94 SAXIFRAGACEJ3. (SAXIFRAGE FAMILY.) 



6. CHEYSOSPLENIUM, Tourn. Golden Saxifrage. 



Calyx-tube coherent with the ovary ; the blunt lobes 4 or 5, yellow within. 

 Stamens inserted on a conspicuous disk. — Low and small smooth herbs, with 

 tender succulent leaves, and small corymbose flowers. 



1 • C. alternifolium, L. Flowering stems erect : leaves alternate, reni- 

 form-cordate, doubly crenate or somewhat lobed. — Colorado and northward. 



7. HE U CHER A, L. Alum-root. 



Calyx 5-cleft, bell-shaped. — Perennials : with the round heart-shaped leaves 

 principally from the rootstock ; those on the scapes, if any, alternate : petioles 

 with dilated margins or adherent stipules at their base: flowers in small 

 clusters disposed in a prolonged and narrow panicle, greenish or purplish. 

 # Stamens and styles exserted. 



1. H. rubescens, Torr. Scape usually naked, glabrous or somewhat 

 scabrous, 8 to 15 inches high : leaves nearly glabrous, suborbicular, cordate 

 at base, slightly lobed, creuate-dentate, the teeth ciliate : panicle loosely many- 

 flowered, often somewhat reddish : petals linear, more or less rose-colored or 

 white. — From New Mexico and S. W. Colorado to the mountains of Nevada 

 and the Wasatch. 



* » Stamens and styles included (at least at first). 

 *- Generally hirsute : flowers rather large. 



2. H. hispida, Pursh. Scapes 2 to 4 feet high, hispid or hirsute with long 

 spreading hairs, scarcely glandular: leaves rounded, slightly 5 to 9-lobed : 

 panicle very narrow : stamens at first included, but soon exserted, longer than the 

 spatulate petals. — Along the Missouri to the mountains, and northward and 

 eastward. 



3. H. cylindrica, Dougl. Commonly hirsute and above glandular-pubes- 

 cent : leaves round-reniform or cordate-ovate, crenately doubly toothed and com- 

 monly lobed : scape 10 to 24 inches high : the greenish flowers in a cylindrical 

 spike or thyrsus: petals inconspicuous or none. — National Park, Montana, and 

 westward into Nevada, Oregon, etc. 



■i- *- Puberulent or glabrous : flowers small. 

 ■w- Panicle glomerate, spicate. 



4. H. bracteata, Seringe. Small, 3 to 6 inches high : scapes numerous 

 from a thick woody caudex : radical leaves roundish-subcordate, incisely 

 lobed, lobes crenately toothed : petals attenuate, scarcely broader than the 

 filaments : styles and stamens at length exserted. — Mountains of Colorado. 



++ -w- Panicle loose, racemose. 



5. H. Hallii, Gray. Minutely glandular-puberulent : scapes 4 to 8 inches 

 high, naked or with 1 to 3 minute subulate bracts : petals narrowly spatulate, 

 obtuse, exsert. — Colorado. 



6. H. parvifolia, Nutt. Scabrous-puberulent : scape naked, 6 inches to 2 

 feet high : leaves roundish-cordate, crenately 5 to 7-lobed : petals minute, cadu- 

 cous: seeds muricate or hispid under a lens. — Torr. & Grav, "Fl. i. 581. From 

 New Mexico northward through Montana. 



