ROSACE.E. (ROSI-: FAMILY.) 81 



flowers sessile, tomentose : limb of the cali/x deephj toothed ; tail of tlie akoiie 

 at length 2 or 3 inches long. — Torr. & (Jray, V\. \. 427. W. Wyoming an«l 

 through the \\'as;itth to the iSierras ;uul northward. 



2. C. parvifolius, Nutt. A shrub u.sually 2 to 10 feet high (i^oineliuKW 

 15 to 20 feet) : leaves cuneate-obovate, less coriaceous, serrate towards the ol>tus, 

 or rounded summit, more or less silky above, densely hoary-tonicntose iH'iieath . 

 flowers on short slender pedicels: limb of the rali/r irilh short ttrth: tail of thw 

 akene often 4 inches long. — From New Mexico to Wyoming ami westward to 

 the coast. 



11. COWANIA, Don. Cliff Uosk. 



Petals obovate, spreading. Stamens numerous, in 2 rows, in.'^erted with th« 

 petals at the throat of the calyx-tube. Carpels den.sely villous. Fruit coria- 

 ceous, narrowly oblong, striate, uearly included in the dilated caly.x-tui>e. — 

 Leaves small, tootlied or pinnatifid, coriaceous, glandular-dotted. 



1. C. Mexican a, l)*)n. A much branched shrub, 1 to 6 feet high ; the 

 trunk witli abundant shreddy light-colored Itark: leaves ap])ro.\imate u|>on 

 the short branchlets, cuneate-obovate in outline, pinnately 3 to 7-lol)ed, dark 

 green above, tomentose beneath: flowers yelbjw, the caly.x-tube attenuate into 

 a short glandular-hairy pedicel : tail of the akene at length 2 inches long or 

 more. — N. Utah and S. Colorado to Central Mexico. 



12. FALLUGIA, Fndlicher. 



Calyx-tube villous within; the 5 lobes with alternate linear bractlets. Sta- 

 mens numerous, inserted in a triple row upon the margin of the calyx-tul>e. 

 Carpels densely villous, inserted upon a small conical receptacle. Fruit coria- 

 ceous, narrowly oblong, exserted. — A low uudershrub : leaves pinnately 

 lobed, margin revolute : flowers white. 



1. F. paradoxa, Endlicher. Much branched with somewh.it virgate 

 slender branches ; epidermis white, persistent : leaves scattered or fascicletl, 

 somewhat villous, cuneate and attenuate into a linear base, pinnately 3 to 7- 

 cleft above. — From Colorado to California and southward into Mexico. 



13. DRY AS, L. 



Calyx open, flattish, 8 to 9-parted. Petals large, white r yellowish. — 

 Dwarf and matted .slightly shrubby plants, with simple toothed leaves and 

 solitary largo flowers. 



1. D. OCtopetala, L. Leaves oblong-ovate, coarsely crenate-toothed. 

 obtuse at each end, clothed with a white tomentum beneath, the veins prt>mi- 

 nent, the margins revolute : sepals linear. — Aljiine. High peaks of Colorado 

 and northward throughout Britisli America to Greenland. 



14. GEUM, L. AvKXs. 



Calyx-lobes usually witlj ;") .ilternato bractlets. Carpels on a conical or 

 clavate receptacle. Akeues small, comjjre.^.^ed. — Perennial herbs: leavoa 

 mostly radical, lyrate or pinnate; stipules aduiUc to the sheathing j>eliolc«; 

 flowers rather large, solitary or corymbose. 



Q 



