PART 6, 1918] ROSACEAE 499 
villous beneath; flowers 2-4, corymbose or solitary; pedicels 1-4 em. long, more or less glandu- 
lar-hispid; hypanthium usually depressed-globose, more or less glandular-hispid or rarely 
glabrous, in fruit 8-10 mm. broad; sepals lanceolate, caudate-acuminate, glandular-hispid on 
the back, tomentose within, 1.5—2 cm. long; some of them usually with linear or subulate lobes, 
after anthesis reflexed and soon deciduous; petals obcordate, rose-colored, 2—2.5 cm. long; 
styles distinct, persistent, not exserted; achenes attached in the bottom of the hypanthium. 
TYPE LOCALITY: Tennessee. 
DISTRIBUTION: Massachusetts to Georgia, Arkansas, Kansas, and Minnesota. 
Rosa Lyoni X serrulata. This hybrid resembles R. serrulata in habit, in the glandular-hispid 
rachis, the glandular-serrate leaflets and the slender prickles, but the leaflets are more or less hairy 
beneath and broader. Matthews, North Carolina, Biltmore Herbarium 6628. 
Rosa Lyoni X virginiana. See under R. virginiana. 
24. Rosa obovata Raf. Ann. Gén. Sci. Phys. 5: 217. 1820. 
Rosa carolina e Ait. Hort. Kew. ed. 2. 3: 260. 1811. 
Rosa laxa Lind). Ros. Monog. 18. 1820. Not Rosa laxa Retz. 1803. 
Rosa Lindleyi Spreng. Syst. 2: 547. 1825. Not Rosa Lindleyana Tratt. 1823. 
Rosa humilis grandiflora Baker; Willm. Gen. Rosal: 207. 1911. NotR. grandiflora Salisb. 1796. 
Stem slender, terete, about 1 m. high, glabrous, armed with slender, short, terete, mostly 
straight prickles 5-18 mm. long; stipules adnate to the petioles, 1-2 cm. long, mostly narrow 
and entire, sometimes glandular, the free portion lanceolate; petioles and rachis mostly gla- 
brous, often armed with small prickles, sometimes glandular; leaflets mostly 7, obovate or 
broadly oval, 1.5—4 cm. long, acute or often rounded at the apex, coarsely serrate except the 
cuneate base, glabrous on both sides, rather dull and somewhat glaucescent; flowers mostly 
solitary or 2-4 together; pedicels more or less glandular-hispid; hypanthium more or less 
glandular-hispid, globose or depressed-globose, rounded at the base, in fruit about 12 mm. in 
diameter; sepals lanceolate, caudate-attenuate, 15-20 mm. long, glandular-hispid on the back, 
tomentose within, more or less lobed, after anthesis reflexed and deciduous in fruit; petals 
about 3 cm. long, obcordate, rose-colored; styles distinct, persistent, not exserted; achenes 
attached mainly in the bottom of the hypanthium. 
TYPE LOCALITY: Mountains of the Highlands and Catskills, New York. 
DISTRIBUTION: Maine to Delaware, Missouri, and Michigan. 
ILLUSTRATIONS: Lindl. Ros. Monog. pl. 3; Willm. Gen. Rosa pl. opp. 66. 
25. Rosa carolina L. Sp. Pl. 492. 1753. 
Rosa humilis Marsh. Arbust. 136. 1785. 
Rosa parviflora Ebrh. Beitr. 4:21. 1789. 
Rosa pennsylvanica Wangenh. Beytr. Nordam. Holz. 113. 1787. 
Rosa caroliniana Michx. Fl. Am. Bor. 1: 295. 1803. 
Rosa pratensis Raf. Ann. Gén. Sci. Phys. 5: 215. 1820. 
Rosa lucida a T.& G. Fl. N. Am. 1: 458. 1840. 
Rosa parviflora vulgaris Crépin, Bull. Soc. Bot. Belg. 15: 68. 1876. 
Rosa humilis parviflora Koehne, Deuts. Dendr. 293. 1893. 
Rosa virginiana humilis C. K. Schneid. Handb. Laubh. 1: 570. 1906. 
Stems low, slender, 3-10 dm. high, terete, glabrous, usually very bristly when young and 
armed with slender, straight, paired, terete, infrastipular prickles 5-8 (rarely 10) mm. long; 
branches usually not bristly, either with infrastipular prickles or sometimes unarmed; stipules 
adnate, usually very narrow, 1-15 cm. long, glabrous or slightly pubescent, rarely with a few 
glandular teeth, the free portion lanceolate, acuminate, about 5 mm. long; petioles and rachis 
sparingly pubescent or glabrous, rarely with a few prickles; leaflets usually 5, rarely 7, elliptic 
or lance-elliptic, rarely oval or oblanceolate, 1-3 cm. long, glabrous but not very shining above, 
usually somewhat paler and pubescent on the veins or glabrate beneath, sharply and regularly 
serrate with ascending teeth, usually acute at both ends or obtuse at the apex, short-petiolulate; 
flowers usually solitary; pedicels 1-3 cm. long, glandular-hispid; hypanthium globose or a 
little depressed, glandular-hispid, in fruit about 8 mm. broad; sepals lanceolate, caudate- 
acuminate, 1.5—2 cm. long, usually very glandular on the back, tomentose within, all or at 
least the outer ones with linear or subulate lobes, reflexed after anthesis and soon deciduous; 
petals rose-colored, 2—2.5 cm. long; styles distinct, persistent, not exserted; achenes attached 
mainly on the bottom of the hypanthium. 
TYPE LOCALITY: Carolina. 
