(i95) 



dulata often have leaves that strikingly resemble the usual 

 leaves of J^. Fcndlcri. 



£>iiercus grisea Liebman * as represented by the type, 

 Wright, 66j, and by his 1866 also cited by DeCandolle, has 

 small oval, entire leaves, which are only 2-3 em. long, thick, 

 evidently persistent and so described, densely stellate-tomi 

 tose and more reticulate beneath. In fact they are inter- 

 mediate between those of J^. Arizonica and JQ. oblongifolia 

 but smaller than in either. To me there is no doubt that it is 

 distinct from ££. undulata; the cup is shallower than in the 

 two preceding and 10-12 mm. in diameter; the acorn 

 like that of £>. Fendleri and not of the nearer related J^. un- 

 dulata. Sargent's PI. 385, Fig. 9 represents a leaf of this 

 species. 



Jgjtercus -pungens Liebman, f the type of which is Wright, 

 66 j, is much closer to j£. undulata than any of the preced- 

 ing, differing in the deeper lobing of the leaves, their some- 

 what firmer texture and the evident spinulose tips. Usually 

 the leaves are also decidedly undulate-crisped with the lobes 

 bent or twisted. The acorn resembles that of J£. undulata, 

 but is often somewhat thicker ; the cup is shallower, and often 

 1 cm. wide. 



£>uercus oblongifolia Torr. in the Mexican Boundary Sur- 

 vey is the same as J^. grisea Liebman, except Parry's speci- 

 men, which probably belongs to J^. Engelmannii Greene. 



Jgiiercus undulata obtusifolia A. V>C\ is a peculiar oak 

 combining the texture, pubescence, veining and color of the 

 leaves of the J^. undulata series with the lobing and form of 

 some members of the Gambdii group and i?. breviloba. The 

 leaves differ from a broad-leaved form of the latter only in the 

 thicker texture and a more prominent pubescence. To refer 

 this oak to i?. undulata is scarcely admissible. The type, 

 Fendler's no. 807 has no fruit ; but very similar specimens 

 have been collected by Dr. Havard, and in these the cup is 



*Oversigt Dansk. Vidensk. Sclsk. Forhandl. 1854 : 171. 

 tOversigt Dansk. Vidensk. Sclsk. Forhandl. 1854 : i? 1 - 

 % Prod. 16- : 23. 1864. 



