ORDER CXV. AMENTACK.E. 511 



Var. (a) Q, fRi'LoBA, (L.). Leaven cunoate, nearly equally 3-lobe(J at 

 the sumaiit, mucronate. 



Var. {h) Q. pagod^fo'lia, (Ell.) Leavca oblitng, in any -lube d, on 

 rather long petioles ; lobes simple, mucronate. 



13. Q. iucifo'lia, (Van.) A small shrub. Leaves cuneate, on long 

 petioles, obovate, 3 — 5-lobe(l, tomentose beneath. Fritit abundant. 

 Acorn ovate, in a shallow cup. — "j . April — iM;iy. Poor soils. 3 — 8 ft. 



c. Fructification annual. Leaven unatvned. 



14. Q. obtusilo'ba, (Mich.) A middle-sized tree, with irregular 

 branche.s. Leaves oblong, sinuate, on short petioles, generally 5-lobed, 

 the upper ones dilated, pubescent beneath. Acor7i oblong, in a hemi- 

 spherical cup. — T^ . April. In stony, clay soils. 30 — 40 feet. 



Post Oak. 



15. Q. lyra'ta, (Walt.) A large tree. Leaves long, irregularly ly- 

 rate, the lobes oblong, nearly acute, the upper ones dilated, glabrous. 

 Acorn nearly globular, almost entirely inclosed in the cup. — t^ . April. 

 In swamps. 60 — 70 feet. Over-cup Oak. 



16. Q. al'ba, (L.) a large tree. Leaves oblong, pinnatitid, sinuate, 

 pubescent beneath, on short petioles. Lobes oblong, obtuse. Fruit 

 large, usually in pairs. Acorn ovate, in a deep cup. — ^ . April 

 Rich soils. 70—80 feet. White Oak. 



17. Q. pri'nus, (L.) a large tree, with a long trunk without branclic-s. 

 Leaves large, obovate, or oblong lanceolate, obtusely toothed, slightly 

 pubescent beneath. Fruit abundant. Acorn large, in a lu-mi.>ph<rioal 

 cup. — ^. April. Common. 70 — 80 feet. ^wampclieUaut Oak. 



18. Q. MicHAUx'ir, (Nutt.) A large tree. Zeaj;<?.<! obovate, unequally 

 toothed, sinuate, obtuse at the base, tomentose beneath. Fruit usually 

 in pairs. Acorn large, ovate. — ^ . April. Rich soils, 60 — 80 feet 



19. Q, monta'na, (Willd.) A large ti-ee. Leaves obovate, acute, to- 

 mentose beneath, coarsely toothed, teeth indurated at the point. Acurn 

 ovate, in a hemispherical cup. — ^. A[)ril. In rocky places near the 

 mountains, 30 — 50 feet. 



20. Q. Casta'nea, (Muhl.) A large tree. Leaves oblong-lanceolate, 

 on long petioles, tomentose beneath, acuminate, coarsely-toothed, teeth 

 with indurated points. Acor^i ovate, in a hemispherical cup. — \' . 

 April — May. In rich, damp soils. 60 — 7 C feet. Chestnut Oak. 



21. Q. chin'quapin, (Mich.) A small shrub, with a smooth, slender 

 stem. Leaves oblong-lanceolate, on short jK^tioles, coarsely toothed, 

 glabrous when mature. Acorn ovate, in a hemispherical cup. — V. 

 April — May, Xear the mountains, 3 — 4 feet. 



Genus XII.— CASTA'NEA 10—12. 

 (Castanea, a town In Thessaly.) 



Moncecious. Sterile liorets ; anient naked, long, cylindrioal ; 

 periunth 6-lobed. Stamens 5—20. Fertile tlorets .'i, within a 

 muricat?,d involticre; perianth 5 — G-lobed, S(i/1<'j:i 0. Sad 

 1 — 3, inclosed by the involucre. 



1. C. TEs'cA, (L,) A large tree, generally with an erect trnnk and 



