98 CRASSULACE^. (^ORPINE FAMILY.) 



§ 3. Thornless and prickless : leaves convolute in the hud : calyx-tube elongated: 

 herrij naked and glabrous. 

 13. R. aureum, Pursh. Five to twelve feet high, glabrous or almost so, 

 glandless : leaves 3 to 5-lobed: racemes short, 5 to 10-flowered, with mostly 

 foliaceous bracts : flowers golden-yellow, spicy-fragrant : tube of the salver- 

 form calvx 3 or 4 times longer than the lobes : berry yellowish turning black- 

 ish. — Colorado and northward, westward to the Pacific coast; also common 

 in cultivation throughout the Atlantic States. Known as the Buffalo or 

 Missouri Currant. 



Order 28. CKASSULACEJE. (Orpine Family.) 



Succulent or fleshy plants, mostly herbaceous, and not stipulate, with 

 completely symmetrical as well as regular flowers, with all the parts 

 distinct, the carpels becoming follicles in fruit. 



1. Tillsea. Parts of the flower each 3 to 5 : the stamens only as manj'. Small annuals, 



with opposite leaves and minute axillary flowers. 



2. Sedum. Parts of the flower each 4 to 7 : stamens twice as many. Low annual or per- 



enuial herbs, with cymose conspicuous flowers. 



1. TILL ^ A, L. 



Seeds longitudinally striate. — Glabrous : leaves entire: flowers white or 

 reddish. 



1. T. Drummondii, Torr. «Sb Gray. Stems diffuse, dichotomons, about 

 an inch high: leaves oblonq-linear, somewhat connate: floivers on pedicels at 

 length us long as the leaves : carpels 12 to 20-seeded. — Fl. i. 558. S. W. Colo- 

 rado to Texas and Louisiana. 



2. T. angustifolia, Nutt. Stems decumbent, rooting at base, diffusely 

 branched, an inch long : leaves linear, connate, a line or two long : flon-ers 

 sessile or on very short pedicels: carpels 8 to l2-seeded. — ToTT. & Gray, Fl. i. 

 558. From Colorado to Oregon. 



2. SEDUM, L. Stone-crop. 

 Sepals united at base. — Flowers rarely dioecious, in cymes, often secund. 



* Flowers mostlg dioecious, in a regular compact compound cyme, deep purple or 



becoming so: leaves serrate, flat. 



1. S. Rhodiola, DC. Stems 1 to lO inches high, from a thick fragrant 

 root, leafy • leaves alternate, oblong-oblanceolate : cyme sessile : flowers on 

 short naked pedicels, usually 4-merous. — From Colorado northward to the 

 Arctic coast, and eastward across the continent. 



* * Floioers perfect, in a simple terminal cyme, rose-color or nearly ivhite: leaves 



entire, flat. 



2. S. rhodanthum, Gray. Stems a half to a foot high, from a thick 

 root : leaves scattered, oblong or oblanceolate : flowers large, mostly 4-merous. 

 — Mountains of Colorado, Utah, and Montana. 



