6 FOUNDATIONS OF BOTANY 



Styles or stigmas 3, separate. Petals 3, lasting family page 

 several days. Leaves iietted-veined .... K). (Trillium) Lily . 29 

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

 Corolla irregular. Aquatic herbs with par- 

 allel-veined leaves 8. Pickerel-weed . 28 



Perianth regular, its divisions all alike, or nearly 



so, petal-like 10. Lily 29 



I'erianth adnate to the ovary. 



Anthers 6 11. Amaryllis. . . 42 



Anthers 3 12. Iris 45 



Anthers 1 or 'i 13. Orchis .... 40 



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

 fives 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 dioecious, one or both sorts in 

 catkins. 

 Staminate flowers in catkins, the pistillate ones soli- 

 tary or clustered. 



Leaves pinnately compound 16. Walnut .... 49 



Leaves simple • ■ • • 18. Beech .... 55 



Both kinds of flowers in catkins. 

 Leaves alternate. 

 Ovaries in fruit becoming fleshy and combining 



into an aggregate fruit 20. Mulberry ... 61 



Fruit 1-seeded, a stone-fruit or minute nut. Aro- 

 matic shrubs 15. Bayberry ... 49 



Fruit a capsule, seeds with .silky hairs .... 14. Wlllow .... 47 

 Fruit a minute nut or fikene. Mostly large shrubs 



or trees, not very aromatic 17, Birch 51 



Leaves opposite, small parasitic shrubs .... 22. Mistletoe ... 63 



B. 



Flowers not in catkins, both calyx and corolla wanting 44. Sycamore . . . 105 



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

 corolla is considered to be missing. 



