CRASSULACEAE. 165 



Stamens usually 4. Petals 2, posterior, free or united at 

 the base, entire or 2-3-lobed, persistent. Disk none. 

 Stamens 3-10. Ovary 4-angled, 4-beaked. Capsule 

 4-sulcate, many-seeded, opening at the summit. 



1. O. glaucescens Camb. Annual or biennial; 15-30 cm. high, 

 branching at base, the branches ascending; leaves often fascicled 

 and somewhat fleshy, 1-2 cm. long; spikes elongated terminal, the 

 stem-like branches bracteate, densely flowered; petals oblong, ob- 

 scurely lobed, posterior; stamens 3, posterior; capsule depressed 

 globose, 3 mm. in diameter, 4-lobed, 4-cuspidate; seeds smooth. 



In low saline places. Portugese Bend; Elsinore; also at San 

 Diego and Tia Juana. April-May. 



Family 41. CRASSULACEAE. Stone-crop Family. 



Mostly succulent or fleshy herbs with cymose or rarely 

 solitary, regular or symmetrical flowers. Stipules none. 

 Calyx persistent, free from the ovary or ovaries, 4-5-cleft 

 or 4-5-parted. Petals equal in number to the calyx- 

 lobes, distinct or somewhat united below, persistent. 

 Stamens of the same number or twice as many with fili- 

 form or subulate filaments and longitudinally dehiscent 

 anthers. Receptacle with a scale at the base of each 

 carpel. Carpels equal to the calyx-lobes in number, 

 distinct or united below, with subulate or filiform styles 

 and numerous ovules. Follicles membranous or coria- 

 ceous, 1-celled, dehiscent along the ventral suture. Seeds 

 minute; embryo terete, imbedded in fleshy endosperm. 



Plants not minute. 



Petals distinct or only slightly united at base, 

 spreading. 

 Leaves not linear; petals distinct. 1. Sedum. 



Leaves linear; petals slightly united at 



base. 2. Hasseanthus. 



Petals united into a tube at base. 



Petals spreading. 3. Stylophyllum. 



Petals erect. 4. Dudleya. 



Plants minute, fleshy. 5. Tillaea. 



1. SEDUM L. 



Fleshy mostly glabrous erect or decumbent herbs 

 with mostly alternate entire or dentate leaves and per- 



