6 KEY AND FLORA 



styles or stigmas 3, separate. Petals 3, lasting Family Page 



several days. Leaves netted-veined . . 10. {Trillium) Jjily . 30 

 Style 1, stigma 3-lobed or 6-tootlied. 

 Corolla not actinomorphic. Aquatic herbs 



with parallel-veined leaves 8. Pickerel Weed . 28 



1 1 1 Perianth actinomorphic, its divisions all alike 



or nearly so, petal-like 10. Lily .... 30 



** Perianth not hypogynous. 



Anthers 6 11. Amaryllis . . 43 



Anthers 3 12. Iris .... 45 



Anthers 1 or 2 13. Orchis ... 47 



SUBCLASS II. — DICOTYLEDONS. Flowers usually with their parts in 

 lives or fours. Leaves netted-veined. Cotyledons 2. 



I. Apetalous Division. Flowers without a corolla or without either calyx or 

 corolla.i 



A 



Flowers monoecious or dicecious, one or both 

 sorts in catkins. 



(1) Staniinate flowers in catkins, the pistillate ones 



solitary or clustered. 



Leaves pinnately compound 16. \Yalnut ... 52 



Leaves simple 18. Beech .... 58 



(2) Both kinds of flowers in catkins, 

 (a) Leaves alternate. 



Ovaries in fruit becoming fleshy and com- 

 bining into an aggregate fruit . . .20. Mulberry . . 64 



Fruit 1-seeded, a drupe or minute nut. 

 Aromatic shrubs 15. Bay berry . . 51 



Fruit a capsule, seeds with silky hairs . . 14. Willow ... 48 



Fruit a minute nut or akene. Mostly large 

 shrubs or trees, not very aromatic . . 17. Birch .... 54 

 (6) Leaves opposite, small parasitic shrubs . . 23. Mistletoe ... 68 



6 



Flowers not in catkins, both calyx and co- 

 rolla wanting 45. Sycamore . . 113 



1 When only one floral envelope is present, this is said to be the calyx and 

 the corolla is considered to he missing. 



