84 NATURAL HISTOIiY OF PLANTS. 



shrubs, with alternate pinnately dissected or decompound leaves. 

 Flowers terminal {Europr, Asia, N. America). See p. 59. 



19. Crossosoma Nutt. — Calyx 5-merous, imbricate, inserted 

 round tlie very concave receptacle. Petals 5, perigynous. Stamens 

 00 , perigynous, free ; anthers attached by the back above the base, 

 dehiscing by longitudinal lateral clefts. Carpels 2 — o, inserted in 

 the bottom of the receptacle, multiovulatc, separating into two valves 

 when ripe. Seeds reniform, provided at the base with a conspicuous 

 multifid aril ; embryo curved. — A small shrub, with alternate, 

 simple, quite entire leaves. Flowers solitary terminal {California). 

 See p. 62. 



