Par? 6, 1918] ROSACEAE 
Young shoots merely bristly; fruit 
rarely more than | cm. broad. 
Leaflets green on both sides, 2-4 
cm. long. 
Leaflets paler beneath, 1-3 cm. 
long. 
Sepals ovate, less than 1 cm. long, not conspicuously caudate. 
Leaflets. simple-toothed, not at all glandular-puberulent 
beneath. 
Leaflets with glandular, more or less double teeth, gla- 
brous, or slightly glandular-granuliferous beneath. 
Hypanthium densely bristly or prickly. 
Leaflets thin, usually more than 1.5 cm. long, not glaucous; 
sepals more than 1 cm. long. 
Lateral leaflets subsessile; petiolules if any less than 
1 mm. long. 
Leaflets densely glandular-granuliferous beneath; 
teeth usually lanceolate in outline. 
Leaflets sparingly glandular-granuliferous beneath; 
teeth ovate in outline. 
Lateral leaflets orbicular in outline, with distinct petio- 
lules, which are 1-3 mm. long. 
Leaflets firm, glaucous, less than 1.5 cm. long; sepals less 
than | cm. long. 
Hypanthium elongate, with a distinct neck. 
Hypanthium glabrous. 
Leaves finely puberulent beneath. 
Pedicels glandular-hispid; achenes few; leaflets oblan- 
ceolate. 
Pedicels not glandular-hispid; achenes more numerous; 
leaflets oval or obovate. 
Leaflets light-green, coarsely toothed; 
pyriform. 
Leaflets dark-green above, finely toothed; fruit usually 
elliptic. 
Plant unarmed or nearly so; fruit 1 ecm. broad; 
flowers corymbose. 
Plant with slender prickles; fruit 6-8 mm. broad. 
Flowers corymbose; sepals broadly lanceolate. 
Flowers solitary; sepals narrowly lanceolate. 
Leaves glabrous. 
Fruit urn-shaped; leaflets oval. 
Fruit ellipsoid; leaflets obovate. 
Hypanthium pilose when young. 
fruit usually 
(Form of) 
IX. PIMPINELLIFOLIAE 
One species. 
X. MINvUTIFOLIAE 
Leaves 5-7-foliolate; young branches pilose; prickles dull-brown, pubescent. 
Leaves 3-foliolate or on shoots and vigorous branches 5-foliolate; young 
branches stellate or glabrous; prickles g abrous, white. 
Young branches stellate. 
Young branches not stellate, merely bristly and prickly. 
XI. GYMNOCARPAE 
Leaves glabrous beneath. 
Flowers mostly 2-4 together, leafy-bracted; upper stipules broadly 
dilated; leaflets with broadly ovate teeth, indistinctly reticulate 
beneath; fruit 6-8 mm. broad. 
Flowers usually solitary, not leafy-bracted; stipules narrow; leaflets 
with lanceolate or ovate-lanceolate teeth; fruit 6 mm. in diameter 
or less. 
Leaves not very thin, pale and indistinctly reticulate beneath; sepals 
1-1.5 cm. long. 
Leaves very thin, scarcely paler on the lower surface, which is dis- 
tinctly reticulate with semi-pellucid veinlets; sepals less than 
1 cm. long. 
Leaflets 5-7, usually more than 1.5 cm. long; teeth ovate-lanceo- 
late in outline; termina! leaflet usually rounded at the base. 
Leaflets 7-9, usually less than 1.5 cm. long, the terminal one 
usually acute or cuneate at base; teeth lanceolate in outline. 
Leaves pubescent beneath. 
Leaflets oval, doubly glandular-serrate; sepals ovate, about 8 mm. long. 
iets oblanceolate, simply serrate; sepals lanceolate, about 15 mm. 
ong. 
110. 
bt 
ie 
lites 
120% 
114. 
22: 
123. 
124. 
125. 
A ow Aw A 
wa AAA AW DW 
aA 
Ps} eels esl es} 
489 
. pecosensis. 
. Macounit. 
. Covillet. 
. Bolanderi. 
. granulata. 
. Spithamaea. 
. adenocar pa. 
. sonomensis. 
. oligocar pa. 
. pyrifera. 
. Pringlei. 
. Eastwoodiae. 
. Standleyi. 
. Copelandit. 
. Woodsii. 
. pilifera. 
. pimpinellifolia. 
. minutifolia. 
. stellata. 
. mirifica. 
. dasypoda. 
. leucopsis. 
. gymnocar pa. 
. prionota. 
. Bridgesit. 
. oligocarpa. 
