The Ohio Naturalist. 
[Vol. XII, No. 6, 
5 10 
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DO. 
DO. 
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Fruit obliquely oblong or oval, compressed, gibbous, | in. 
long, reticulate-veined. Cotinus. 
Nut sharply 3-angled; usually 2 together in the 4-valved 
bur. Fagus. 
Nut not 3-angled. 50. 
Nut less than 34 in- long, somewhat compressed. 51. 
Nut large, more than 34 in. long, or if not then circular in 
cross-section. 52. 
Nut with ridges ; fruiting bract 3-cleft and incised. Carpinus. 
Ridges of the nutlet inconspicuous, fruiting bract bladder- 
like. Ostrya. 
Nut with 2 or 3 prominent ridges, sometimes with rough 
wrinkles. 53. 
Nut not with ridges. 54. 
Nut rugose or sculptured; husk indehiscent. Juglans. 
Nut smooth or angled, husk at length splitting into seg- 
ments. Hicoria. 
Nut ovoid-oblong or subglobose; cup with imbriacted, more 
or less united bracts. Quercus. 
Nut plano-convex or rounded; bur globose and very prickly. 
Castanea. 
Seed, which may be mistaken for a nut, not showing a style, 
large and shining; capsule splitting into 3 valves. 
Aesculus. 
-DO- 
Fruit a pome, the carpels enclosed by an adnate, perigvnous 
disk or hypanthium. 56. 
Fruit a berry, or berrv-like, with several seeds. 60. 
Fruit a drupe, or drupe-like, with a stone or pit and with 
1 or rarely 2 seeds. 66. 
Ripe carpels of the pome papery or leathery. 57. 
Ripe carpels bony. Crataegus. 
Pome small and berry-like. 58. 
Pome large, fleshy like the apple. 59. 
Pome scarlet when ripe, cavities not more than 5. Sorbus. 
Pome purplish-red to purplish-blue when ripe, cavities 
usually 10. Amelanchier. 
Seeds not more than 3 in each cavity; pome tapering into the 
peduncle; flesh with grit-cells. Pyrus. 
Seeds not more than 3 in each cavity; pome sunk in at both 
ends, its flesh without grit-cells. Malus. 
Seeds many in each cavity, flesh of pome hard. Cydonia. 
Berry large, very much elongated, green with yellow pulp 
and large brown seeds. Asimina. 
Berry ovoid or globose. 61. 
