FLORA OF THE DISTRICT OF COLUMBIA. 25 



CC. LEAVES TOOTHED OR LOBED. 



Plants climbing. 

 Leaves peltate, the petiole attached on the under side near the base; fruit juicy, 

 1-seeded. Tendrils none; leaf blades about as broad as long. 



MENISPERMACEAE (p. 161). 

 Leaves not peltate; fruit with more than 1 seed. 



Blades of the leaves acute or tapering at the base, not lobed; tendrils none; fruit 



a dehiscent capsule Celastrus (p. 199). 



Blades of the leaves cordate or truncate at the base, usually lobed; plants with 



tendrils; fruit a juicy berry VITACEAE (p. 201). 



Plants not climbing. 



Fruit an acorn. Trees; staminate flowers in catkins Quercus (p. 138). 



Fruit not an acrrn. 



Leaves with 2 acute lobes at the apex and with a lobe on each side near the base, 

 not toothed, glabrous. Fruit conelike; flowers very large, yellow. 



Llrlodendron (p. 161). 

 Leaves not 2-lobed at the apex, although often lobed in other ways d, dd. 



D. BLADES OF THE LEAVES, AT LEAST SOME OF THEM, LOBED. 



Branches with sharp winglike corky ridges. Flowers and fruits sessile in globose 



heads; leaves glabrous, deeply lobed, the lobes acute Liquidambar (p. 173). 



Branches not with winglike corky ridges. 

 Leaves usually 3-lobed, not at all toothed. Trees or shrubs with aromatic leaves; 

 fruit a blue fleshy drupe; flowers greenish yellow, appearing with the leaves. 



Sassafras (p. 162). 

 Leaves toothed as well as lobed. 



Blades of the leaves as long as broad or longer, pinnately many-lobed; fruit a 

 small nut coated with resinous grains. Shrubs with aromatic leaves and large 



stipules Comptonia (p. 135). 



Blades of the leaves less than twice as long as broad, not pinnately many-lobed; 

 fruit not a small nut with resinous grains. 

 Flowers sessile in very dense spheric heads. 



Leaves longer than broad, usually with 3 broad lobes; bark not peeling off 



in plates Papyrius (p. 141). 



Leaves as broad as long, with more than 3 very acute lobes; bark peeling off 



in plates Platanus (p. 173). 



Flowers not in heads. 



Flowers in catkins. Fruit a capsule, a nut, or a fleshy mutiple fruit. 

 Plants shrubs; fruit a nut; leaves very shallowly lobed. . .Corylus (p. 137). 

 Plants trees; fruit not a nut; leaves deeply lobed. 



Fruit a capsule, the seeds hairy; leaves not rough-hairy. 



Populus (p. 134). 

 Fruit a juicy multiple fruit, the seeds not hairy; leaves rough-hairy. 



MORACEAE (p. 141). 

 Flowers never in catkins. 

 Bark peeling off in shreds; fruit of 2 dry follicles. Flowers white; shrubs. 



Opulaster (p. 173). 

 Bark not peeling off in shreds; fruit a capsule or juicy. 

 Corolla large, 5-10 cm. broad; fruit a capsule. Leaves glabrous; shrubs. 



Hibiscus (p. 203). 

 Corolla smaller, less than 4 cm. broad; fruit juicy. 



Plants shrubs; flowers in racem^es; fruit a spheric berry. 



Ribes (p. 172). 

 Plants trees; flowers in corymbs; fruit a pome Malus (p. 177). 



