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 diccious. 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. 
FAMILY PAGE 
Flowers 2-bracted. Leaves 2-ranked. Stem cylin- 
Aticali. 20 Gee Ge a dee es er tes ee ee A GTASSY ec 22 
Flowers 1-bracted. Leaves 3-ranked. Stem trian- 
gular. . . 2. . . ... . . . . 5& Sedge. . . . 28 
(2) Flowers on a spadix. 
- Spadix slender, hairy, and bristly . . . . . 2. Cat-Tail . . . 20 
Spadix fleshy . . . . . . .. . . +. 6& Arum... . 24 
(3) Flowers not on a spadix.. 
(a) Carpels usually numerous and nearly or entirely 
separate. . . . . . . . . . . . 8 Water Plantain. 21 
(5) Carpels united. 
* Perianth hypogynous or nearly so. 
+ Perianth actinomorphic, its parts similar, green, 
orchaify . . .. . . . . . . 9 Rush... . 80 
+t 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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