520 NORTH AMERICAN FLORA [VoLumME 22 
somewhat glandular-hispid or with weak prickles; leaflets 5—7, elliptic, oval, or obovate, 1-3 em. 
long, rather thin, green and glabrous above, slightly paler, puberulent, and glandular-pruinose 
beneath, often double-serrate, with more or less gland-tipped teeth; flowers in few-flowered 
corymbs or sometimes solitary; pedicels 1-2 cm. long, glabrous; hypanthium globose, glabrous, 
in fruit 8-10 mm. broad; sepals lanceolate, caudate-attenuate, sparingly glandular on the back, 
tomentose on the margins and within, erect and persistent in fruit; petals rose-colored, 
obcordate, about 1.5 cm. long; styles distinct, persistent, not exserted; achenes inserted both 
in the bottom and on the sides of the hypanthium. 
TYPE LOCALITY: New Mexico. 
DISTRIBUTION: Minnesota to British Columbia, Arizona, and Chihuahua. 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 1969; ed. 2. f. 2311 (both as R. Woodsii); Willm. 
Gen. Rosa #/. opp. 175; pl. on 177. 
Rosa acicularis  Fendleri. See under R. acicularis. 
Rosa Bourgeauiana X Fendleri. This resembles R. Fendleri in habit, the corymbose inflores- 
cence and the small flowers and fruit, but the plant is much more prickly, the leaflets firmer and 
more conspicuously double-toothed. Helena, Montana, F. W. Anderson. 
Rosa Fendleri X Macounii. ‘This has the pubescent leaves of Rosa Macounii, but the leaf- 
rachis and stipules are more or less glandular and the fruit is smaller, resembling that of R. Fendleri. 
Helena, Montana, B. T. Butler 873. Montana and Wyoming. 
91. Rosa hypoleuca Wooton & Standley, Contr. U. S. Nat. Herb. 
165 132 @ NOMS: 
Stem low, purplish-brown, 1 m. high or more, armed with rather numerous prickles, which 
are various in length, slender, terete, 3-8 mm. long, some infrastipular, others scattered; 
floral branches 1—2 dm. long, usually armed with small prickles; stipules adnate, about 1 cm. 
long, the lower narrow, the upper dilated, glabrous or glandular-pruinose, but not pubescent 
on the back, glandular-denticulate on the margins; rachis and petiole glandular-pruinose, 
and somewhat glandular-hispid and prickly; leaflets oval, thin, dark-green and glabrous above, 
very pale, slightly glandular-pruinose, but scarcely pubescent beneath, 1—2.5 cm. long, more 
or less doubly-serrate with gland-tipped teeth; flowers corymbose; pedicels glabrous, 1-2 cm. 
long; hypanthium globose, glabrous; petals rose-colored, about 2 cm. long; sepals lanceolate, 
caudate-attenuate, about 1.5 cm. long, glabrous on the back, tomentose on the margins and 
within, in age erect and persistent; styles persistent, distinct, not exserted. 
TYPE LOCALITY: Kingston, New Mexico. 
DISTRIBUTION: New Mexico and Arizona. 
92. Rosa rivalis Eastw. Bull. Torrey Club 32: 198. 1905. 
Stems about 1 m. high, chestnut-brown, terete, glabrous, with a few slender short straight 
prickles 1-4 mm. long; stipules adnate, about 2 cm. long, narrow or the upper dilated, glabrous, 
dentate on the margins, the free portion broad, ovate or broadly semi-lunate, incurved; rachis 
and petiole glabrous or slightly pubescent; leaflets 5—7, usually round-oval, rarely obovate, 
2-5 cm. long, coarsely toothed, thin, wholly glabrous or somewhat pubescent on the veins 
beneath; flowers corymbose, leafy-bracted; pedicels glabrous, 1-2 cm. long; hypanthium 
glabrous, globose; sepals lanceolate, caudate-attenuate, usually with dilated tips, 1.5-2 em. 
long, sparingly glandular on the back, tomentose on the margins and within; petals obcordate, 
rose-colored, about 2 cm. long; styles distinct, persistent, not exserted. 
TYPE LOCALITY: Laytonville, Mendocino County, California. 
DISTRIBUTION: Central California to Oregon. 
93. Rosa chrysocarpa Rydb. Bull. Torrey Club 44: 74. 1917. 
Stem tall, 1-3 m. high, terete, at first light-yellowish-green, later grayish-brown, armed 
with straight prickles, somewhat retrorse, terete, 3-7 mm. long, usually more or less flattened 
at the very base, some of them infrastipular, others scattered, of various lengths; young shoots 
copiously armed with bristle-like prickles; floral branches 1-2 dm. long, armed with mostly 
infrastipular prickles; stipules adnate, glabrous, 1-2 cm. long, the lower narrow, the upper 
dilated, glandular-dentate or ciliate on the margins; petiole and rachis glabrous, sometimes 
