XXX. CRASSULACE^J. 161 



and the flowering summits more or less viscid, with short, glandulaf 

 hairs ; the leaves thicker, and more frequently opposite ; the cymes or 

 flowers more compact, of a dead white tinged with rose-colour ; and 

 the petals broader and not so pointed. 



Much more widely spread on rocks and walls, in western, central, and 

 southern Europe, than S. anglicum, but does not extend eastward to the 

 Russian territory, nor northward into northern Germany. In Britain, 

 only found on old walls, &c., in southern England, and in Cork county, 

 Ireland, where it is not really indigenous. PL summer. 



5. S. album, Linn. (fig. 365). White S. Stock creeping and pro- 

 cumbent, bearing in winter short barren stems with crowded leaves, and 

 in summer erect flowering branches, from 4 to 6 inches high, and 

 perfectly glabrous. Leaves scattered, oblong or cylindrical, 3 to 6 

 lines long. Flowers of a pure white or slightly pink, rather small 

 and numerous, in elegant terminal cymes or corymbs. Sepals short 

 oval, and obtuse. Petals nearly three times as long, oblong and 

 obtuse. 



On old walls, rocks, cottage roofs, &c., over the greater part of 

 Europe and Russian Asia, except the extreme north. In Britain 

 perhaps truly indigenous in the Malvern Hills and in Somersetshire ; 

 and Mr. Carrol reports that a variety with short thick leaves is found 

 on the south coast of Ireland, near Cork ; in other places where the 

 species has been observed, it had probably been introduced from 

 gardens. Ft. summer. 



6. S. villosum, Linn. (fig. 366). Hairy S. An annual, with erect, 

 nearly simple stems, 3 to 4 inches high ; the upper part of the plant 

 always more or less covered with short, viscid hairs, like S. dasy- 

 phyUum. Leaves more than twice, often 4 or 5 times, as long as thick, 

 alternate or scattered. Flowers few, of a pale, rather dingy rose 

 colour, in a small, rather loose, terminal cyme. Sepals ovate and green. 

 Petals ovate, about twice as long as the calyx. 



In bogs and along stony rills, in the mountains of western, central, 

 and northern Europe, frequent in northern England and the Scotch 

 Highlands, but not recorded from Ireland. PI. summer. 



7. S. acre, Linn. (fig. 367). Watt-Pepper. Tufts perennial and pro- 

 cumbent, consisting of numerous short barren stems, and erect or 

 ascending flowering branches, from 1 to 2 or 3 inches high ; the whole 

 plant quite glabrous, assuming a yellowish tinge, and biting to the 

 taste when chewed. Leaves small, thick, ovoid, or sometimes nearly 

 globular, those of the barren shoots usually closely imbricated in six 

 rows. Flowers of a bright yellow, in small terminal cymes. Sepals 

 very short. Petals much longer, narrow-oblong and pointed. 



On walls and rocks, in stony and sandy places, throughout Europe 

 and Russian Asia, from the Mediterranean to the Arctic regions. 

 Abundant in Britain. PI. summer. 



8. S. sexangulare, Linn. (fig. 368). Tasteless S. Very near S. acre, 

 and by some considered as a mere variety, differing only by the more 

 slender leaves, several times longer than thick, and by the flavour said 

 to be less acrid. 



A rather scarce plant, scattered over central and eastern Europe. 

 Indicated in some parts of England, especially on old walls, in some of 

 the eastern counties, but it is not indigenous. PL summer. 



L 



