PART 6, 1918] ROSACEAE 527 
114. Rosa pyrifera Rydb. Fl. Rocky Mts. 445. 1917. 
Stem 1 m. high or more, brown, branched, armed with slender, straight prickles 5-8 mm. 
long; stipules adnate, about 2 cm. long, the lower narrow, the upper dilated, finely puberulent 
and usually glandular-granuliferous on the back; petiole and rachis puberulent and often 
glandular; leaflets about 7, oval, 2-4 cm. long, coarsely serrate, dark-green and glabrous 
above, finely puberulent and more or less glandular-granuliferous beneath; flowers corymbose; 
pedicels glabrous, 1-2 cm. long; hypanthium pyriform or ellipsoid, acute at the base, with a 
distinct neck at the apex, in fruit 10-12 mm. thick and 15-20 mm. long; sepals lanceolate, 
caudate-attenuate, 1.5-2 em. long, more or less glandular on the back, tomentose on the 
margins, in fruit erect and persistent; petals obcordate, about 2 cm. long; styles persistent, 
distinct, not exserted; achenes inserted both in the bottom and on the sides of the hypan- 
thium. 
TYPE LOCALITY: Shores of Lake Pend d’ Oreille, Idaho. 
DISTRIBUTION: Montana, Wyoming, and Utah to eastern California; apparently also South 
Dakota and Nebraska. 
Rosa gymnocarpa X pyrifera. See under R. gymnocarpa. 
Rosa nutkana X pyrifera. This hybrid has the habit corymbose inflorescence, simple-toothed 
leaflets, and ellipsoid hypanthium with a distinct neck, characteristic of R. pyrifera, but the flowers 
are larger, the leaflets larger, less puberulent, somewhat glandular-granuliferous, and coarser toothed; 
the ae are large, stout and flattened as in R. nutkana. Midvale, Montana, July 23, 1903, 
Umbach : 
115. Rosa Pringlei Rydb. Bull. Torrey Club 44: 79. 1917. 
Stem dark gray, 1 m. high or more, terete, slender, unarmed or sparingly armed with 
small, straight infrastipular prickles 3-5 mm. long; branches 1—3 dm. long, usually unarmed; 
stipules adnate, rather narrow, 1 cm. long or less, densely and finely puberulent on the back, 
the free portions lanceolate, ascending, spreading, slightly glandular-ciliate; petiole and rachis 
densely puberulent, not at all glandular; leaflets 5 or 7, elliptic, 2-3 cm. long, acutish at both 
ends, rather firm, finely puberulent on both sides, densely so, almost velvety and paler beneath; 
flowers corymbose, 2—5 together; pedicels 1-2 cm. long, glabrous; hypanthium ellipsoid, acute 
at the base, above produced into a distinct neck, glabrous, in fruit 9-10 mm. thick, 12-14 mm. 
long, dark purple; sepals lanceolate, caudate-attenuate, 12-15 mm. long, finely puberulent, 
in fruit erect and persistent; achenes inserted both in the bottom and on the sides of the 
hypanthium. 
TYPE LOCALITY: Siskiyou County, California. 
DISTRIBUTION: British Columbia to northern California, near the coast. 
116. Rosa Eastwoodiae Rydberg, sp. nov. 
A slender shrub; branches chestnut-brown, armed with slender straight prickles 4-6 mm. 
long; stipules adnate, puberulent, the lower often narrow and entire, the upper very broad and 
slightly glandular-denticulate, the free portion broadly ovate; petiole and rachis puberulent, 
not glandular; leaflets mostly 5, oval, 1-2 cm. long, serrate with broadly ovate teeth, glabrous 
above, puberulent and slightly pruinose beneath; flowers corymbose, subtended by broad 
bracts; hypanthium ellipsoid, acute at the base, with a distinct neck, in age 6-8 mm. thick, 
10-12 mm. long; sepals broadly ovate, caudate-acuminate, 10-15 mm. long, puberulent and 
glandular-ciliate on the margins and the back, erect in fruit; achenes inserted in the bottom and 
on the sides of the hypanthium. 
Type collected at Sisson, Siskiyou County, California, September 4, 1912, Alice Eastwood 2100, 
mainly (herb. Arnold Arboretum). 
DISTRIBUTION: Southern Oregon and northern California. 
Rosa Copelandi X Eastwoodiae. See under R. Copelandi. 
Rosa Eastwoodiae X pisocarpa. See under R. pisocarpa. 
117. Rosa Standleyi Rydberg, sp. nov. 
Stem brown or grayish-brown, about 1 m. high, terete, branched, armed with straight, 
weak, usually paired infrastipular prickles; floral branches seldom 1 dm. long, often unarmed; 
stipules adnate, short and broad, about 1 cm. long, puberulent and glandular-pruinose on the 
