ParRT 6, 1918] ROSACEAE 507 
usually obtuse at the base and acute at the apex, more or less doubly glandular-serrate, shining 
above, paler beneath, glabrous on both sides, glandular-granuliferous beneath; flowers usually 
solitary; pedicels glabrous, 1-2.5 cm. long; hypanthium decidedly ellipsoid or pear-shaped, 
in fruit 8-10 mm. thick and 12-15 mm. long, with a distinct neck, and tapering at the base; 
sepals lanceolate, caudate-attenuate, entire, nearly 2 cm. long; tomentose within and on the 
margins, slightly if at all glandular, in fruit erect and persistent; petals broadly obcordate, 
about 2.5 cm. long; styles persistent, distinct, not exserted; achenes inserted in the bottom 
and on the sides of the hypanthium. 
TYPE LOCALITY: Empire City, Colorado. 
DISTRIBUTION: North Dakota and southern Montana to Colorado. 
ILLUSTRATIONS: Garden & Forest 2: f. 121; Dippel, Handb. Laubh. 3: f. 245; Stand. Cycl. 
Hort. f. 3454; Clements, Rocky Mt. FI. #1. 25, f. 1 (in part, ellipsoid fruit; as R. acicularis). 
49. Rosa acicularis Lindl. Ros. Monog. 44. 1820. 
Rosa Sayi Schw. in Keating, Narr. Exp. Long 2: 388. 1824. 
Rosa stricia Macoun & Gibson, Trans. Bot. Soc. Edinb. 12: 324. 1875. 
Rosa Engelmanni S. Wats. Garden & Forest 2: 376, in part. 1889. 
Stem low, about 1 m. high, according to Lindley ‘“‘ about 8 feet high,’’ densely covered 
with straight bristles or weak prickles; branches bristly or sometimes unarmed; stipules adnate, 
usually broad, in the American form pubescent, more or less glandular-granuliferous and glandu- 
lar-ciliate, about 1.5 cm. long; leaflets 3-7, usually 5, elliptic or oval, 1.5—5 cm. long, usually 
simply and regularly serrate, entire towards the base, usually acute at both ends, dull and 
glabrous above, pale and finely and usually rather densely pubescent, in the American form 
sometimes somewhat glandular-granuliferous beneath; flowers usually solitary; pedicels 2—4 
em. long, rarely slightly glandular-hispid; hypanthium glabrous, pear-shaped or elliptic, acute 
at the base, in fruit 1-1.5 cm. broad and 1.5—2 cm. long, usually with a neck; sepals lanceolate, 
about 2 cm. long, tomentose on the margins and within, pubescent and more or less glandular 
on the back, caudate-acuminate, in fruit erect and persistent; petals obcordate, 2—2.5 cm. long; 
styles distinct, persistent, not exserted; achenes inserted in the bottom and on the sides of 
the hypanthium. 
TYPE LOCALITY: Siberia. 
DISTRIBUTION: Alaska to Wyoming, Michigan and northern New York; also in Siberia. 
ILLUSTRATIONS: Lindl. Ros. Monog. fl. 8; Willm. Gen. Rosa ls. opp. 146; pl. opp. 235 (as R. 
Woodsii); Dippel, Handb. Laubh. 3: f. 244. 
Rosa acicularis X blanda. See under R. blanda. 
Rosa acicularis X carolina. See under R. carolina. 
Rosa acicularis X Fendleri. This resembles R. acicularis in the elongate fruit and soft pubes- 
cent lower surface of the leaves, but the stem is less bristly and bears some comparatively stout 
prickles. and the leaflets are decidedly obovate; the stipules are broad, and glandular as well as pubes- 
cent. Golden, British Columbia, J. K. Henry. 
Rosa acicularis X muriculata. ‘This has the fruit of R. acicularis, ellipsoid with a distinct neck, 
and the form of the leaflets of that species, but the leaflets are glandular double-toothed and decidedly 
glandular-muriculate as in R. muriculata. "The stem is both bristly and prickly, the prickles being 
Jee = in the latter species. NNaramantha, on the shores of Lake Okonogon, British Columbia, 
. K. Henry. 
Rosa acicularis X nutkana. This hybrid has the bristly stems, the elongate hypanthium, and 
the narrow, elliptic leaflets of R. acicularis, but the bristles are stronger, some of them stout and 
nearly 1 cm. long, the leaflets are often double-toothed and much less hairy beneath than in R. 
acicularis. Helena, Montana, June 28, 1908, B. T. Butler 819. 
50. Rosa Bourgeauiana Crépin (Bull. Soc. Bot. Belg. 14: 9, hypo- 
nym. 1875); Rydb. Fl. Rocky Mts. 442. 1917. 
Rosa majalis Borrer; Hook. Fl. Bor. Am. 1: 200. 1832. Not R. majalis Herrm. 1762. 
Rosa Sayi S. Wats. Proc. Am. Acad. 20: 340. 1885. Not R. Sayi Schw. 1824. 
Rosa acicularis Bourgeauiana Crépin, Bull. Soc. Bot. Belg. 15: 30. 1876. 
Rosa acicularis Sayi Rehder; LL. H. Bailey, Cycl. Am. Hort. 1555. 1902. 
Stem usually low, 3 or 10 dm. high, densely covered with straight bristles or weak prickles, 
but without infrastipular prickles; stipules adnate, usually dilated, 15-20 mm. long, slightly, if 
at all, pubescent, usually glandular-granuliferous beneath, glandular-dentate or glandular-cili- 
ate, the free portion lanceolate or ovate; petioles and rachis somewhat pubescent and glandular; 
leaflets usually 5 or 7, broadly elliptic, 1.5-5 cm. long, usually rounded or obtuse at both ends, 
