FAGACEJE 



259 



tered pale stellate hairs and below and on the petioles with thick hoary tomentum, 

 at maturity thick and coriaceous, dark green, glabrous and lustrous on the upper 

 surface, pale and covered with stellate hairs on the lower surface, 2'-4' long, l'-2' 

 wide, with thickened strongly revolute margins, and pubescent midribs, gradually 

 deciduous during their third season; their petioles stout, pubescent, about ^' long. 

 Flo"wers: staminate in pubescent aments 2^'-14' long, calyx light yellow, stellate- 

 pubescent, divided iuto 5-7 ovate acute lobes; pistillate subsessile or in few-flowered 



hc,.2/0 



spikes on short or elongated pubescent peduncles, their involucral scales like the calyx 

 coated with stellate hairs; stigmas red. Fruit subsessile or short-stalked; acorn 

 oval, broad at the base, full and rounded at the apex, about 1^' long and f wide, 

 inclosed only at the base in a cup-shaped shallow cup thickened below, light brown 

 and pubescent on the inner surface, and covered by thin ovate acute scales, with free 

 chestnut-brown tips more or less hidden in a thick coat of hoary tomentum. 



A tree, 30-4:0, or occasionally 60 high, with a trunk l-2 in diameter, spread- 

 ing branches forming a shapely round-topped head, and slender branchlets coated at 

 first with hoary tomentum, becoming light brown tinged with red or orange color. 

 Winter-buds ovate, acute or obtuse, nearly y long, with many loosely imbricated 

 light chestnut-brown scales more or less clothed with pale pubescence. Bark thin, 

 reddish brown, broken into large closely appressed scales. Wood heavy, hard, 

 close-grained, compact, pale yellow-brown, with lighter colored sapwood. 



Distribution. Deep narrow canons and high wind-swept slopes of Santa Rosa, 

 Santa Cruz, and Santa Catalina islands, California; on Guadaloupe Island off the 

 coast of Lower California. 



2. Stamens usually 6-8 ; stigmas dilated ; fruit maturing at the end ofthejirst season; 

 shell of the acorn glabrous on the inner surface Qioary-tomentose in J/J) ; abortive 

 ovules basal. White Oaks. 

 *Leaves or their lobes usually without bristle tips except on vigorous shoots. 

 -i-Leaves deciduous in their first autumn or winter. 

 ++Leaves lyrate or sinuate-pinnatifd, rarely entire. 



25. Quercus alba, L. White Oak. 



Leaves obovate-oblong, acute or rounded at the apex, gradually narrowed and 

 wedge-shaped at the base, divided into usually 7 oblique broad or narrow mostly 



