318 DICOTYLEDONOUS. ^ 



6 -cleft. Stamens 5-12. Fertile florets 2, within a 4-lobed 

 prickly involucre. Perianth with 4-6 minute lobes. Ormries 

 S-celled, 2 of them abortive. Styles 3. Nut l-seeded, en- 

 closed by the involucre. 



1 F Sylvatica. a large tree- Leaves ovate, acuminate, ciliate, slightly 

 toothed, on short petioles. Involucre persistent. Seed triquetrous. Beach. 

 ^2 March — April. Damp rich soils. 50-60 ft. 



Order CXLII. JUGLANDE^. 



Flowers iLoncEcious. Sterile florets in an ament. Peri- 

 anth oblique, membranous, scaly, irregularly lobed. Stamens 

 3-36, inserted on the receptacle. Filaments short. Anthers 

 2-celled. Fertile florets with the perianth 4-6.parted. Ova- 

 ry 1 -celled, with an erect solitary ovule. Styles 1-2, short, 

 or wanting. Stigmas 2, and lacerated, or discoid, and 4-lob- 

 ed. Fruit 1 -celled, with 4 imperfect partitions. Seed 4-Io- 

 bed. Trees, with alternate, unequally pinnate leaves. 



Gejtos J. JUGLANS. ' 



Moncecious. Sterile florets. Scales usually 5-parted, im- 

 bricate. Perianth 5-6. parted. Stamens numerous. Fertile 

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

 the nut irreojularlv furrowed. 



1 J Nigra. A large tree. Leaflets ovate-lanceoate, numerous, serrate, 

 slightly cordate, pubescent beneath when young. Fruit spherical, scabrous, 

 the pulp decaying and turnins: black. Walnut. 



Vi April. Rich soils. 30-60 ft. 



2 J CiNEREA. A middle sized tree. Leaflets numerous, lanceolate, pu- 

 bescent, on villous petioles. Fruit oblong-ovate, acuminate, irregularly groo- 

 ved. Butternut. 



ll April. Fertile soils. 30-50 ft. 



Genus II. CARYA. 



Monoecious. Sterile florets ; ament imbricate. Scales S- 

 parted. Perianth none. Stamens 4-6. Fertile florets ; pe- 

 rianth 4-cleft, superior. Style none. Stigma 4-lobed. Peri- 

 carp 4-valved. Nut quadrangular, smooth. 



1 C Sulcata. A large tree. Leaves pinnate Leaflets obovate, lanceo- 

 late, serrate, pubescent beneath, 7-9. Sterile arnents pendulous, 3-parted. 

 Fertile florets terminal. Nut covered with a thick pericarp. 



Thick shell bark Hickory. 

 h April. Fertile soils. 60-80 ft. 



2 G Alba. A large tree, with the baik separating in flat scales. Leaves 

 pinnate ; leaflets large, oblong-lanceolate, serrate. JS^ut nearly spherical, with 

 the pericarp thin. iihag bark hickory. 



ll April. Fertile soils. 40-60 ft. 



3 C ToMENTOSA. A large tree. Z-eat;e.<» pinnate ; leaflets obovate-lance- 

 olate, acuminate, slightly serrate, pubescent btneaih, 7-9. Amtnt tomentose, 



