, spreading; flowers small, white; 

 seed-vessel globose, many-seeded ; filaments not toothed. 



Three species of Scurvy Grass are alpine, viz. : C. 

 saxatilis, Lam. {Kernera saxatiliSy Rchb.); stem 6-8 

 in. high, diffusely branched, radical leaves obovate, 

 dentate, or lyrate, common ; C, alpiiia^ Tausch. ; stem 



