Trees of New York Stale 'Ml 



Bianchlets stout, pitliy, exudiii};^ a milky nr watery juice wlicu bruiscf]. 

 /.caves alternate, (lecifluoiis or i)ersisteiit, cliieily odd-pinnately compound. 

 Floircrs dioecious (<r pcdyjfamous, white or greenish white, borne in more or 

 less eompouJid axillary or terminal i>anicles; calyx generally 5-eleft or parted, 

 persistent; petals 5, spreading, longer than the calyx-lobes; stamens '), alter- 

 nate with the petals, inserted with them under the margin of an annular 

 disk; pistil consisting of a sessile ovary' terminated by 3 terminal styles and 

 stigmas. Fruit a globose, smooth or hairy drupelet, borne chietly in thyrses; 

 flesh thin, often acidulous; pit bony or crustaceous. 



KEY TO THE SPECIES p.^ge 



1. Flowers in terminal thyrsoid panicles; drupelet clothed with acid crimson 



hairs 2 



1. Flowers in loose, slender, axillary panicles; drupelet glabrous, white 



R. Vernix 285 



2. Rachis of the leaf not winged; juice milky 3 



2. Rachis of the leaf winged; juice watery R. copallina 283 



3. Leaf-stalks and branchlets densely velvety-hairy R. typhina 279 



3. Leaf-stalks and branchlets glaucous R. glabra 281 



HOLLY FAMILY. AQUIFOLIACEAE 



Trees and .shrul)s witli terete branchlets, scaly buds, alternate 

 simple leaves, inconspicuous flowers, and a drnpaceons fruit. A 

 family of about one hundred and seventy-five species widely dis- 

 Iributed in the temperate and tropical regions of the world. One 

 genus is represented by arborescent forms in the United States. 



Leaves alternate, deciduous or persiistent, simple, entire, crenate or pun- 

 gently toothed, stipulate. Flowers greenish wMte, dioecious, axillary, soli- 

 tary or cymose; calyx 4-6-lobed ; petals 4-6, imbricated in the bud; stamens 

 4-6_ alternate with the petals, inserted on the petals at the base, reduced to 

 staminodia in the pistillate flower ; ovary 4—8 celled ; style short or none ; 

 stigmas 4-8. Fruit a drupe with thin flesh, containing 4-8 horny or crusta- 

 ceous nutlets; seeds pendulous, albuminous. 



THE HOLLIES. Clenus ILEX L. 



A genus of about one hundred and sixty species of trees and 

 shrubs widely scattered throughout the temperate and tropical 

 regions of the world with the exception of western North America, 

 Australia and neighboring islands. Thirteen species are found in 

 eastern United States, five of which become arborescent. Two of 

 (!je latter are found in New York State, one of which, Her opaca 

 Ait., becomes a small tree within our range. 



For generic characters, see those of the family. 



MAPLE FAMILY. ACERACEAE 

 Trees and a few shrubs with watery often saccharine juice, 

 terete branches, opposite simple palmately lobed or pinnate leaves, 

 and polygamous or dioecious flowers. The Aceraceae consist of 



