PaRT 6, 1918] ROSACEAE 
Leaflets not glandular-granuliferous beneath, mostly 
simple-toothed. 
Leaflets sparingly pubescent beneath. 
Leaflets densely pubescent beneath, elliptic in outline. 
Leaflets more or less glandular-granuliferous beneath. 
Sepals not glandular-hispid; leaflets 2-4 cm. long, not 
conspicuously glandular double-toothed. 
Sepals conspicuously glandular-hispid; leaflets 1—2 cm. 
long, conspicuously glandular double-toothed. 
Flowers mostly corymbose, if solitary the petals 2 cm. long or less; fruit 
rarely more than 1 cm. in diameter. 
Prickles more or less curved. 
Lower surface of the leaves, pedicels, and rachis more or less pubes- 
cent or puberulent or glandular-granuliferous. 
Leaves softly villous or pilose beneath, or in age more glabrate; 
prickles stout, flattened. 
Leaflets conspicuously glandular beneath, more or less double- 
toothed. 
Hypanthium with a distinct neck. 
Leaflets broadly oval or obovate; fruit subglobose or 
broadly obovoid. 
Leaflets elliptic; fruit elongate-ellipsoid. 
Hypanthium depressed-globose without a neck; leaflets 
elliptic or narrowly oval. 
Leaflets not at all glandular beneath, mostly simple toothed; 
hypanthium with a distinct neck, often ovoid. 
Leaves very finely puberulent and glandular-pruinose beneath; 
prickles slender. 
Leaflets with simple teeth, not copiously glandular-pruinose 
beneath. 
Hypanthium ellipsoid; young shoots with rather few 
strong curved prickles. 
Leaflets 3-5 cm. long, lanceolate or oblanceolate, 
acute; flowers mostly corymbose. 
Leaflets 1—3.5 cm. long, obovate to elliptic; flowers 
mostly solitary or 2 or 3 together. 
Hypanthium globose; young shoots with fine, often rather 
numerous prickles. 
Leaflets glaucous beneath, rarely more than 2 cm. 
long; sepals 1-1.5 cm. long. 
Leaflets not glaucous beneath, usually about 3 cm. 
long; sepals 2 cm. lomg or more. 
Leaflets obovate, sharply serrate with lanceolate 
teeth, except the cuneate entire base; stipules 
and rachis copiously glandular-pruinose. 
Leaflets oval with ovate teeth, mostly obtuse at 
the base; stipules and rachis not glandular. 
Leaflets double-toothed with glandular teeth, conspicuously 
glandular-pruinose beneath. 
Leaflets dark-green above, firm, more than 15 mm. long, 
glandular-puberulent; inflorescence corymbose. 
Leaflets broadly oval; fruit broadly ellipsoid or sub- 
globose. 
Leaflets narrowly elliptic; fruit elongate-ellipsoid. 
Leaflets pale-green, less than 15 mm. long, merely glandu- 
lar-pruinose beneath; flowers mostly solitary or few. 
Lower surface of the leaves perfectly glabrous. 
Prickles straight or nearly so. 
Hypanthium globose; neck usually obsolete. 
Hypanthium normally not bristly. 
Sepals lanceolate, with long caudate-attenuate or sometimes 
foliaceous tips, more than | cm. long. 
Stipules, petiole, and rachis copiously glandular; leaflets 
often double-toothed with gland-tipped teeth, more 
or less glandular-granuliferous beneath. 
Leaflets orbicular or rounded-ovate. 
Leaflets thick, puberulent, not at all glandular, 
simple-toothed. 
Leaflets more or less glandular-puberulent as well 
as pubescent, more or less double-toothed 
with gland-tipped teeth. 
Leaflets very thin; prickles slender. 
Leaflets green'on both sides; petals about 
2 cm. long. 
Leaflets pale beneath; petals about 1 cm. 
long. 
Leaflets not very thin, dark-green; prickles 
stout. 
Leaves scarcely pubescent beneath. 
69. 
70. 
M2: 
73. 
74. 
Teds 
76. 
Tile 
78. 
19: 
80. 
81. 
Hs 
82. 
83. 
AR 
mR WA 
an Ww 
487 
. oreophila. 
. Spinosissima. 
. columbiana. 
. myriadenia. 
. Aldersonii. 
. Greenei. 
. brachycarpa. 
. californica. 
. palustriformis. 
. neomexicana. 
. avizonica. 
. adenosepala. 
. puberulenta. 
. delitescens. 
. Greenei. 
- granulifera. 
. manca. 
99. R. rotundata. 
84. R. pinetorum. 
85. R. calvaria. 
