TURRITIS. ARABIS. 23 



5. TuRRiTis Linn. Tower- wort. 



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

 entire amplexicaul with a sagittate base, pods straight erect. — 

 E. B. 777. R. ii. 44.— Plant very erect and straight, 1—3 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-aa- 

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

 straight. — E. B. 687. — 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 cihated. E. B. 1746. — /3. st. and 1. 

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

 mara, Ireland. j3. Lidstep, Pembrokeshire. B. VII. VIII. E. I. 



3. A. strict a (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.petrtea (Lam.) ; I. glabrous or with forked hairs lyrate-» 

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

 narrow nearly entire stalked, pods spreading sleuder straight. — 

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

 large, white tinged with purple. Seeds oblong vpith 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 3—4 

 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. 



