QUERCUS NIGRA 351 
“Quercus foliis cuneiformibus obsolete trilobis, intermedio 
productiore. 
Quercus aquatica folio non sinuato ad finem triangulato. 
Clayt. n. 782.” 
Tt will be seen from the above that the original ae in in 
Fl. Vir, 6: has ee extended by two tic to differentiate the tw 
eg ogra a ct.). 
S$ are Sifisiently characterized in Catesby’s plates—it 
is a mage sy to see why A. De Candolle called one “ mala” 
and the other “ pessima’’—and indeed are usually readily separ- 
able; but we have excellent specimens ae Catesby which set at 
“Qu 
rest any possible doubt which might raised. The ercus 
(forte) Marilandica,” &e. (t. 19)—Q. mar. pilaidack Muench—is i 
Catesby’s collection in Herb. Sloane 232, f the ‘‘ Quercus 
folio non serrato,” &c. (t. 20)—Q. nigra L.—on f, 96 of the same 
volume. We have also, from Gronovius’s Herbarium, the Clayton 
numbers 782 and 789, ‘which represent the plants of which the 
diagnoses have been cited. 
e synonymy is as follows :— 
Quercus nigra L. Sp. Pl. 995 (1753); 1 ieee ed. 8, 10 
S ; Du eet Harbk. Baumz. ii. 272 (1 Nad ey Britton & 
Ill. Fl. i. 519 (1896); Britton, aie Fl. . 8. 335 
(isol); Gray's New Man. 34 " wet 
Q. nigra aquatica Lam. Encyel. i. 721 (17 
Q a Walt. Fl. Carol. m4 (1788) ; {Solander ae Ait. 
ew. iii. 357 (1789), MSS., et in nks !; 
U8. eds. 4 Am 
132. (1893- 4); Index awonati ii. 672 (1895), et eek. 
lur 
Q. aomalits “ Catesb.” Chapman FI. 8. U. S. eds. 1-3. 
QUERCUS MARYLANDICA Muenchhausen, scone v. 253 (1770), 
ex Du Roi, Harbk. Baumz. ii. 272 (1772); Britton & Br. 
Ill. FI. i. 518 (1896); Britton, Man. Fl. N. U.S. 334 (1901); 
Gray’s New Man. 344 (1908). 
Q. nigre ee Sp. Rte 996 (1753) 
Q. nigra latifolia Lam. Eneyel. i. 721 (1785). 
Q. nigra Walt. FI. Oatal 234 (1788) ; [Solander Si = Hort 
iil anks.! Mi 
Kew. iii. 357 (1789), MSS.! et in Her ichaux, 
hénes Amer. tt. 22, 2 801); Willd. Sp Pl. iv. 442 
(1805) ; Prodr. xvi. 2, 63 (1864) ; apo Man. Bot 
8. eds. 1-6; Chapman, FI. 8. U.S., eds. 1-8; List 
of Pteridophyta N. Amer. 133 (1893 -4) ; tiga Kewensis 
ii. 675 (1895); et auct. perplur. 
2n3 
