8pecies of Oaks from Narth-ioest America . 251 



appearance, suddenly constricted and terminating in a sharp 

 membranous point, tlie lower scales largest, upj)er much 

 smaller, closely aggregated and indistinct, covered with a 

 dense white' pubescence; depth 1\ inch, breadth | inch, 

 length of peduncle ^ inch. Floioers unknown. Maturation 

 annual. 



Hah. in "gulches " from 2500-4000 feet above the sea, in 

 the Siskiyou Mountains, but chiefly on Canon Creek, in 

 Southern Oregon, lat. 42° 10' N. 



In character this species approaches the group of which 

 Quercus Garryana, Dougl.*, is the type, but differs entirely 

 in the character of the cup, the size and lobation of the leaves, 

 and in its being always a shrub. Like Q. Garryana^ it pre- 

 fers prairies and low lands ; but the locality where I have 

 seen it most plentiful was on spurs of the mountains, at 

 elevations of 2500-4000 feet. It ought also to be noted that 

 wherever found on level lands, these are situated at a much 

 higher elevation than the open grounds affected by Q. Gar- 

 ryana. Though a shrub, it bears very plentifully ; and the 

 acorns are accounted very nourishing, the produce of forty or 

 fifty bushes being sufficient to fatten a hog. As a species it 

 is very distinct from any in North-west America, and, as far 

 as I am able to learn, as yet undescribed. It is " Quercus, 

 sp. (fZ), No. 249 " of my catalogue {J. c), and, like the former, 

 was discovered by me in Sept. 1865. It belongs to the divi- 

 sion Lobatee of the section Eulepidohalanus of the subgenus 

 Lejndohalanus (Qilrsted, Section I. Lepidohalanus^ A. DC. pro 

 parte). I have the honour to dedicate it to Dr. A. S. CErsted, 

 ' Professor of Botany in the University of Copenhagen, and 

 Inspector of the Polytechnic School there, a distinguished 

 traveller and naturalist, and the author of the able memoir on 

 the classification of the oaks to which I have already referred. 



3. Quercus echinoides^ R. Br. Campst. 



Leaf perennial, small, lanceolate, oblong-elliptical or rarely 

 obovate, shortly petiolate, serrate (except near the base), en- 

 tire or with only a sinuate margin ; nerves hardly distinct 

 above, very distinct inferiorly, reaching margin at base of 

 teeth when present, superiorly glabrous or slightly pubes- 

 cent, inferiorly covered with a cinereous down ; length of 

 leaf 1^ inch, breadth | inch, length of petiole ^ inch. Fruit 

 solitary or clustered in groups of 2-5 in axils of leaves, 

 united to stem by a short thick peduncle, densely covei-ed 

 with cinereous pubescence, or sometimes sessile or subsessile ; 



• Hooker in 'Flor. Hor.-Am.' ii. p. loO. 



18* 



