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 seale-like. Flowers moneecious or dicecious. 
sometimes appearing berry-like. 
CLASS II 
ANGIOSPERMS. Ovules inclosed in an ovary. 
Fruit a sealy cone, or 
1. Pine Family, page 13 
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- 
drieal. Re de) Hl he a oat 
Flowers 1-bracted. Leaves 3-ranked. Stem trian- 
gular. 
(2) Flowers on a spadix. 
Spadix slender, hairy, and bristly 
Spadix fleshy 
(3) Flowers not on a spadix. 
(a) Carpels usually numerous and nearly or entirely 
separate 
()) Carpels united. 
* Perianth hypogynous or nearly so. 
+ Perianth actinomorphie, its parts similar, green, 
or chatty EOI eae ok ene et ae 
++ Perianth of 2 sets, one sepal-like, the other petal- 
like. 
Style and stigma. Petals 3 or 2, soon disap- 
pearing 
an 
bo 
i) 
-1 
. Sedge 
. Cat-Tail 
. Arum 
Water Plantain . 
Rush 
. Spiderwort 
FAMILY PAGE 
. Grass 22 
