98 CRASSULACE^:. (ORPINE FAMILY.) 



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



berry 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 mostlv 

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

 form calyx 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. CRASSULACE^E. (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 many. 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- 



ennial herbs, with cymose conspicuous flowers. 



1. TILLSEA, L, 



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

 reddish. 



1. T. Drummondii, Torr. & Gray. Stems diffuse, dichotomous, about 

 an inch high : leaves oblong-linear, somewhat connate : flowers on pedicels at 

 length as long as the leaves : carpels 12 to ^Q-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 : flowers 

 sessile or on very short pedicels: carpels 8 to 12-seeded. Torr. & Gray, Fl. i. 

 558. From Colorado to Oregon. 



2. S E D IT M, L. STONE-CROP. 

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



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



becoming so: leaves serrate, flat. 



1. S. Rhodiola, DC. Stems 1 to 10 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. 



* * Flowers perfect, in a simple terminal cyme, rose-color or nearly white : leaves 



entire, flat. 



2. S. rhodanthum, Gray. Stem* 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. 



