KEY TO THE FAMILIES OF FLOWERING PLANTS 
DESCRIBED IN THIS FLORA 
CLASS I 
GYMNOSPERMS. Ovules not inclosed in an ovary. 
Trees or shrubs, Leaves usually evergreen and needle-shaped, awl-shaped, 
or scale-like. Flowers monecious or diecious. Fruit a scaly cone, or 
sometimes appearing berry-like. 1. Pine Family, page 13 
CLASS II 
ANGIOSPERMS. Ovules inclosed in an ovary. 
SUBCLASS I. — MONOCOTYLEDONS. Flowers usually with their 
parts in threes, never in fives. Leaves usually parallel-veined. Cotyledon 1. 
(1) Flowers inclosed by chaffy bracts. 
Flowers 2-bracted. Leaves 2-ranked. Stem cylin- 
cbt) en a a oe . . . 4 Grass... . 22 
Flowers 1-bracted, Leaves 3-ranked. Stem trian- 
gular . UA ntti: hy tthe a re . 5. Sedge. . . . 28 
FAMILY PAGE 
(2) Flowers on a spadix. 
Spadix slender, hairy,and bristly . . . . . 2. Cat-Tail . . . 20 
Spadiz fleshy . . « « . = @ » » « » 6.ATUM. . « « 24 
(8) Flowers not on a spadix. 
(a) Carpels usually numerous and nearly or entirely 
separate. . . . . . .. . . . . 8 Water Plantain. 21 
(b) Carpels united. 
* Perianth hypogynous or nearly so. 
+ Perianth actinomorphic, its parts similar, green, 
or-thaffyy 24.5 6 ow & «= ww on 8. Rush sy 2 « 2-80 
++ Perianth of 2 sets, one sepal-like, the other petal- 
like. 
Style and stigma 1. Petals 3 or 2, soon disap- 
pearing . . . . =... . . « « 7. Spiderwort . . 26 
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