88 KOSACE^E. (ROSE FAMILY.) 



- +- Infrastipular spines present, often with scattered prickles : leaflets 5 or 7 . 

 + Sepals entire. 



4. R. Nutkana, Presl. Stems stout, 1 to 4 feet high, armed with stout 

 straight or recurved spines : stipules dilated, glandular-ciliate ; leaflets rounded 

 at base, usually resinous beneath, the teeth more or less glandular-serrulate : 

 flowers solitary (rarely 2 or 3), 2 or 3 inches broad: fruit globose, 6 lines broad. 



From N. Utah (in the Wahsatch) and Idaho to Oregon and northward. 

 Unarmed forms and others with slender spines are reported from W. Mon- 

 tana ( Watson). 



5. R. Fendleri, Crepin. Stems often tall (6 or 8 feet high, or less), 

 with rather slender straight or recurved spines : stipules mostly narrow and 

 usually naked ; leaflets cuneate at base and often petiolulate, usually glaucous, 

 finely pubescent beneath or glabrous or somewhat resinous, the teeth usually 

 simple : flowers smaller, corymbose or often solitary : fruit globose, 4 lines broad. 



From W. Texas and New Mexico to the Sierra Nevada, and northward into 

 British America. 



w- -w- Outer sepals laterally lobed. 



6. R. Woodsii, Lindl. Stems \ to 3 feet high, with slender straight or 

 recurved spines : stipules narrow or dilated, entire ; leaflets obtuse or usually 

 cuneate at base, glabrous or pubescent above, villous or pubescent or glabrous 

 beneath, simply toothed or resinous and serrulate-toothed : flowers corymbose 

 or solitary, 1^ to 2 inches broad, on very short naked pedicels: fruit globose, 

 4 or 5 lines broad. From Missouri and Colorado to W. Montana and the 

 Saskatchewan. On the plains and in the valleys. 



* # Sepals spreading after flowering and deciduous : infrastipular spines present. 



7. R. gymnocarpa, Nutt. Stem slender and weak, 2 to 10 feet high, 

 with straight slender spines : stipules narrow, glandular-ciliate ; leaflets 5 to 9, 

 glabrous, doubly glandular-toothed, sessile or nearly so : flowers solitary or 

 few : sepals 3 or 4 (rarely 6) lines long, entire, deciduous (with the few 

 distinct styles) from the very contracted top of the naked oblong-obovate to 

 globose fruit. In the Pacific States, but extending eastward into N. W. 

 Montana and N. Idaho. 



23. CRAT^IGUS, L. THORN. 



Calyx-tube pitcher-shaped ; the limb 5-parted. Petals 5, spreading. Sta- 

 mens 5 to 20. Shrubs or small trees : leaves simple, toothed, or lobed : 

 flowers corymbose, mostly white. 



1. C. rivularis, Nutt. Spines few, short and stout : leaves rather rigid, 

 lanceolate-ovate, simply serrate, only the upper ones of the shoots broader, 

 doubly serrate or rarely slightly incised ; with narrow, glandular-incised stip- 

 ules : calyx-lobes usually glandular : fruit black : nutlets 3 lines long or over, 

 usually strongly ridged on the back. Torr. & Gray, Fl. i. 464. Mountains 

 of Colorado and Utah, and westward to the Pacific. 



C. DOUGLASII, Lindl., with broader, thinner, doubly serrate leaves, broad 

 stipules, and smaller black-purple fruit, is reported from Montana, but proba- 

 bly occurs only west of our range. 



