STONE-CKOP FAMrLY. 265 



Flowers Clustered; petals broadly subulate; follicles 1 to 2-seeded. . . 

 „, ,. 1. T. minima. 



Flowers solitary; petals oblong; follicles several seeded . 2. T. Dnimmondii. 



1. T. minima Miera. Simple or with several ascending or erect 

 branches, J to 3 in. high; herbage of the adult plants reddish; leaves 

 ovate or oblong, obtuse, 1 line long; flowers axillary, subsessile or 

 occasionally on pedicels 1 or 2 lines long; sepals, petals and stamens 4, 

 the sepals equaling the broadly subulate petals; follicles 1 to 2-seeded. 



Common on finely disintegrated sandstone or other rock from 

 Vanden (Solano Co.) and Sonoma southward. Mar.-Apr. 



2. T. Drummondii T. & G. Stems very slender, dichotomous, 

 decumbent at base and rooting at some of the lower nodes, 1 in. long 

 or more; leaves linear-oblong, acute, 1 to 2 lines long; pedicels at 

 length equaling or exceeding the leaves; petals oblong, red, 2 to 3 

 times the length of the calyx-lobes; carpels obtuse. 



Moist places in the lower Sacramento Valley. May. 



Var. Bolanderi Wats. (T. Bolanderi Greene.) Stems 3 in. long; 

 leaves 2 lines long; flowers on short pedicels; pedicels elongated 

 in fruit (6 lines long). — Presidio, San Francisco. May. 



2. SEDUM L. Stonk Crop. 

 Fleshy glabrous herbs, erect or decumbent, with alternate leaves. 

 Flowers pale yellow or white, in terminal often 1-sided cymes. 

 Calyx divided nearly to the base into 4 or 6 sepals. Petals distinct. 

 Stamens perigynous, the alternate ones usually attached to the 

 petals. Pistils distinct, rarely united at the base, becoming few to 

 many-seeded follicles, spreading when ripe; styles usually short. 

 (From the Latin sedeo, to sit, on account of the lowly habit.) 



Basal leaves in rosettes. 



Leaves thick, not nerved; perennial 1. .S. spathulifolium. 



Leaves comparatively thin, very obviously nerved when dry; perennial (?) 



2. S. radiatum. 

 Leaves all scattered, 1 to 2 lines long ; annual . . . .S.S.pumilum. 



1. S. spathulifolium Hook. Glaucous; leaves flat, obovate or 

 spatulate, obtuse, 5 to 9 lines long, either condensed in small some- 

 what depressed rosettes which are sessile on the caudex or on its 

 prostrate branches, or sessile on the flowering branches, the latter 

 rather smaller; flowering stems ascending, 4 to 6 in. high; flowers on 

 short pedicels or sessile, 3 lines long, yellow; petals lanceolate, acute, 

 twice longer than the ovate acute sepals, scarcely exceeding the 

 stamens and style. 



Common on rocky walls on the north or shady side of canons: 

 Mt. Diablo; Oakland Hills and northward. 



2. S. radiatum Wats. Perennial; stems several, simple or 

 branching, from a slender rootstock, 4 to 6 in. high; cauline leaves 

 oblong to oblong-ovate, acute, sessile by a rather broad base, 3 to 5 or 

 6 lines long, nearly or quite as long as those of the globose or oblong 

 rosettes at the base of the stem, all when dry delicately but rather 

 conspicuously nerved; sepals short, triangular, acute; petals yellow, 



