610 



BOTANY 



PART n 



Family 1. Crassulaceae. — Succulent (^^) herbs or under-shrubs with cyuiose in- 

 florescences. Flowers hermaphrodite, with calyx and corolla consisting of a variable 

 number of members. Obdiplostemonous or haplostemonous. Carpels free (Fig. 622), 

 flower hypogynous or perigynous. Scale-like nectaries at the base of the carpels. 



a b 



Fig. G22. — Srdum Tdepliluin. a, Flower; 6, flower in longitudinal .section, (x 4.) 



Fruit a capsule containing numerous seeds with a small amount of endosperm. 

 Mainly found in the old world. 



More Important Genera. — Sedum with pentamerous flowers ; there are a 

 number of British species. Sempervivum, flowers with from six to an indefinite 

 number of members in the whorls ; S. lector um. Bryopliyllum with telranieroiis 



Fig. 623. — Rihcs ruhrum. (j nat. size.) 



flowers, noteworthy on account of the abundant formation of Ijuds in the indenta- 

 tions of the margin of the leaf. Crassula. 



Family 2. Saxifpagaceae ('^). — Herbs or woody plants with I 

 alternate leaves. Flowers hermaphrodite, obdii)lostemonons, tetra- 

 merous or i)entameroiis, perigynous or epigynous. Carpels usually 



