ORDER CXVI. JUGLANDACEiE. 513 



1-celled, with an erect solitary ovule. Sli/lci 1 — 2, short, or 

 wanting. Stigmas 2, lacerated or discoid, 4-iobed. Fruit 1- 

 celled, with 4 imperfect partitions. Seed 4-lobed. Trees, with 

 alternate, unequally pinnate I'^aves. 



Gexus L— JUQ'LANS. L. 19—12. 

 [Jovia glans, the nut of Jove.) 



Monoecious. Sterile florets; scales usually o-parted, imbri- 

 cate ; perianth 5 — 6-parted. Stamens numerous. Fertile flo- 

 rets ; perianth double, each 4-parted. Drupe large, with the 

 nut irregularly furrowed. 



1. J. ni'gka, (L.) a large tree. Leaflets ovate-lanceolate, numer- 

 ous, serrate, slightly cordate, pubescent beneath when young. Fruit 

 spht-rical, scabrous, the pulp decaying and turning black. — 'h . April. 

 Rich soils. 30—60 feet. Black walnut. 



2. J. cin'erea, (L.) a middle-sized tree. Leaflets numerous, lance- 

 olate, pubescent, on villous petioles. Fruit oblong-ovate, acuminate, 

 irregularly grooved. — ^ . April. Fertile soils. 30 — 50 feet. 



Butternut. 



Genus IL— CARY'A. Nutt. 19—12. 

 (From caryon, a nut) 



Monoecious. Sterile florets ; ament imbricate ; scales 3- 

 parted : perianth none. Stamens 4 — 6. Fertile florets ; peri- 

 anth 4-cleft, superior. Style none. Stigma 4-lobed. Pericarp 

 4-valved. Nut quadrangular, smooth. 



1. C. sulca'ta, (Willd.) A large tree. Leaves pinnate ; leaflets obo- 

 vate, lanceolate, serrate, pubescent beneath, 7 — 9. Sterile anients 

 pendulous, 3-parted ; fertile florets terminal. Nut covered with a thick 

 pericarp. — ^. April. Fertile soils. 60 — SO feet. 



Thick Shell-hark Hickory. 



2. C. al'ba, (L.) a large tree, with the bark separating in flat scal.-s. 

 Leaves YxnuAie ; leaflets large, oblong-lanceulate, serrate. Xnt nearly 

 spherical, wuth the pericarp thin. — ^. April. Fertile soils. 40 — CO 

 feet. Shag bark Jlickori/. 



3. C. TOMENTo'sA, (Mich.) A large tree. Leaves pinnate : k-afl.'ts ob- 

 ovate-laneeolate, acuminate, slightly serrate, pubescent beneath, 7—9. 

 Ament tomi-ntose, very long. Fruit sub-globose, smooth, with a thick 

 j.ericarp. Nut somewhat 6 angled, with a thick, hard shell. — ^ . April 

 —May. Fertile soils. 40—60 feet. 



Common Ilickori/. Mliite heart Hickorp. 



4. C. ama'ra, (Mich.) A large tree. Xcaye* pinnate ; lenflfts sessile, 

 ovate-oblong, sharply serrate, acuminate, glabrous, except the veins 

 and midrib, i^ru/i small, bitter, and astringent.— '^ . May. Fertile 

 woods. 40 — 50 feet. Bitter-nut. 



Var. C. roRci'.xA, (Mich.) A large tree. Leaves pinnate ; leafletJ* lance- 

 olate, 7 — 9, glab.ous. Fruit small, with a hard, smooth nut, very bitter. 

 — T^. April. Margins of swamps. 70— 80 feet. Pig-nut Hickoiy 



22* 



