278 
The Ohio Nnturalist. 
[Vol. V, No. 4, 
11. Leaves palrnately veined; shrubs with greens twigs parasitic on 
trees; twigs with self-pruning joints. PHORADEXDROX. 
11. Leaves pinnately veined; plants not parasitic. 12. 
12. Leaves oval, the upper perfoliate, glabrous; twining plants. 
LON ICE R A. 
12. Leaves oblong or oval, coriaceous, not perfoliate; shrubs or trees 
KALMIA 
12. Leaves obovate or orbicular, hairy, crenulate, not perfoliate; stem 
trailing. LINX.EA. 
13. Leaves serrate, serrulate, crenate, or dentate. 14. 
1.3. Leaves entire. 15. 
14. Leaves somewhat hairv; shrubs with thorns or thorn-like spurs. 
COTOXE.ASTER. 
14. Leaves glabrous, very aromatic, oval to obovate, in. long; low 
slender trailing plant. GAULTHERIA. 
14. Leaves glabrous, bitter, white beneath, Y~Yi iii- long; slender 
trailing or ascending plants in bogs. OXYCOCCUS. 
14. Leaves with prominent scurfv scales; erect shrubs without thorns. 
CHAM.EDAPHXE. 
15. Leaves glabrous. 1(1. 
15. Leaves pubescent or woolly at least below. 17. 
IG. Leaves green on both sides, thick, coriaceous, oblong to oblance- 
olate, .5-10 in. long; winter buds very scaly. RHOD(3 dEXDROX 
If). Leaves green on both sides or glaucous beneath, coriaceous, 2-5 in. 
long, oval to oval-lanceolate; winter buds naked; erect shrubs. 
KALMIA. 
16. Leaves white beneath, linear-lanceolate, revolute-margined, acid, 
1-24^ in. long; a bog shrub. ANDROMEDA. 
IG. Leaves white beneath, revolute-margined, bitter. Y~Yi i'l- long; 
slender trailing or ascending plants in bogs. OXYCOCCUS. 
17. Leaves revolute-margined. 18. 
17. Leaves not re volute-margined. 19. 
IS. Leaves with a fragrant odor, densely tomentose beneath; erect 
resinous shrubs. LEDL^M. 
18. Leaves 2-ranked, small, oval or ovate, hairv; creeping shrubs. 
CHIOGEXES. 
19. Leaves lanceolate, mucronate. not evergreen; buds clustered at the 
tip of the twig; trees with 5-angled pith. QUERCUS. 
19. Leaves oval or nearly orbicular, hirsute beneath; twigs hirsute; 
prostrate shrubs. EPIG.EA. 
19. Leaves spatulate, minutely pubescent, with hairs on the margins; 
trailing or spreading shrubs. ARCTOSTAPIIYLOS. 
— 20 — 
20. Climbing monocotyls with scattered vascular bundles, green bark, 
and two tendrils on the persistent petiole base; often pricklv. 
SMI LAX. 
20. Not with scattered vascular bundles but with a ring of wood, true 
bark, and a central pith. 21. 
21. Twigs with thick wart-like dwarf branches; conifers. 22. 
21. Twigs without true dwarf branches. 23. 
22. Young twigs covered with scales. LARIX. 
22. Twigs without scales. GINKGO. 
23. Twigs with numerous small scattered self-pruning scars, without 
apparent leaf scars but with minute dry scale leaves. 24. 
23. Twigs with evident leaf scars and lateral winter buds. 25. 
24. Trees with feather-like dwarf branches, some usually remaining in 
winter; foliage leaves spreading into two ranks; roots often with 
knees; a conifer. TAXODIU5I. 
