TURRIT1S. ARABIS. 23 



5. TURRITIS Linn. Tower- wort. 



1. T. glabra (L.); radical 1. toothed hairy, stem-1. glabrous 

 entire amplexicaul with a sagittate base, pods straight erect. 

 E. B. 777- R. ii. 44. Plant very erect and straight, 13 ft. high. 

 Fl. whitish-yellow. Banks, particularly in Norf. and Suff. Cliffs 

 in Glen Devon, Scotland. B. VI. VII. E. S. 



6. ARABIS Linn. Rock-cress. 



1. A. hirsuta (R. Br.); 1. hispid dentate, stem-L truncate-aw- 

 ricled or cordate at the base, auricles patent, pods erect narrow 

 straight. E. B. 587. St. 1 foot high, clothed with spreading 

 mostly simple hairs and many erect leaves. Sometimes the 

 hairs on the stem are adpressed and branched. Root-1. narrowed 

 into a footstalk. Koch and Reich, divide this into two or more 

 species which I have not been able to determine. Walls and 

 banks. B. VI. VIII. 



2. A. ciliata (R. Br.) ; 1. glabrous and ciliated or hispid some- 

 what toothed nearly sessile, stem-L sessile with a rounded base, 

 pods erect narrow straight. St. erect. Seeds without wings. 

 a. st. glabrous, 1. glabrous ciliated. E. B. 1746. )3. st. and 1. 

 hispid. Often taken for A. hirsuta. Rocks by the sea, Cunna- 

 mara, Ireland. /3. Lidstep, Pembrokeshire. B. "VII. VIII. E. I. 



3. A. stricta (Huds.); I. hispid and ciliated deeply sinuate- 

 dentate narrowed into a footstalk, stem-L sessile, pods few di- 

 stant erect-patent straight. E. B. 614. St. erect, glabrous, 

 hispid below, 6 8 in. high. Fl. rather large. " Seeds with a 

 narrow margin and winged at the apex." Limestone cliffs near 

 Bristol. P. IV. V. E. 



4. A.petrcea (Lam.) ; L glabrous or with forked hairs lyrate- 

 pinnatifid or oblong-ovate nearly entire with long stalks, stem-L 

 narrow nearly entire stalked, pods spreading slender straight. 

 E. B. 469. St. erect or decumbent, 3 8 in. long, glabrous. Fl. 

 large, white tinged with purple. Seeds oblong with a narrow 

 margin and slight wing at the end. Alpine rocks in E. and S. 

 Ben Bulben, Ireland. Mr. Wynne. P. VII. VIII. 



*5. A. Turrita (L.) ; 1. clothed with short forked hairs dentate 

 elliptical narrowed into a stalk, stem-L deeply cordate-amplexi- 

 caul elongate, pods flat with a thickened margin recurved from 

 an erect stalk, seeds with a membranous margin. E. B. 178. R. 

 ii. 44. St. 1 foot high, erect, hairy. Fl. yellowish. Pods 34 

 in. long, without any central vein but with many prominent 

 longitudinal anastomosing veins. On walls at Oxford, Cam- 

 bridge, and Cleish Castle, Kinross. B. V. E. S. 



