122 



CRASSULACE^E. XVIII. SEDUM. XIX. SEMPERVIVUM. 



erect ; flowers yellow, disposed in short recurved spikes ; leaves 

 linear, scale-formed, reflexed. Native of Spain, on the rocks 

 called Borrequillos, in Sierra Nevada. Perhaps a species of 

 Sempervlvum, ex Bory. ann. gen. 3. (1820.) p. 14. The rest 

 unknown. 



Bory's Stonecrop. PI. J foot. 



110 S. MELANANTHE'RUM (D. C. prod. 3. p. 410.) stems weak; 

 leaves ovate, attenuated at the apex; flowers in corymbose 

 panicles. Native of Spain, in Sierra Nevada, on the rocks of 

 Borrequillos. Flowers small, densely panicled, rather sweet 

 scented. Anthers black. The rest unknown. 



Black-anthered Stonecrop. PI. i foot. 



f- Species only known by name. 



1 S. stoloniferum (Gmel. itin. 3. t. 35. f. 2.). 



2 S. lilidceum (Led. ex Steud. nom.). 



3 S. procumbens (Schrank, bav. p. 726.). 



4 S. Monregalense (Balb.). 



N.B. Rhodlola biternata, Lour. coch. p. 627. is totally dif- 

 ferent from Rhodlola, Lin. and is perhaps a plant belonging to 

 Sapindaceae. 



Cult. The greater part of the species being quite hardy, and 

 all succulent, they therefore succeed best on rock-work, for which 

 they are well adapted. Some of the rarer kinds may be grown 

 in small pots. They succeed best in light, sandy soil, or one com- 

 posed of loam and brick rubbish. All are readily increased 

 by cuttings. The seeds of the annual species only require to 

 be sown on rockwork. There are a few of the species marked 

 greenhouse ; these will require the same treatment as that re- 

 commended for the species of Globulea, see p. 106. 



XIX. SEMPERVrVUM (from semper vivo, to live for ever; 

 the tenacity of life of the Houseleek tribe is well known). Lin. 

 gen. no. 612. Lam. ill. t. 413. D. C. in bull, philom. no. 49. 

 prod. 3. p. 411. 



LIN. SYST. Dodecandria, Dodecagynia. Calyx 6-20-parted. 

 Petals 6-20, oblong, acute. Stamens double the number of the 

 petals. Scales at base of carpels toothed or jagged at the apex. 

 Carpels equal in number to the petals. Herbs sometimes stem- 

 less, with young plants rising from the axils ; or caulescent, 

 without any young plants ; or shrubby and fleshy. Leaves 

 usually revolute. Branches of cymes sometimes disposed into 

 a corymb, and sometimes into a panicle. Petals yellow, white, 

 or purplish. 



SECT. I. CHRONOBIUM (xpovoe, chronos, time, and fiwta, bioo, to 

 live ; plants living only for a time, and are not so tenacious of 

 life as those of the following section). D. C. pi. rar. gard. gen. 

 no. 21. Young plants, none from the axils. Flowers usually 

 yellow, rarely white. Species all natives of the Canary Islands. 



* Shrubby species. 



1 S. AIZOIDES (Lam. diet. 3. p. 290.) stem frutescent, erect, 

 branched ; leaves scattered, obovate, flat, quite entire, glabrous ; 

 flowers corymbose ; petals 5-8, spreading, fy . D. G. Native 

 of Madeira. Sedum aizoides, D. C. pi. grass, t. 4. Sedum 

 divaricatum, Ait. hort. kew. ed. 1. vol. 2. p. 108. Perhaps 

 also Anacampseros divaricata, Haw. syn. p. 113.? Flowers 

 yellow. 



Aizoon-like Houseleek. Fl. May, Jul. Clt. ? Shrub 1 ft. 



2 S. TORTUOSUM (Ait. hort. kew. ed. 1. vol. 2. p. 148.) stem 

 frutescent, erect, branched ; leaves obovate-spatulate, scattered, 

 rather convex beneath ; petals 7-8, spreading ; scales 2-lobed. 

 Tj . D. G. Native of the Canary Islands. Curt. bot. mag. t. 

 296. D. C. pi. grass, t. 156. Flowers yellow. Leaves 11-12 

 lines long and 4-5 lines broad. 



8 



FIG. 30. 



Twisted Houseleek. Fl. Jul. Aug. Clt. 1779. Sh. | to ft. 



3 S. viLLbsuM (Haw. syn. p. 166. rev. 65. but not of Ait.) 

 stem frutescent, erectish, twisted ; leaves obovate, crowded, 

 gibbous beneath, villous ; scales of flower fringed. 1? . D. G. 

 Native of the Canary Islands. Flowers yellow. Leaves 5 

 lines long and 3 lines broad. S. villosum, Ait. is referrible to 

 S. stellatum. 



Villous Houseleek. Fl. Ju. Jul. Clt. 1777. Sh. to | ft. 



4 S. CHIA^TUM (Willd. enum. 1. p. 508. mem. crass, t. 10.) 

 stem frutescent, glabrous ; leaves oblong-obovate, somewhat spa- 

 tulate, mucronate, cartilaginously ciliated ; thyrse panicled, having 

 the branches crowded, with flowers at the apex; petals 6-7. 

 T2 . D. G. Native of the Canary Islands. Coll. hort. rip. 

 append. 4. t. 7. Flowers pale yellow. 



Ciliated-leaved Houseleek. Clt. 1815. Shrub 1 to 1 feet. 



5 S. GLANDULOSUM (Ait. 1. c. p. 148.) stem frutescent; leaves 

 orbicularly spatulate, with clammy margins ; glands globose ; 

 scales of flower wedge-shaped, truncate. Tj . D. G. Native 

 of Madeira. Flowers yellow. Glands fringed, yellow, ex Haw. 

 rev. p. 65. 



Glandular Houseleek. Fl. Mar. May. Clt. 1777. Shrub 



1 to 1 foot. 



6 S. GLUTINOSUM (Ait. 1. C. p. 



147.) stem frutescent; leaves 

 cuneiform, viscid, rather scat- 

 tered, fringed with adpressed, 

 cartilaginous ciliae ; petals 8-10. 

 Tj . D. G. Native of Madeira. 

 Jacq. hort. schcenbr. 4. t. 464. 

 Sims, bot. mag. t. 1963. Ker. 

 bot. reg. t. 278. Branches of 

 panicle loose. Flowers golden 

 yellow. The stem rises to the 

 height of 2 feet, and even more, 

 according to Prince de Salm- 

 Dyck. The fishermen of Ma- 

 deira rub their nets with the 

 fresh leaves of this species, by 

 which they are rendered as du- 

 rable as if tanned, provided they are steeped in some alkaline 

 liquor, (f. 30.) 



Clammy Houseleek. Fl. July, Aug. Clt. 1777. Shrub 1 to 



2 feet. 



7 S. U'RBICUM (C. Smith, mss. Horn, suppl. p. 66. Haw. in 

 phil. mag. 1827. p. 125.) stem frutescent, erect, leafy at the 

 top ; leaves broad, cuneiform, glabrous, cartilaginously ciliated 

 on the margins, running into the petiole at the base, broad and 

 blunt at the apex, and ending in a small point, fy D. G. Na- 

 tive of the Canary Islands, on the walls of towns and the roofs 

 of houses. Leaves green. Flowers yellow. Perhaps the same 

 as S. latifolium. Hoffm. verz. 2. p. 208. Haworth's plant is 

 probably the same as that of Hornemann. 



City Houseleek. Fl. Ju. Aug. Clt. 1 816. Shrub 1 to 2 ft. 



8 S. RETU'SUM (Haw. in phil. mag. 1827. p. 125.) stem fru- 

 tescent, simple, leafy at the apex ; leaves broadly cuneated, ex- 

 panded, smooth, ciliated, somewhat cuneated at the apex, trun- 

 cate and retuse. Tj . D. G. Native of Teneriffe, on walls and 

 the roofs of houses. Flowers yellow. Very like S. urbicum, 

 but differs in the form of the leaves. 



Retuse-leaved. Houseleek. Fl. June, Aug. Clt. 1824. Sh. 

 1 to 2 feet. 



9 S. ARsbREUM (Lin. spec. p. 664.) stem arborescent, smooth, 

 branched ; leaves cuneiform, glabrous, ciliated, spreading and 

 rosulate at the tops of the branches ; panicle loose ; petals 9-11. 



Jj . D. G. Native of Portugal, Barbary, Candia, &c. Bradl. 

 succ. pi. 1. t. 31. Ker. bot. reg. 99. D. C. pi. grass, t. 125. 



