CUPULtFER^. (OAK FAMILY.) 33;j 



margined. — Bot. Calif, ii. 81. Ranges eastward with the species, bat extendi 

 westward to the S. Sierra Nevada and Oregon. 



3. CORYLUS, T.-urn. lU/Kb-vcT. 



Sterile flowers in drooping cylindrical catkins. — Shruljs with douMy- 

 toothed leaves, flowering in early spring: sterile catkins singlo or fxMiclcd 

 from scaly buds of the axils of the preceding year, liic fertile terminating 

 early leafy shoots. 



1 . C, rostrata, Ait. Shrub 2 to 5 feet high : leaves ovate or ovat^ 

 oblong, somewhat heart-shaped, pointed: involucre of united bnu-ts, much 



prolonged above the ovoid nut into a narrow tubular beak, den.sely bristly. 



From Colorado to Washington, thence northward and eastward to the 

 AUeghauies. 



4. QUERCUS, L. Oak. 



Sterile flowers in naked catkins. Fertile flowers scattered or somewhat 

 clustered. — Flowers greenish or yellowish: sterile catkins single or often 

 several from the same lateral scaly bud: flowering in the spring and shed- 

 ding the nuts in the fall. — Our two species are " White Oaks," being annual- 

 fruited and having sweet kernels. 



1. Q. macrocarpa, Michx. Leaves obovate or oblong, lynitely pin- 

 natifid or deeply sinuate-lobed, or nearly parted, downy or pale beneath ; the 

 lobes sparingly and obtusely toothed, or the smaller ones entire: cup dtep, 

 conspicuouslij imbricated with hard and thick-pointed scales, the upper ones owned, 

 so as usually to make a moss j/ fringed border: acorn half immersed in or entire! if 

 enclosed btj the cup/— Throughout the Atlantic States and coming within our 

 range at its northeastern limit. North of the Missouri Kiver a low scrubby 

 form is found, which has been called var. depressa, Engelm., having also 

 smaller leaves and much smaller acorns than the species. 



2. Q. ■undTllata, Torr. Leaves from lyrate to nearly entire, always 

 downy below: the sweet and edible acorns oval, oblong, or sometimes clou- 

 gated: the subhemispherical, sessile, short- or sometimes long-peilumled cup 

 varies from scaly to very knobby. — Ann. Lye. N. Y. ii. 248, t. 4 ; Kngelm. 

 in Trans. St. Louis Acad. iii. 382, 392. An exceedingly variable s|)ecip.s, 

 embracing, as now understood, all the Rocky Mountain forms. These forms 

 can be arranged in two groups as follows : — 



* Leaves larger, strongly lobed, darker green, and decidedly deciduous : cah/T- 

 lobes narrower, ciliate: acorns often thicker and shorter. — From W. '1 exa.-* 

 through Colorado to Utah and Arizona. 



Var. Gambelii, Engelm. The large leaf with broader em:irginate or 

 even lobed divisions. — Q. Gambelii, Nutt. 



Var. Gunnisoni, Engelm. Lobes of the leaf narrow and entire. — Q. 

 alba, var. Guuniso))/, Torr. 



Var. breviloba, Engelm. Leaves sinuate or broad- and sliort-lobod. — 

 Q. obtusiloba, var. breviloba, Torr. 



Var. Jamesii, Engelm. Like var. Gunnisoni, but the smaller and moro 

 riirid leaves with acute lobes. 



