56 TREES OF THE NORTHERN UNITED STATES 
c. Fruit large, orange-like in size and color when ripe; juice 
MIUKY sicarcencse eas anes ee Per rrr 77. Maclura. 
c. Fruit small, black when ripe, cherry-like; juice milky ...... 
SpainonsimeanintyR anit Rec tN Stak Gel lab aaa a AO Se ed 54. Bumelia. 
d, Aromatic; berries dark blue on red stalks.......... 68. Persea. 
d. Not aromatic; leaves nearly 1 ft. long; flowers large and soli- 
LEY is cd stecencavlayartinn Nada one Sanat BRO ate literally NO wiv «1. Magnolia. 
d. Not aromatic; leaves 1-4 in. long; flowers very small; fruit 
small dark-colored berries, with 2-4 seeds....... 20. Rhamnus. 
d. Not aromatic; flowers large, in showy ciusters. (e.) 
e. Leaves 5 in. or more long................ .52. Rhododendron. 
e. Leaves less than 4 in. long...... Satie sub laltersstua wiayartes 51. Kalmia. 
f. Leaves decidedly aromatic, usually somewhat irregularly lobed, 
margin entire, base tapering..................5. 69. Sassafras. 
f, Leaves usually deltoid, sometimes heart-shaped with serrate 
margin and gummy buds, rarely palmately lobed. All have 
either the petiole flattened sidewise, the leaf-blade densely 
silvery-white beneath, or gummy aromatic buds... .92. Populus. 
f. Leaves broadly heart-shaped; margin entire; small tree with 
abundance of red flowers in early spring; fruit a pea-like pod 
S4SsneGeusseoosey Wienats BPR EE Fey os RESTOR A eves Bos, WOONCIRS 
f. Leaves not as above given. (g.) 
g. Leaves broadly heart-shaped, with a serrate margin and a 
petiole about as long as the blade, sometimes longer; base 
of leaf not oblique..................0000- sapastte 4. Idesia. 
g. Leaves broadly heart-shaped, those on the suckers much 
lobed; base not oblique; margin serrate; juice milky; bark 
very tough. (1.) 
g. Leaves broadly heart-shaped, with an oblique base; margin 
regularly serrate ; juice not milky..... Seee eRe es ll. Tilia. 
g. Leaves slightly if at all heart-shaped at base, usually some- 
what oblique, with neither milky juice nor lobes. (j.) 
g. Leaves decidedly and quite regularly lobed. (h.) 
h. Leaves with 3-5 large lobes, the margin entire or slightly an- 
GUated i iat carey gnkow, Nea geieseeyarecee es 10. Sterculia. 
h. Leaves star-shaped, with 6- -9 pointed, serrate lobes. (i.) 
h, Leaves large, irregularly margined; leaf-stem covering the 
bud $ laree trees oo ccp eee vee sein geraences 80. Platanus. 
h, Plant quite thorny; fruit berry-like, ending in a conspicuous 
spreading calyx; small trees or shrubs with apple-like blos- 
BONS scuocmerinsineense Panes ogee Mieke eA vapaintaS 38. Crategus. 
h, Leaves with uw tapering base; seaaill tree, almost a shrub, 
with large Hollyhock-like ower ; plant not thorny ....... 
sarge eS deietace bene bbe eeet ceeeeererssecenetss@iesss D Hibisous 
