26 American Midland Naturalist Monograph No. 4 



Leaves oblong to reverse-lance-shaped, with aromatic odor 



.MYRICA, p. 66. 



Leaves egg-shaped lo roundish or reverse egg-shaped, without aromatic 



odor Betulaceae, p. 55. 



Seed-bearing flowers not in catkins. 



Fruits hard-shelled nuts surrounded by tube-like involucre or small nutlets 



enclosed in bladdery sacs Betulaceae, p. 55. 



Fruits acorns or small nutlets enclosed m chestnut-like burs -...Fagaceae, p. 61. 

 Flowers mostly of one kind, not borne in catkins. 



Flowers inconspicuous, the petals tiny or lackmg. 

 Fruits dry capsules or seed-like achenes. 



Calyx not tube-like; fruits capsules or the achenes surrounded by 

 enlarged sepals or bracts. 

 Leaves mostly somewhat fleshy, often scurfy; fruits seed-like 

 achenes surrounded by enlarged, variously modified 

 bracts or sepals Chenopodiaceae, p. 75. 



Leaves not fleshy, sometimes thickish; fruits 3- or 5-lobed 

 capsules. 



Plants 2 to 4 feet high; leaves up to l'/2 inches long; cap- 

 sules 3-lobed, not glandular BERNARdia, p. 150 



Plants Yl 'o ' fo°' high; leaves up to Yl inch long; cap- 

 sules 5-lobed, dark-glandular AYENIA, p. 173. 



Calyx tubular; fruits seed-like achenes tipped by long feathery tails 



...CERCOCARPUS, p. 137. 



Fruits fleshy, berry-like. 



Herbage conspicuously silvery ELEAGNUS, p. 176. 



Herbage green. 



Leaves egg-shaped, 1 -sided at the base; fruits becoming brownish- 

 orange; mostly trees CELTIS, p. 67. 



Leaves oblong to egg-shaped; berries black or red 



RHAMNUS, p. 161 . 



Flowers showy. 



Corollas of distinct petals. 



Flowers irregular or the petals 4; fruits long 2-valved pods. 



Tall deciduous shrubs; flowers red, somewhat pea-like, appearing 

 before the leaves; leaves round, heart-shaped at the 

 base; pods strongly flattened CERCIS, p. 144. 



Bushy evergreen shrubs 2 to 4 feet high; flowers yellow, regular, 

 the petals 4; leaves oblong to linear-lance-shaped; pods 

 not flattened DENDROMECON, p. 80. 



Flowers regular, the petals 5, white, pink, blue, or reddish; fruits 

 various, if capsules, not linear. 



Fruits many-seeded capsules; flowers white or copper-red 



Ericaceae, p. 1 80. 



Fruits various, if capsules, 1 -seeded or the cells I -seeded. 



Flowers white or pink, the petals plane; fruits small cherries, 



apples, berries, or tiny 1 -seeded pods 



ROSACEAE, p. 98. 



Flowers white or blue, the petals cupped; fruits 3-lobed, 



clove-like capsules CEANOTHUS, p. 165. 



Corollas or corolla-like calyx bell-shaped or tubular. 



Flowers not borne in heads surrounded by involucral bracts. 



