KEY TO THE FAMILIES OF FLOWERING PLANTS 
DESCRIBED IN THIS FLORA 
CLASS I 
GYMNOSPERMS. Ovules not enclosed 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 enclosed in an ovary. 
SUBCLASS I.—MONOCOTYLEDONS. Flowers usually with their parts 
in threes, never in fives. Leaves usually parallel-veined. Cotyledon 1. 
Flowers enclosed by chaffy bracts. FAMILY PAGE 
Flowers 2-bracted. Leaves 2-ranked. Stem cylin- 
EEE re enn RE fy ae ae ee Aa MES colcy vee e aee 
Flowers 1-bracted. Leaves 3-ranked. Stem trian- 
PI ese ae a ag Ea 6 Sb ee, ED Se eae ee 
Flowers on a spadix. 
Spadix slender, hairy, and bristly. ...... ..... 2. Cattal....:. -@ 
CE Sy Se ee eae ee ee eer ae «eat: © 1) 
Flowers not on a spadix. 
Carpels usually numerous and nearly or entirely 
SS Oe ee he ene Sk Ee Ce er 
Carpels united. 
Perianth free or adnate only to the base of the ovary. 
Perianth regular, its parts similar,green,orchaffy 9. Rush... .. . 29 
Perianth of 2 sets, one sepal-like, the other petal- 
like. : 
Style and stigmai1. Petals 3 or 2, soon disap- 
pear ea are OS Oy ees ot Se 
5 
