t 



Plates XXIII & XXIV. 



QUERCUS DENSIFLORA, Hooker & Arnott. 



Bibliography, 



QuERCUS DENSIFLORA, Hook. & Arn., Bot. Buch. 391 : Hook. Ic. PI. iv, t. 380 (1841). 



, Nuttall, N. Am. Sylv. i, 11, t. v (1842). 



, Bentham, PI. Hartw. 339 (1849). 



, Torrey, Pac. R. Rep. iv, 138 (1857); Bot. Wilke's Exp. 458 (1874). 



, Newberry, Pac. R. Rep. vi, 31, 89 (1857). 



QuERCUS ECHINACEA, Torrey, Pac. R. Rep. iv, 137, t. xiv (1857). 

 QuERCUS DENSIFLORA, A. De Caiidolle, Prodr. xvi', 82 (1864). 



, Bolander, Proc. Calif. Acad, iii, 231 (1866). 



Pasania DENSIFLORA, CErsted, Vidensk. Meddel. 73 (1866). 



QuERCUS ECHINOIDES, R. Brown, Campst., Ann. & Mag. Nat. Hist. Apr. 1871, 2. 



QuERCUS DENSIFLORA, Bolander, Catal. PI. San Francisco, 27 (1870). 



, Engelm. Trans. St. Louis Acad, iii, 380; Bot. Calif, ii, 99 (1880). 



, Kellogg, Forest Trees of Calif. 69 (1882). 



, Behr, Fl. San Francisco, 270 (1888). 



Description. A bush of from three to ten feet high, or a stately and symmetrical tree 

 of from seventy to one hundred and fifty feet, the trunk rarely six feet in diameter, its 

 bark roughly fissured in old trees, smoothish and gray in the young state ; branchlets 

 densely tomentose : leaves coriaceous, two to five inches long, oblong, acute or obtuse at 

 apex, acute at base, the margin entire and revolute or dentate, or coarsely serrate, very 

 light green and glaucescent above, densely tomentose beneath : aments erect and dense 

 (pendulous and loose in all our other oaks), entirely staminate, or staminate above and 

 pistillate below, from four to six inches long : fructification biennial : cups shallow, from 

 three-fourths to one and one-fourth inches broad, covered with linear-subulate, loose, spread- 

 ing or recurved, or longer, more slender and somewhat tortuous scales ; nut oblong, an inch 

 long or more, obtuse or acute at apex and obscurely triangular above the middle, more or less 

 tomentose without and within. 



