250 TETR ADYNAMIA — SILICULOSA. ICuinelina. 



Frequent on walls, rocks and dry banks. — /3. abundant on shelving 

 rocks on Ben Lawers, above the lake. Fl. March — May. 0. — The 

 var. /3. is a very singular one, which I have watched for many successive 

 years in the above station, and never found it to vary, but always to 

 have the pouch as much inflated as that oi Subularia. Nor is it altered 

 by cultivation from seed in a garden. 



2. D. aizoides, L. (yelloiv alpine Whitlow-grass); scapes leafless 

 glabrous, petals slightly notched twice the length of the calyx, 

 pouch with a long style, leaves lanceolate rigid glossy keeled 

 and ciliated. E. Bot. t ]27 1. 



Walls and rocks near Swansea, S. Wales. Fl. March, April. 1^. — 

 Remarkable for its bright yellow Jiowers, and glossy leaves margined 

 with hairs. 



3. D. rupestris, Br. (Rock Whitlow-grass); scape leafless or 

 rarely with one leaf, petals undivided, pouch oblongo-oval tip- 

 ped with a very short style, leaves plane lanceolate hairy._^ooA. 

 Scot. \.p. 196. — D. hirta, E. Bot. t. 1338. (not Liim.) 



Mountain summits : rare. Upon Ben Lawers and Cairngorum, Scot- 

 land. Ben Hope. Fl. July. "If.. — The slender, perennial root pene- 

 trates deep amongmosses and the crevices of rocks, bearing above many 

 short branches, each crowned with a tuft of lanceolate, soft, plane, entire, 

 or rarely obscurely toothed, hairy leaves ; their margins ciliated ; the 

 hairs mostly simple, sometimes branched, on the surface not unfrequently 

 stellated : scapes several from the same root, 1 — \\ inch high, slender, 

 simple, stellato-pubescent. Pedicels short, pubescent, or rarely gla- 

 brous. Cal. mostly downy. Pouch oval-oblong, pubescent or glabrous. 



4. D.i7ic(ma, L. (twisted-podded Whitlow-grass); cauline leaves 

 several lanceolate toothed hoary with starry pubescence, pouch 

 oblong somewhat twisted. E. Bot. t. 388, (from a cult, specimen). 



Mountain rocks, in much less elevated situations, and far more fre- 

 quent than the last ; in Wales, the N. of England, and Scotland. Fl. 

 June, July. $ . — 4 — 6 inches to a foot or more high, sometimes throw- 

 ing out lateral branches. Lower leaves frequently entire, upper ones 

 deeply toothed, almost cut, acute. Pouch erect, glabrous in British 

 specimens. 



5. D. murdlis, L. (Speedwell-leaved Whitloiv-grass); stem 

 branched, leaves ovate obtuse aniplexicaul toothed, pouch patent 

 glabrous. E. Bot. t. 912. 



Limestone mountainous countries, on rocks and walls. Craven, York- 

 shire. Wardon hills, Bedfordshire. Emborough, Somersetshire. About 

 Forfar, Edinb. and Chelsea, where it has probably escaped from gardens. 

 Blarney Castle, Ireland. Fl. May. Q ,— Six inches to one foot high. 

 Leaves scabrous. Pouch elliptical. 



15. Camel/na. Crantz. Gold of Pleasure. 



1. C* sativa, Crantz, (common Gold of Pleasure); pouch obo- 



vate margined, stigma simple, leaves lanceolate sagittate. 



31yagrum, L. — Alyssmn, E. Bot. t. 1255. 



Fields, occasionally among flax, with which it has been imported. Fl. 

 June, July. . — 2—3 feet high, panicled above. Flowers small, yel- 

 lovv. Pouches very large, on long stalks. 



