406 CUPULIFERyE. (OAK FAMILY.) 



# * * Leaves deciduous, but rather coriaceous, mostly dilated upwards and ilxurcly 

 lobed or entire, in the same individual, sometimes more conspicuously lobed, often mor* 

 or less bristle-pointed at the summit and extremities of some of the larger veins. 



11. ^. aquatica, Catesby. (WATER-OAK.) Leaves glabrous and shin - 

 inn, obovate-spatulate or narrowly wedge-form, with a long tttperiny base, varying to 

 oblanecolatc ; cup saucer-shaped or hemispherical, of line and close scales, much 

 shorter than the globular acorn. Wet grounds, around pouds, &c., Maryland 

 to Virginia and southward. Tree 30 -40 high. Aconi ' long; the cup of 

 the same width. 



12. <^. iilgra, L. (BLACK-JACK or BARREN OAK.) Leaves broadly wc-dgt' 

 shaped, but mostly rounded or obscurely cordate at the base, icidely dilated and 

 somewhat 3-lobed (rarely 5-lobcd) at the summit, occasionally with one or two 

 lateral lobes or teeth, rust.y-pubcsccnt beneath, shining above, large (4' -9' long) ; 

 cup top-shaped, coarse-scaly, covering half of the short ovoid aconi. (Q. fcrru- 

 ginea, Michx.) Dry sandy barrens, from Long Island, New York, to Illinois, 

 and southward. Tree 8 -25 high. Acorn '-' long. Leaves occasion- 

 ally rather deeply lobed, the lobes strongly bristle-pointed. Under the name 

 of Q. TRIDENTATA, Dr. Engclmann distinguishes a remarkable Oak. apparently 

 a hybrid between this and Q. imbricaria. Under this section the following re- 

 markable forms, by some regarded as species, would be sought, vi/. : 



Q. LEANA, Nutt. (LEA'S OAK), of which single trees are known near Cin- 

 cinnati, Ohio, and Augusta, Illinois (Mead), is probably a hybrid between Q. 

 imbricaria and Q. tinctoria, or possibly Q. nigra. 



Q. HETEROPHYLLA, Michx. (BARTRAM OAK ), rediscovered in Delaware,<tc. 

 apparently a hybrid between Q. Phellos and Q. tinctoria? 



* # * * Leaves deciduous, lobed or pinnatijid, loncj-petioled, the tips of the lobes bris- 



tle-pointed. BLACK and RED OAKS. 

 H- Mature leaves doumy underneath. 



13. <fc. ilicifolia, Wang. (BEAR or BLACK SCRUB-OAK.) Dwarf; 

 leaves obovate, wedge-shaped at the base, angularly about b-lotml, ichitcnctl-dctniij un- 

 d< rnmth ; cup flattish-top-shaped ; acorn ovoid. Sandy barrens and rocky hills, 

 New England to Ohio and W. Virginia. (Q. Banistcri, Michx.) A straggling, 

 crooked shrub, 3 - 8 high. Leaves 2' -4' long, thickish. Acorns barely ' 

 long. 



14. C|. falcata, Michx. (SPANISH OAK.) Lrarts wtn/Mi-tlou-ny under- 

 rcath, obtuse or rounded at the Ixisc, 3 - r>-.W,r</ above. ; tfte lobes prolonged, n^ffy 

 narrow and more or less scylht'-shiipid, especially the terminal one, entire or spar- 

 ingly cut-toothed ; cup saucer-shaped ; acorn spherical or somewhat depressed (( 

 long). Dry or sandy soil, from New Jersey and Illinois southward. A small 

 or large tree, extremely variable in foliage : a variety with shorter lobes is Q. 

 triloba, Willd. 



*- -t- Mature leaves glabrous on both sid,s or nmrfy so. 



- Cup conspicuously scaly, more or less top-shaped or cont,\tct,d at the lase : acorn 

 one third or nearly half immersed, 



15. <fc. tinctoria, Bartram. (QUERCITRON or BLACK OAK. YELLOW- 

 BARKED OAK.) Leaves more or less rusty-fntl>esceni. trltcn yoiin'/, nearly glabrous 



