fulvous-tomentose and ultimately pale on the lower surface; cup of the fruit usually thick. 25. Q. chrysolepis (G, H). Leaves oblong-lanceolate, crenate-dentate or entire, pubescent or tomentose below; cup of the fruit usually thin. 26. Q. tomentella (G). Fruit maturing at the end of the first season; shell of the nut glabrous on the inner surface (hoary-tomentose in 27); abortive ovules basal; stamens 6—8; styles dilated; lobes of the leaves not bristle-tipped. White Oaks. Leaves mostly persistent until the appearance of those of the following year, revolute in the bud (convolute in 28). Leaves yellow-green. Fruit sessile or short-stalked. Leaves oblong-lanceolate, entire or repand-dentate; inner surface of the nut hoary tomentose. 27. Q. Emoryi (F, H). Leaves oblong or obovate, entire, sinuate-toothed or lobed. 28. Q. dumosa (G). Fruit long-stalked; leaves oblong, elliptic or obovate, pale, glabrous or in one form densely tomentose below. 29. Q. virginiana (C). Leaves blue-green. Fruit usually in many-fruited long-stalked clusters; leaves broad-obovate, coarsely reticulate-venulose. 30. Q. reticulata (H). Fruit solitary or in pairs. Cup of the fruit saucer-shaped; leaves ovate to ovate-oblong, entire. 31. Q. Toumeyi (H). Cup of the fruit cup-shaped or hemispherical, oblong-lanceolate to broad-obovate, pubescent below. 32. Q. arizonica (H). Cup of the fruit usually cup-shaped or turbinate. Leaves ovate, oval or obovate, usually cordate at base; fruit rather long-stalked. 33. Q. oblongifolia (E, H). Leaves oblong to obovate, usually cuneate or rounded or cordate at base. 34. Q. Engelmannii (G). Leaves deciduous in their first season. Leaves blue-green. Arboreous; leaves oblong, lobed, spinescent-dentate or entire, pubescent below; cup of the fruit shallow cup-shaped. 35. Q. Douglasii (G). Arborescent or shrubby. Leaves oblong to oblong-obovate, undulate-lobed; cup of the fruit saucer-shaped to cup-shaped. 36. Q. Vaseyana (C).