Part 6, 1918] ROSACEAE 503 
35. Rosa rudiuscula Greene, Leaflets 2: 134. 1911. 
Stem stout, mostly simple, about 1 m. high, terete, gray, bristly and armed with very 
small prickles, which are very slender and 3-5 mm. long; stipules adnate, narrow, mostly en- 
tire, densely pubescent and glandular on the back, about 1 cm. long, the free portion ovate or 
lanceolate and spreading; petiole and rachis densely pubescent and glandular; leaflets 5 or 7, 
mostly crowded, subcoriaceous, coarsely serrate, elliptic or oval, acute at each end, 2-3 cm. 
long, dark-green, glabrous and shining above, paler and densely pubescent beneath; flowers 
corymbose; pedicels very short, rarely 1 cm. long, usually densely glandular-hispid; hypan- 
thium globose, glandular-hispid, in fruit 12 mm. thick and red; sepals lanceolate, caudate- 
attenuate, 15-20 mm. long, glandular on the back, mostly entire, reflexed, at last deciduous 
in fruit, styles distinct, persistent, not exserted; achenes inserted in the bottom of the hypan- 
thium. 
TYPE LOCALITY: Northwestern part of Missouri. [More exactly supplied from the label: 
Little Blue, Jackson County.] 
DISTRIBUTION: Iowa and Missouri to Oklahoma. 
36. Rosa Treleasei Rydberg, sp. nov. 
Stems slender, terete, reddish, 5-10 dm. high, armed with slender, terete, straight, dark- 
brown infrastipular prickles, which are 5-10 mm. long; young stems more or less bristly; stip- 
ules adnate, narrow, about 1 cm. long, glabrous, entire, the free portion lanceolate, ascending; 
petioles and rachis glabrous, sparingly armed with bristles or weak prickles; leaflets 5, sub- 
coriaceous, lanceolate or lance-elliptic, acute, 2-4 em. long, sharply serrate, acute at both 
ends, glabrous on both sides or sparingly pubescent on the veins beneath; flowers solitary or 
in pairs; pedicels 2-3 cm. long, sparingly glandular-hispid; hypanthium globose, sparingly 
glandular-hispid, in fruit bright red, about 1 cm. thick; sepals lanceolate, caudate-attenuate, 
soon deciduous; achenes inserted in the bottom of the hypanthium. 
Type coilected at Alden Bridge, Louisiana, June 30, 1898, Trelease (herb. Mo. Bot. Gard.). 
37. Rosa texarkana Rydberg, sp. nov. 
Stems terete, 1 m. high, slender, armed with slender, terete, straight prickles, which are 
5-8 mm. long, as well as conspicuously bristly; stipules adnate, about 1 cm. long, rather 
narrow, glabrous, densely dentate on the margin, the teeth ending in stipitate glands, the free 
portion lanceolate and more or less spreading; petiole and rachis copiously glandular-hispid 
and somewhat prickly; leaflets subcoriaceous, 1—4 cm. long, elliptic or oval, acute at both ends, 
sharply serrate, glabrous on both sides, or puberulent beneath, dark and shining above, paler 
beneath; flowers corymbose; pedicels 1-1.5 cm. long, sparingly glandular-hispid; hypanthium 
globose or slightly depressed, in fruit 10-12 mm. thick, sparingly glandular; sepals lanceo- 
late, glandular on the back, caudate-attenuate, soon deciduous; achenes inserted in the bottom 
of the hypanthium. 
Type oes on railroad north of Texarkana, Arkansas, July 24, 1896, H. Eggert (herb. Mo. 
Bot. Gard.). 
DistRiBpuTtIon: Arkansas and northern Mississippi. 
VIII. Cinnamomeae. Upright species with new shoots usually more or less bristly, old 
stems and branches either unarmed or bristly, or armed with infrastipular prickles which 
sometimes are paired; stipules adnate, the upper usually dilated; leaflets 5-11; sepals usually 
entire or some of them with a few lobes, erect and persistent after anthesis; hypanthium 
glabrous or rarely bristly; achenes inserted on the inner walls of the hypanthium as well as 
in the bottom; styles rarely exserted from the mouth of the hypanthium. Native species, 
except R. spinosissima and R. rugosa. 
38. Rosa subglauca Rydberg, sp. nov. 
Stem erect, about 5 dm. high, apparently dying back to near the base, densely bristly, 
otherwise glabrous, terete, simple or somewhat branched above; stipules adnate, 1.5—2.5 cm. 
