WOOTON AND STANDLEY FLOEA OF NEW MEXICO. 307 



ellipsoidal, not bracteolate; sepals 5, with more or less foliaceous tips; petals broadly 

 obovate to rotund; stamens numerous like the pistils; fruit mostly globose, dry, or 

 somewhat succulent by the softening of the hypanthium. 



KEY T.O THE SPECIES. 



Hypanthium and fruit densely spiny; sepals all or nearly all lobed. 

 Young branches densely lepidote-stellate; leaves usually with 



3 leaflets 1. R. stellata. 



Young branches with a dense covering of short, mostly gland- 

 tipped spines, not lepidote-stellate; leaves mostly with 



51eaflets 2. R. mirifica. 



Hypanthium not spiny; sepals not lobed. 

 Infrastipular spines wanting. 



Flowers corymbose at the ends of tbe branches 3. R. suffidta. 



Flowers solitary at the ends of the branches 4. R. sayi. 



Infrastipular spines present. 



Sepals bristly glandular 5. R. adenosepala. 



Sepal3 not bristly. 



Petioles not glandular, the bracts often glandular- 

 toothed. 

 Spines few, stout, strongly curved; leaflets pale 



and shining, small, thick 10. R. neamexicana. 



Spines numerous, slender, straight or nearly so; 

 leaflets bright green, not shining, large, 

 thin. 



Leaflets short- villous beneath 11. R. pecoseiisi*. 



Leaflets not short- villous beneath 12. R. maximiliani. 



Petioles more or less glandular. 



Leaves finely pubescent beneath, often strongly 

 glandular. 



Spines straight; leaflets oblong to oval 8. R.fendkri. 



Spines recurved; leaflets obovate 9. R. helleri. 



Leaves glabrous beneath. 



Spines numerous, slender, straight 6. R. hypolcuca. 



Spines few, stout, curved 7. R. melina. 



1. Rosa stellata Wooton, Bull. Torrey Club 25: 152. 1898. 



Type locality: Near the Cueva in the Organ Mountains, New Mexico. Type col- 

 lected by Wooton (no. 126). 



Range: Dry slopes, Organ and San Andreas Mountains, New Mexico, in the Upper 

 Sonoran Zone. 



The stellate pubescence of the steins and the large rose purple flowers are very 

 characteristic. This species is to be expected in some of the drier and hotter moun- 

 tains of the southern pan of the state or in northern Chihuahua, hut as yel il lias 

 not been found. It lends itself to cultivation tolerably well, though increased moisture 

 ami a richer soil tend to make it grow slightly taller and cause the flowers to become 

 paler. 



2. Rosa mirifica Greene, Leaflets 2: C2. 1910. 



Type locality: Near the Mescalero Agency, White Mountains, New Mexico. 

 Type collected b j Wooton (no. L93). 

 Range: White and Sacramento mountains of New Mexico, in the I pper Sonoran 



Zone. 



