- CRASSULACEA. 387 
| * 
Order XLIX. CRASSULACEAE. 
Crassulacee, Benth. et Hook. Gen. Plant. i. p. 656. | 
Herbs or shrubs, often succulent. About 400 species, referred to fourteen genera. 
They are most abundant in the temperate and subtropical parts of Europe, Western 
Asia, South Africa, and in America, rare in the arctic regions and in Australia, and 
not represented in Polynesia. | | 
| 1. TILLAA. 
Tillea, Linn. Gen. Plant n. 177; Benth. et Hook. Gen. Plant. i. p. 657. 
Small herbs. About twenty species, almost cosmopolitan in their distribution. 
1. Tillea angustifolia, Nutt. in Torr. & Gray, Fl. N. Am, i. p. 558. 
OreGgon southward.—Norrtu Mexico, San Luis Potosi, 6000 to 8000 feet (Parry & 
Palmer, 680; Schaffner). Hb. Kew. 
2. BRYOPHYLLUM. 
Bryophyllum, Salisb. Parad. Lond, t. 3; Benth. et Hook. Gen. Plant. i. p. 658. 
A genus of four species, two of which inhabit Madagascar, one South Africa, and the 
following :— 
1. Bryophyllum calycinum, Salisb. Parad. Lond. t. 3; Bot. Mag. t. 1409. 
Widely dispersed in the Tropical and Subtropical Regions of both hemispheres, and 
extending to—Soutn Mexico, Orizaba (Botteri, 933), Mineral del Monte, Omitlan, and 
Cuesta Blanca (Lhrenberg). Hb, Kew. 
3. COTYLEDON. 
Cotyledon, Linn. Gen. Plant. n. 578; Benth. et Hook. Gen. Plant. i. p. 659, 
About sixty herbaceous and shrubby species, usually having fleshy leaves. They 
inhabit Southern and Western Europe, the whole of Africa, the Himalayan Mountains, 
Eastern Asia, Mexico, and California; and one species is a native of Peru. The sub- 
genus Echeveria is peculiar to America, having its centre in Mexico. 
1. Cotyledon acutifolia, Baker in Ref. Bot. i. sub tab. 71. n. 34. 
Echeveria acutifolia, Lindl. Bot. Reg. xxviii. t. 29. 
South Mexico, Oaxaca (Hartweg) ; GuateMALA, Duefias, 5000 feet (Salvin & Godman). 
Hb. Kew. : 
2. Cotyledon adunca, Baker in Ref. Bot. t. 60. 
MEXIco. | 
3. Cotyledon agavoides, Baker in Ref. Bot. t. 67. a 
Echeveria agavoides, Lemaire, Ill. Hort. x. Suppl. p. 78. 
MEXICO. 
38a 2 
