GO ENGLISIJ BOTANY. 



Yerv like vnr. 3 of S. clcsraus, but a smaller and more deliaatc-i 

 looking plant, with the leaves bright-greeu, falling off more readily, 

 and leaving only the terminal rosette ; the flowers also are smaller, 

 and tlie l)ranches of the cyme shorter, sometimes so short that the 

 cyme looks like a head. 



There are two forms of this, — one, apparently much the more 

 common (Craig Breidden, Montgomery ; Stanner, Radnor, &c.), 

 which grows in ordinary garden soil ; the other, which Mr. TI. C. 

 Watson received from Mr. Borrer as S. Forsterianum, from Wales, 

 is a more slender plant than the first, and can only be induced to 

 grow by keeping it constantly damp. 



Dr. AVirtgen lays stress on the shape of the spur to separate his 

 S. aureum from S. Eorsterianum ; but this is an inconstant cha- 

 racter, as different forms may be seen on the same plant. 



Forster's Stone-crop. 



GENUS III.—S EMPERVIVUM. Zinn. 



Calyx of 6 to 20 sepals, united at the base. Corolla of 6 to 20 

 petals, united for a little way at the base to each other and to the 

 filaments, rarely entirely free from each other. Stamens twice 

 as many as the petals, in 2 rows, but half of them frequently 

 sterile. Hypogynous scales at the base of the carpels toothed or 

 cut at the apex. Eollicles as many as the petals, many-seeded. 



Herbs, often with very compact flattened barren rosettes of 

 oblong fleshy leaves, or in many exotic species fleshy shrubs. 

 Elowers yellow, rose-colour, purple, or white, in corymbose or 

 paniculate cymes, with unilateral-flowered scorpioid branches. 



The name of this genus of plants expresses their tenacity of life. Semper vivere, " to 

 live for ever," is truly its name ; and this property is shared by the whole of the House- 

 leek tx'ibe. 



SPECIES I.— SEMPERVIVUM TECTORUM. Linn. 



Plate DXXXVIII. 



Stem producing barren shoots from the axils of the lowest 

 leaves. Barren shoots consisting of regular rosettes on naked stalks. 

 Leaves flat, very fleshy, oblong or oblanceolate-oblong, acuminate 

 and somewhat mucronate, ciliated, otherwise glabrous. Plower- 

 ing-stem erect, simple, glandular - pubescent, with distant leaves, 

 of which the upper ones are glandular-j)ubescent. Plowers shortly 

 stalked, in a corymbose cyme or a corymbose-topped panicle, with 

 scorpioid branches. Calyx-segments 12, strapshaped - lanceolate, 

 acute, xlivided two-thirds of the distance to the base, glandular- 

 pubescent. Petals strapshaped, acuminate, much longer than the 



