ROSACEAE 527 
sparingly branched, closely armed with straight prickles: leaves 4-11 cm. long; stipules 
relatively broad ; leaflets 5-9, the blades oval or oval-lanceolate, 3-5 em. long, obtuse, 
sharply and doubly serrate, very thin, pale beneath, more or less copiously resinous-pubes- 
cent: flowers normally solitary : sepals lanceolate, acuminate or somewhat dilated above, 
entire or with few teeth: corolla 6-7 cm. broad: fruit about 2 cm. long, elongated, with 
a conie base and manifest neck. 
In open woods, Michigan to South Dakota, Texas and Colorado. Summer. 
4. Rosa Arkansana Porter. A branching shrub 3-6 dm. tall. Stems and branches 
more or less densely armed with bristle-like prickles : leaves 5-10 cm. long, often numer- 
ous ; stipules rather narrow ; leaflets 7-11, the blades oval, obovate or cuneate, 1-2.5 cm. 
long, rounded at the apex, simply serrate, sometimes tomentose beneath: flowers in ter- 
minal corymbs, rarely solitary: hypanthium glaucous: sepals lanceolate, acuminate, glan- 
dular without, tomentose within, spreading or reflexed at maturity, persistent : corolla 4-5 
em. broad : styles distinct : fruit subglobose, red, 10-12 mm. long, glabrous. 
On prairies, Minnesota to Colorado, Missouri, Texas and New Mexico. Spring and summer. 
5. Rosa Woddsii Lindl. A bushy shrub 3-10 dm. tall. Stems with slender, mostly 
straight, prickles, or unarmed above: leaves 3-10 cm. long ; stipules entire, rather broad ; 
leaflets 5-9, the blades oval or obovate, 1-2 cm. long, rather obtuse, simply serrate, cuneate 
or narrowed at the base, somewhat glabrous beneath : sepals erect at maturity: corolla 3-5 
em. broad : fruit globose or ovoid-globose, 8-10 mm. high, glabrous and sometimes glaucous. 
On prairies, Minnesota to the Northwest Territory, Missouri, Texas and New Mexico. Summer. 
6. Rosa lancifdlia Small. A branching shrub 1-2 m. tall. Stems and branches 
terete, armed with short, stout, straight prickles: leaves 5-8 cm. long; leaflets 3-7, the 
blades leathery, lanceolate or oblong-lanceolate, 2-6 cm. long, acute or slightly acuminate, 
finely serrate, glabrous, somewhat lustrous above, the lateral ones sessile : flowers clustered : 
hypanthium somewhat glandular-pubescent: sepals narrowly linear-lanceolate, slightly 
dilated at the apex, often with 1 or 2 lateral teeth : fruit somewhat depressed. 
About cypress swamps, central peninsular Florida. Spring and summer. 
7. Rosa Carolina L. A bushy shrub 1-3 m. tall. Stems and branches armed with 
rather stout recurved prickles : leaves 6-14 cm. long; leaflets 5-9, commonly 7, the blades 
membranous, elliptic to elliptic-obovate or oblanceolate, 2.5-7 cm. long, acute or obtuse at 
the apex, finely serrate, glabrous or pubescent beneath: flowers in terminal corymbs, or 
rarely solitary : hypanthium glandular: sepals lanceolate or linear-lanceolate, acuminate, 
often dilated at the apex, rarely lobed, spreading or reflexed at maturity, deciduous: style 
distinct : fruit subglobose or depressed, 7-9 mm. in diameter, red, more or less glandular. 
In swamps and low situations, Quebec to Minnesota, Florida and Mississippi. Spring and summer. 
8. Rosa foliosa Nutt. A branching shrub, about 1 m. tall. Stems and branches 
armed with straight or slightly curved prickles: leaves 3-7 cm. long; leaflets 7-11, the 
blades firm, usually acute, serrate, glabrous or nearly so: flowers solitary, ora few in cor- 
ymbs: hypanthium hispid: sepals lanceolate, acuminate, glandular-pubescent, often lobed, 
spreading at maturity, deciduous: corolla 3-4 cm. broad : styles distinct: fruit subglobose, 
8-10 mm. in diameter, red, glabrous or nearly so. 
On plains or prairies, Arkansas and the Indian Territory to Texas. Spring and summer. 
,.9. Rosa humilis Marsh. A bushy shrub 2-24 dm. tall. Stems and branches armed 
with straight prickles: leaves 5-15 cm. long; leaflets 5-7, usually 5, the blades rather 
leathery, elliptic, oval or ovate-lanceolate, or sometimes cuneate, 1.5-5 cm. long, acute or 
rarely rounded at the apex, serrate, sometimes pubescent beneath: flowers solitary, or few 
in corymbs: hypanthium more or less densely glandular-pubescent: sepals lanceolate, 
acuminate, dilated or lobed above, spreading deciduous: corolla 4-6 cm. broad : styles 
distinct : fruit subglobose or depressed, 12-15 mm. in diameter, red. 
In dry soil, Ontario to Wisconsin, Georgia and Louisiana. Spring and summer. 
10. Rosa rubigindsa L. A straggling aromatic shrub. Stems and branches often 
wand-like, 1-3 m. long, armed with recurved prickles: leaves 2-8 cm. long; leaflets 5-7, 
the blades elliptic, oval or suborbicular, sometimes varying to ovate or obovate, 1.5-3 cm. 
long, acute or obtuse at both ends, sharply serrate, resinous beneath : flowers solitary, or few 
in corymbs : hypanthium glabrous or bristly : sepals lanceolate, with an acuminate pinnatifid 
apex: corolla white or pink: styles distinct : fruit oval to narrowly ovoid, 1-2 cm. long, 
deep red, shining. 
In waste places, Nova Scotia and Ontario, Georgia and Tennessee. Spring and summer. Natural- 
ized from Europe. SWEETBRIER. 
,,tl Rosa canina L. A straggling shrub. Stems and branches 1-3 m. long, armed 
with slightly curved prickles: leaves 5-8 cm. long ; leaflets 5-7, the blades usually ovate 
or oval, 1-3 em. long, often obtuse at both ends, sometimes acuminate at the apex, serrate, 
glabrous or slightly pubescent beneath : flowers solitary, or a very few in corymbs: sepals 
lanceolate or oblong-lanceolate, acuminate, lobed near the apex, reflexed at maturity, 
