ENGELMANN OAKS OF THE UNITED STATES. 393 



stantly been confounded with ^. Emoryi) with small (i inch or less long) 

 sinuate-dentate leaves, the teeth very rigid and pungent. Var. grisea (^. 

 grisea, Liebm., Wright 665 from West Texas) with oblong, more or less 

 entire, often hoary leaves, which commonly passes for ^. oblongifolia, 

 can scarcely be distinguished from pungens, as both forms occasionally 

 are found on the same bush. Var. grandi/olia, with very large (3-5 inches 

 long) nearly entire or undulate leaves and very long peduncles, was found 

 by Dr. Palmer in Arizona and by Mr. Brandegee on the upper Arkansas. 



<:^. oblongifolia, Torr. Bot. Sitgr. t. 19, not of Bot. Mex. Bound., the 

 South California "Live-oak," a bush or a middle sized tree with pale flaky 

 bark; oblong, obtuse, coriaceous, subpersistent leaves, at first soft downy, 

 but scon glabrous on both sides (like those of ^. alba) ; short, oval, woolly 

 calyx lobes, and sessile or short peduncled acorns. The leaves of young 

 shoots are usually dentate, those of fertile trees are entire or rarely sinu- 

 ate. — This species seems to come to perfection on the coast mountains and 

 in the valleys of Southern California from San Diego to San Luis Rey and 

 Los Angeles, but extends into Western New Mexico, where it was first dis- 

 covered, and into the adjacent parts of Mexico (Chihuahua, Dr. Gregg). 



^. dtitnosa, Nutt. (see p. 3S2), the characteristic scrub-oak of the CaJi- 

 fornian coast ranges from San Francisco southward, is closely allied to the 

 last and still more so to var. p'ungens of ^. undulata, but occupies a dif- 

 ferent geographical range, has more sinuate-dentate than spiny-toothed 

 leaves, dark green above ; calyx lobes lanceolate, acute. The cup scales are 

 strongly tuberculate, or rarely almost even. — Coulter's 661, on which Lieb- 

 mann founded his ^. berberidi/olia, is exactly this species; but Fremont's 

 specimens, also quoted by him, at least those in Hb. Torrey,.all belong to 

 pungens. 



Var. bullaia, with thicker, paler, convex leaves, persistently woolly on 

 both sides, has been found on the Santa Lucia mountains and near New 

 Idria by Brewer, and in Pope Valley by Bolander. 



Pag. 382, 1. 12 from below, put entire, dark for " entirely dark." 



Pag. 383. 4^. chrysolepis — I distinguish as a subspecies ^.vacciniifolia, 

 Kellogg, a small-leaved evergreen shrub of the Sierras, the oblong or lan- 

 ceolate leaves, except in young shoots, entire, rarely more than i inch long, 

 the yellowish scurf very deciduous or sometimes entirely absent. Another 

 extreme and somewhat aberrant subspecies I name for its discoverer ^. 

 Palmeri. It is a stout and scraggy shrub, in the mountains 80 miles east 

 of San Diego, S-io feet high, with very rigid and spiny, sinuate-toothed, 

 broadly oval leaves, less than i inch long, scurfy on the lower side; 

 anthers about 10, smaller than in chrysolepis, emarginate, not cuspidate; 

 cup obconic (f inch wide, J inch high) ; its scales almost hidden in the 

 dense, fulvous tomentum ; nut inside densely woolly, which I find in no 

 other White-oak; abortive ovules basal. 



^. totnentella, n. sp., is an oak from the Island of Guadaloupe off the 

 coast of the Californian peninsula, which I had formerly classed with 

 chrysolepis (Palmer, Flor. Guad. Nos. 88 & 89), but which appears to be 



