STANDLEY — FLORA OF GLACIER PARK. 365 



5 Rubus leucodermis Dougl. Black raspberry. Frequent about Lake 



McDonald, usually in rather thin woods. B. 0. to Calif., Utah, and Mont.-Stenis 



^bout a meter high, glaucous, prickly; leaflets broadly ovate, 4 to 10 cm. long, white 



beneath; petals shorter than the sepals. 



The fruit is of good flavor. 



12. ROSA L. Rose. 



Shrubs, usually armed with prickles; leaves pinnate, the leaflets toothed; flowers 

 larc^e solitary ©/clustered, the petals pink; stamens numerous; fruit red or orange, 

 consisting of a thickened fleshv wall (hypanthium), with numerous seedlike achenes 

 on the inside.— The Blackfoot Indians used a drink made from the roots as a remedy 

 for diarrhea. Doubtless they, like other American Indians, ate the fruits, at least 

 in times of famine. 



-Sepals early falling from the fruit 1- R- fymnocarpa. 



:Sepals remaining upon the top of the fruit. 



Stems without a pair of prickles just below the base of the petiole. 



Fruit pear-shaped, with a distinct neck 2. R. acicularis. 



Fruit globose, almost without a neck 3. R. bourgeauiana. 



Stems usually with a pair of prickles just below the base of each petiole. 



Flowers mostly solitary; fruit usually about 1.5 cm. thick .... 4. R. nutkana. 

 Flowers mostly clustered; fruit usually 1 cm. thick or less. 



Fruit pear-shaped, with a distinct neck 5. R. pynfera. 



Fruit globose, the neck usually none. 



Petioles with fine glands and glandular hairs 6. R. fendlen. 



Petioles without glands. ' 



Leaflets glabrous beneath or nearly so 7. R. woodsu. 



Leaflets finely pubescent beneath 8. R. ultramontana. 



1 Rosa gymnocarpa Nutt. Frequent on the west slope at low and middle alti- 

 tudes, in thin or deep woods. B. C. to Calif, and Mont.-Slender shrub, usually about 

 60 cm. high, armed with slender straight prickles; leaflets 5 or 7, 1 to 3 cm. long, thm, 

 •glabrous; flowers solitary; petals 1 to 2 cm. long; fruit 8 to 10 mm. long. 



A rather handsome shrub when in fruit. The berry-like fruit is different m 

 appearance from that of our other roses. 



2 Rosa acicularis Lindl. Occasional on the west slope at low altitudes, on lake 

 shores and brushv hillsides. Alaska to Wyo., Mich., and N. Y.-About 1 meter 

 high; leaflets 3 to 9, 1.5 to 4 cm. long, pale beneath and finely hairy; petals 2 to 2.5 

 cm. long; fruit 1.5 to 2 cm. long. 



3. Rosa bourgeauiana Crep. Common at low and middle altitudes, in woods or 

 thickets or on open slopes. Mont, to Colo, and Ont.— Usually 0.5 to 1 meter high, 

 with very numerous straight prickles; leaflets mostly 5 or 7, 1 to 4 cm. long, pale 

 beneath and finely pubescent; petals 2 to 2.5 cm. long; fruit 1 to 1.5 cm. thick. 



The most common rose of the park. 



4. Rosa nutkana Presl. Occasional at low altitudes, in wet thickets or along moist 

 cliffs. Alaska to Calif, and Wyo.— Usually 0.5 to 1 meter high, armed with straight 

 prickles; leaflets 5 to 9, 1.5 to 5 cm. long, nearly glabrous; petals 2 to 3 cm. long. 



6. Rosa pyrifera Rydb. Low thickets about Lake McDonald. Wash, to Calif., 

 Wyo., and Mont.— Plants 0.5 to 1 meter high, armed with a few straight prickles; 

 leaflets 5 or 7, 2 to 4 cm. long, pale beneath and finely hairy; petals about 2 cm. long; 

 fruit 1.5 to 2 cm. long. 



About Bel ton there is a curious form of this species with wholly unarmed stems. 



6. Rosa fendleri Crep. Belton, in thin woods. Mont, to Ariz., N. Mex., and 

 S. Dak.— About a meter high, armed with slender straight prickles; leaflets 5 or 7, 

 1 to 3 cm. long, glandular beneath; petals about 1.5 cm. long. 



