ILLINOIS NATURAL HISTORY SURVEY MANUAL 1 



KEY TO FAMILIES — COXCl'd 



Corolla tube split down one side. . ..LOBELIA FAMILY p. 330 

 Not thus 74 



Leaves alternate BLUEBELL FAMILY p. 328 



Leaves opposite 75 



Corolla 4-lobed MADDER FAMILY p. 318 



Corolla 5-lobed HONEYSUCKLE FAMILY in part p. 321 



Flowers with a colored perianth 81 



Not thus .- • • 77 



Flowers on a spadix, usually within a spathe 



ARUM FAMILY, p. 40 



Not thus 78 



78. Flowers enclosed by dry husks (scales) 79 



Flowers not so enclosed; crowded in a spike 



CATTAIL FAMILY p. 35 



79. Stems round or flattened, not 3-sided 80 



Stems usually 3-sided SEDGE FAMILY p. 39 



80. Stems solid; each flower on a short stalk of its own, with 



6 scales .RUSH FAMILY p. 47 



Stems hollow except at nodes; flowers in chaffy clusters, 



number of scales not readily determinable 



GRASS FAMILY p. 3S 



81. Pistil 1 82 



Pistils numerous WATER PLANTAIN FAMILY p. 36 



82. Calyx attached below the ovary 83 



Calyx attached above the ovary 86 



83. Sepals green 84 



Sepals and petals colored alike 85 



84. Leaves of the stem in whorls of 3 



LILY FAMILY in part p. 48 



Not thus SPIDERWORT FAMILY p. 44 



85. Flowers regular LILY FAMILY in part p. 48 



Flowers irregular PICKERELWEED FAMILY p. 46 



86. Flowers regular 87 



Flowers irregular ORCHIS FAMILY p. 67 



87. Stamens 3 IRIS FAMILY p. 6s 



Stamens 6 AMARYLLIS FAMILY p. 64 



The wind flower and the violet, they perished 



long ago, 

 And the brier rose and the orchis died amid the 



summer glow; 

 But on the hill the goldenrod, and the aster in 



the wood. 

 And the yellow sunflower by the brook in autumn 



beauty stood. 

 T/ie Death of the Flowers — William Cullex Bryaxt 



34 



