THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY, 



[FOURTH SERIES.] 

 No. 40. APRIL 1871. 



XXX. — Descrijytions of some new or little-known Species of 

 Oaks from NortJi-west America. By Robert Brown, of 

 Campster, A.M., Ph.D., F.R.G.S., President of tlie Royal 

 Physical Society, Edinburgh. 



1. Quarcus Sadleriana, R. Br. Campst.* 



Leaf large, old ones broadly elliptical, young ones more 

 ovate, acute at base and apex, edges remotely serrate, teeth 

 submucronate, apex pointed ; nerves distinct on superior sur- 

 face, very prominent inferiorly, lateral nerves reaching the 

 margin in the teeth ; superior surface dark green, inferior 

 paler (fading in drying), glabrous above and below; length 

 4| inches, breadth 3 inches, length of petiole f inch (average 

 of six leaves). Fruit shortly pedunculate, solitary, rarely 

 twins ; glans projecting more than half out of tlie cup ; glans 

 small, ovate, or in some cases com])ressed at both ends, termi- 

 nating in a short blunt point, pale brown in colour ; length 

 |-J inch, diameter -|-§ inch : cup deepish, narrow inferiorly, 

 expanding superiorly, very thin, the edges bevelling off; 

 scales ovate, closely imbricate and appressed, swollen at base, 

 covered with white pubescence, the lower whorls large and 

 most distinct, the upper near the edge of the cup smaller and 

 less distinct ; depth of cup \ inch or less, breadth superiorly 

 f inch, length of peduncle g inch. Floioers unknown. Ma- 

 turation annual (?). 



Hah. A spur of the Siskiyou Mountains, in Oregon, close 

 to the California boundary line (lat. 42° N.), between Sailors' 

 Diggings in Oregon and Smith's River in California, on the 

 Crescent City trail. 



* lioberfiis Broicn Campsterioisis : by the advice of M. Alphonse De 

 CandoUe, I have adopted this distinctive mark for species described by 

 me (vide Trans. Bot. Soc. Edin. vol, x. p. 437). 



Ann. d' Maff. K. Hist. Ser. 4. Vol.xu. 18 



