486 NORTH AMERICAN FLORA 
Leaflets densely pubescent, but rarely and slightly if 
at all glandular beneath, mostly elliptic, simple- 
toothed. 
Hypanthium subglobose, almost without neck. 
Hypanthium in fruit about 1.5 cm. in diameter; leaflets glan- 
dular-granuliferous as well as puberulent beneath. 
Hypanthium in fruit about 1 cm. in diameter; leaflets mostly 
obtuse, villous beneath. 
Leaflets thick, strongly reticulate, rugose; branches, and even 
prickles and bristles pubescent. 
Stems unarmed or when young slightly covered with more or less 
deciduous bristles; flowers solitary or corymbose. 
Sepals erect or connivent in fruit. 
Leaves glabrous on both sides, shining. 
Leaves decidedly pubescent beneath, dull. 
Leaflets serrate. 
Fruit globose, about 12 mm. in diameter. 
Leaflets dark-green above, pale and finely pubescent 
beneath. 
Leaflets light-green on both sides, finely puberulent 
beneath. 
Fruit ellipsoid, about 10 mm. in diameter. 
Leaflets crenate; fruit subglobose, 8-10 mm. in diameter. 
Sepals reflexed or spreading in fruit. 
Leaflets decidedly puberulent or short-pilose; sepals 9-15 mm. 
long; petals 1.7—2 cm. long. 
Leaflets glabrous or nearly so; sepals 2-5 cm. long; petals 2.5-3.5 
em. long. 
Infrastipular prickles usually present 
Flowers mostly solitary; petals usually 2.5 em. long or more; hypanthium 
in fruit 12—20 mm. thick. 
Prickles straight or nearly so. 
Hypanthium densely prickly. 
Hypanthium not prickly or rarely slightly so. 
Leaflets more or less doubly-toothed, more or less glandular- 
granuliferous beneath; stipules and rachis glandular. 
Pedicels and calyx densely bristly, but hypanthium glabrous; 
leaflets oval, rarely 2 cm. long; prickles weak; petals 15 
mm. long. 
Pedicels and calyx not bristly, sometimes sparingly glandu- 
lar-hispid. 
Prickles stout, more or less flattened below, ascending; 
petioles, rachis, and lower surface of the leaflets not 
pilose, except sometimes on the veins 
Leaflets very thin, pale and slightly glandular-puberu- 
lent but not muriculate beneath. 
Leaflets thicker, dark-green on both sides, conspicu- 
ously glandular-muriculate beneath; flowers often 
corymbose. 
Prickles weak, almost terete; petioles, rachis, and lower 
surface of the leaflets distinctly pilose. 
Leaflets simple-toothed, puberulent beneath but not glandular- 
granuliferous or glandular-muricate; rachis rarely glandu- 
lar. 
Leaflets finely puberulent beneath. 
Leaflets densely pilose beneath. 
Prickles more or less distinctly curved. 
Hypanthium prickly. 
Sab stout, 1 m. high or more; leaflets usually more than 3 cm. 
ong. 
Stem low, usually less than 3 dm. high; leaflets usually not more 
than 2 cm. long. 
Hypanthium glabrous or merely glandular. 
Prickles very large and flat; twigs densely glandular and pubes- 
cent. 
Prickles short, not conspicuously flattened; twigs not conspicu- 
ously glandular, mostly glabrous. 
Leaves perfectly glabrous or merely glandular-granuliferous 
beneath. 
Stem 1 m. high or more; leaflets mostly more than 2 cm. 
long, pale or light-green, rather firm, rarely double- 
serrate, not glandular-granuliferous beneath; calyx 
not densely glandular. 
Stem usually less than 3 dm. high; leaflets usually less 
than 2 em. long, dark-green, usually glandular-double- 
toothed; calyx usually densely covered with stalked 
glands. q 
Leaves more or less hairy beneath, broadly oval. 
49. 
50. 
pte 
2: 
Io. 
54. 
101. 
11S: 
D0: 
56. 
57. 
58. 
Bie); 
60. 
61. 
62. 
63. 
98. 
64. 
67. 
65. 
66. 
67. 
[VoLUME 22 
. acicularis. 
. Bourgeauiana. 
. acicularioides. 
. rugosa. 
. subblanda. 
. blanda. 
. salictorum. 
. Pringlei. 
. anacantha. 
Williamsii. 
. johannensis. 
. MacDougali. 
. yainacensis. 
. nutkana. 
. muriculata. 
. Brownii. 
. Spaldingii. 
. Davyi. 
. Underwoodii. 
. aciculata. 
. Durandii. 
. melina. 
. aciculata. 
