KEY TO THE FAMILIES OF FLOWEEING PLANTS 

 DESCRIBED IN THIS FLORA 



CLASS I 



GYUNOSPERMS. Ovules not Inclosed in an ovary. 



Trees or shrubs. Leaves usually evergreen and needle-shaped, awl-shaped, 

 or scale-like. Flowers moncecious or dioecious. Fruit », 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 chafty bracts. family Pxr 



Flowers 2-bracted. Leaves 2-ranked. Stem cylin- 

 drical 4. Grass .... 22 



Flowers 1-bracted. Leaves 3-ranked. Stem trian- 

 gular 5. Sedge .... 23 



(2) Flowers on a spadix. 



Spadix slender, hairy, and bristly 2. Cat-Tall ... 20 



Spadix fleshy 6. Arum > ... 24 



(3) Flowers not on a spadix. 



(a) Carpels usually numerous and nearly or entirely 



separate 3. Water Plantain . 21 



(6) Carpels united. 



* Perianth hypogynous or nearly so. 



t Perianth actinomorphic, its parts similar, green, 



or chaffy 9. Rush .... 30 



1 1 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 



5 



