LXXXV. DBOSERACE^E. 



405 



ovuled, distinct [connate in Diamorpha, Penthorum, Triactina] ; styles continuous 

 with the back of the ovaries ; stigma subterminal, on the ventral face ; ovules 2-seriate 

 along the ventral suture, horizontal or pendulous, anatropous. FOLLICLES free, 

 dehiscence ventral. SEEDS very small, testa membranous. EMBRYO straight, exal- 

 buminous, according to Brongniart, [albuminous according to others] ; cotyledons very 



short ; radicle next the hilum. 



PRINCIPAL GENERA. 



Tillsea. * Crassula. * Rochea. * Bryophyllum. * Kalanchoe. 



* Cotyledon. * Sedum. * Sempervivura. * Ecbeveria. 



To Crassulacece belongs the Bryophyllum calycinum, an undershrub of the tropical regions of the Old 

 World, quoted in the Introduction (p. 7). Crassulacea are connected with Saxifragece, Francoacece. and 

 Cephalotea (see those families). They inhabit warm temperate regions of the Old World, and, owing to 

 the fewness of their stomata, and consequent slight transpiration, they remain green in the most arid 

 countries. They especially abound beyond the tropic of Capricorn ; half of the known species live in 

 South Africa, the sixth part in Europe and the Mediterranean region, and an equal number in Central 

 Asia and the Canaries, and in sub-tropical America, Southern Asia and Australia. 



The watery juice of Crassulaceee contains, besides an abundance of albumine, astringent principles 

 and malic acid, free or combined with lime. The useful species are the following : Sempervimim 

 Tectorum (House Leek). Juice taken as a refreshing drink, and united to some fatty body applied 

 externally for burns and bleeding. The leaves are also used to remove corns; a property also 

 possessed by Crassula Cotyledon and arboresrens. Sedmn album (White Stonecrop). Juice astringent, 



refreshing. S. Telephium (Orpine). Formerly cultivated as a pot- 

 herb. Juice employed to remove corns and to heal wounds. & 

 acre (Biting Stonecrop). Purgative and emetic if taken internally, 

 rubefacient outwardly, and recommended for bad ulcers. S. re- 

 Jlexum. Refreshing, diuretic, vulnerary. Crassula rubens. Leaves 

 employed as a vulnerary. Umbilicus pendulinus (Navelwort). An 

 emollient, employed outwardly for hard nipples. 



LXXXV. DROSERAC&M. 



, Salisbury. DROSERACEJE, D.C.) 



Sundew. (Drotera rotundifolia.) 



Drosera. 

 Vertical section of flower (mag.). 



Drosera. Seed (mag.). 



