484 NORTH AMERICAN FLORA 
II. INDICAE 
One species. 
III. LAEVIGATAE 
One species. 
IV. BRACTEATAE 
One species. 
V. GALLICAE 
One species. 
VI. CANINAE 
Leaflets glandular-pruinose beneath, distinctly double-serrate with gland- 
tipped teeth. 
Prickles straight or nearly so. 
Prickles strongly curved. 
Leaflets suborbicular or broadly oval, mostly rounded at the apex; 
hypanthium in fruit obovoid or broadly ellipsoid, abruptly con- 
tracted at the apex; sepals tardily deciduous or more or less per- 
sistent; styles pubescent. 
Leaflets ovate or oval, acute or short-acuminate; hypanthium in 
fruit narrowly elliptic, tapering at both ends; sepals rather early 
deciduous; styles glabrous or nearly so. 
Leaflets not glandular beneath, except sometimes on the midrib; teeth 
only occasionally double. 
Leaves pubescent, at least beneath and on the rachis. 
Leaves glabrous on both sides, shining above. 
Stem strongly prickly; prickles on the stem stout, usually more 
than 5 mm. long. 
Stem unarmed or nearly so, or with a few small prickles, 4 mm. 
long or less. 
VII. CAROLINAE 
Hypanthium and pedicels glandular-hispid. 
Leaflets not subcoriaceous. 
Hypanthium globose or short-ellipsoid, rounded or barely acute at 
the base. 
Infrastipular prickles decidedly curved. 
Leaflets finely serrulate, elliptic or oblanceolate; prickles 
short and stout. 
Leaflets mostly 7; flowers usually corymbose on erect 
branches; fruit about 12 mm. thick; northern plant. 
Leaflets mostly 5; flowers usually solitary or two together 
on spreading branches; fruit 8-9 mm. thick. 
Fruit depressed-globose, rounded at the base. 
Fruit ellipsoid, acute at the base. 
Leaflets coarsely serrate, oval or obovate. 
Leaflets not shining; prickles short and weak. 
Leaflets obovate; fruit 10-12 mm. in diameter. 
Leaflets oblanceolate; fruit 7-10 mm. in diameter. 
Leaflets shining; prickles long and stout. 
Infrastipular prickles straight or slightly curved. 
Leaflets oval or obovate or broadly lance-elliptic, 5—7 (in R. 
virginiana rarely 9). 
Leaflets crenate, rounded at the apex; flowers corym- 
bose; plant practically unarmed. 
Leaflets serrate, acute or acuminate. 
Leaves decidedly pubescent beneath. 
Leaves glabrous or pubescent only on the veins 
beneath. 
Leaflets shining above; flowers usually corymbose; 
prickles as a rule stout and flattened at the base. 
Leaflets not shining above; flowers usually solitary, 
rarely a few together; prickles slender, terete. 
Leaflets not glandular-dentate. 
Plant low, usually less than 2 dm. high; 
leaflets less than 2 cm. long, dark-green; 
prickles 3-5 mm. long, stout, often 
curved. 
Plant usually more than 2 dm. high; leaflets 
usually more than 2 cm. long; prickles 
more than 5 mm. long, slender. 
Leaflets broadly oval. 
Leaflets elliptic or narrowly oval. 
Leaflets glandular-dentate and usually glandu- 
lar on the rachis. 
Branches not bristly or rarely slightly so; 
teeth of the leaflets ovate. 
Branches densely bristly; teeth of the leaf- 
lets lanceolate. 
10. 
ie 
12. 
13. 
14. 
15! 
Phe 
23% 
Tipe: 
20. 
24. 
2D: 
26. 
QT 
oOo e al mer) 
xa 7 WR PB 
wr 
aw 
[VoLUME 22 
. indica. 
. laevigata. 
. bracteata. 
. gallica. 
. tomentosa. 
. rubiginosa. 
. micrantha. 
. dumetorum, 
. canina. 
. Montezumae. 
. palustris. 
. floridana. 
. dasistema. 
. gemella. 
. nanella. 
. virginiana. 
. obtusiuscula. 
. Lyoni. 
. virginiana. 
_ nanella. 
. obovata. 
. carolina. 
. serrulata. 
. subserrulata. 
