323 DICOTYLEDONOUS PLANTS. 



* Fructification liennial. Leaves setaceously mucronatt. 

 t Leaves entire. 



1. Q. phcllos Linn. : leaves deciduous, linear r lanceolate ? tapering ai 

 each end, very entire, smooth, mucronate ; acorn nearly round. 



HAB. Low swampy forests. N. J.. to Flor. May. J>. A tree 

 from 30 to 60 feet high, -generally straight and slender. I.' 

 when young of a light green colour and dentate. Acorn small, 

 nearly round. ^The timber is of little use. Willow Oak. 



2. Q. imbricaria Mich. : leaves deciduous, oblong, acute at each end, 

 mucronate, very entire, shining, pubescent beneath ; cup shallow \ 

 scales broad ovate ; acorn subglobose. 



HAB. Banks of rivers in iriounta'neous regions. Penn. to Car. 

 W. to Miss. June. *?. A tree 4050 feet high, with nu- 

 merous irregular branches. Aeorn small, nearly spherical, in a 

 flat nearly sessile cup. The wood splits easily and is used in 

 the Western State's for shingles. . * ShingU Oak. 



V ft Leaves dentate or with short lobes. 



3. Q. hetcropkylla Mich. : leaves on long petioles) ovate-lanceolate or 

 oblong* entire or coarsely toothed ; cup hemispherical ; acorn subglo- 

 bose. ' r '* < j 



HAB. Banks of. the Delaware.- Penn. May. *>. According to 

 Pursh, there id only one individual of this species known, which 

 ffrows near Philadelphia. He suggests that it may be a hybrid. 

 It is figured and described by Michaux in his Sylva Amencaua. 



\ 4. Q. aquatica Walt, .'.leaves obovate-wedgerform, smooth, very en- 

 tire, obscurely 3-lofced at the end, with the middle lobe largest ; cup 

 hemispherical ; acorn subglobose. Q. nigra Linn. 



HAB. Swamps. Md. to Flor. May. !>. A tree 30- 40 feet 

 high. Leaves very variable. Cup snallow. Atom rather small, 

 roundish. Resembles Q. laurifolia. Its timber is of no value. 

 ',.{. Water Oak. 



5. Q. triloba Linn. : leaves oblong- wedge-form, acute at the bas.e, 

 somewhat 3-lobed at tne end ; lobes equal, mucronate, tofhentose be- 

 neath, middle one longer ; cup flat ; acorn depressed;- globose. 



HAB. Pine barrens. Nl J. to Geor. May. >. A tree 2040 

 feet high, of rapid growth. Doicny Black Oak. 



G. Q. nigra Willd. : leaves coriaceous, wedgeform, subcordate at base, 



dilated and retusely 3-.lobed at the summit ; when young mucronate, 



smooth above", rusty and pulverulent beneath ; cup turbinate, with 



scales obtuse and sdarious ; acorn short, orate. Q.Jerruginea Mich.f. 



HAB. Sandy woods. N. J. to Flor. May. ^ .A tree 2030 



feet high, irregular in its growth, and covered with a thick rough 



black bark. The wood is much esteemed for fuel. 



Barren Oak. Black Jack. 



7. Q. tinctoria Bartram : leaves gbovate-oblong, slightly sinuate, pu- 

 bescent beneath ; lobes oblong, obtuse, obscurely toothed, mucronate : 

 cup flat : acorn depressed-globose. . ^ . v . . 



