ARBORETUM AND FRUTICETUM. 



PART III. 



toothed towards the top ; glaucous, and quite glabrous. Fruit racemose, (llumb. ct Bonp.} A very tall 

 straight tree, quite glabrous ; younger brandies angular. 1 -eaves 3 in. to 4 in. long, membranaceous. 

 Petioles about in. long, thickish. Male flowers beneath the female, in aggregate axillary catkins. 

 Female racemes axillary. Flowers sessile. Male flower: calyx bell-shaped, hairy on the outside 

 limb unequally dentate; stamens 5 to 8. ; anthers 2-celled, erect, opening longitudinally. Female 

 flower: ovary globose, small; style 1, very short; stigmas 3, spreading, thickish. A native of 

 the warm parts of Mexico, between La Ven{a de la Mojonera and La Ycnta de Acaguisocla ; 

 where it forms forests, at an elevation of above 2300 ft. (397 toises) above the level of the sea. 

 The wood is of great value to the inhabitants, from its supplying the greatest part of the charcoal 

 consumed in Mexico. 



Q. obtushta Humb. et Bonp. PI. JEquin., t. 76., and our fig. 1854., Michx. N. Amer. Syl., 1. p. 112. 

 Leaves oblong; blunt at each end, unequal at the base, wavy at the margin, very veiny beneath, 

 and somewhat downy. Fruit race- 

 mose (Humb. e t Bonp.} A native of 

 New Spain, near Ario, at an ele- 

 vation of about 6000 ft, (994 toises). 

 A lofty tree, with a trunk from 3 ft. 

 to 4ft. in diameter, covered with 

 a very thick deeply cracked bark. 

 Branches covered with tubercles ; 

 younger ones leafy, dowy. Leaves 

 from 5 in. to fi in. long, leathery, 

 glabrous and shining above. Petioles 

 | in. long. Cups somewhat globose. 

 Scales closely imbricated. Nut sphe- 

 rical, nearly covered by the cup. 

 This oak is called Q. obtusata, be- 

 cause the base, the tip, and the di- 

 visions of the leaves are blunt, and 

 without any point. The wood is 

 very compact, susceptible of taking 

 a fine polish, and of resisting a great 

 force. The tree is remarkable for 

 its height, the thickness of its trunk, 

 the glaucous colour of the scales of 

 the cup, and, above all, by the scales 

 being imbricated the contrary way ; 

 that is to say, the point of each 

 scale is turned towards the peduncle. 

 This and Q. lanceolata are the only 

 Mexican species that are known to 

 have all the scales in the cup of 

 the acorn imbricated from the nut 

 to the peduncle. According to Michaux, this species is very tall, with a remarkably straight trunk ; 

 and is found in the elevated and dry parts of New Spain, near Ario, where it flowers in September. 



Q.pandurdta Humb. etBonp. Pl.JEquin.,t. 77., 



and our figs. 1855. and 185d, Michx. N. Amer. 

 Syl., 1. p. 111. Leaves oval-oblong, somewhat 



J 



1855 



18.56 



fiddle-shaped ; acute at the point, unequally cor- 

 date at the base, wavy and slightly sinuate on the 

 margin, downy beneath. Fruit racemose. (Humb. 

 ct Bonp.} Found in the same habitat as the pre- 

 ceding. A tree, from 18 ft. 

 to 24 ft. high. Branches 

 alternate, glabrous ; the 

 | younger one* coveredwitb 

 short hairs, visible to the 

 naked eye. Leaves alter- 

 nate, from 3 in. to 5 in. 

 long ; glabrous above, 

 downy beneath. Petioles 

 1 in. long. Scales of the 

 cup closely imbricated, ex- 

 ternally convex, glaucous. 



Nut ovate, half-covered by the cup. This oak is 

 closely allied to Q. obtusata, but differs in size, 

 in the form of the leaves, and the disposition 

 of the scales of the cup. Humboldt is of opinion 

 that the wood is lighter, and less compact, than 

 that of Q. obtusata 



Q. repdnda Humb. et Bonp. PI. ^quin., t. 79., and our fig. 1857. , Michx. N. Am. Syl., 1. p. 108. 

 Leaves oblong-oval, on short footstalks ; downy beneath, glabrous above; slightly repand; recurved 

 at the margin. Fruit racemose. (Humb. et Bonp.} A shrub, 2 ft. high, branched from the very base, 

 procumbent or erect. Branches alternate, round, quite smooth ; younger ones covered with white 

 down. Leaves 1| in. long, leathery ; younger ones lanceolate, downy on both sides, quite entire. 

 Stipules linear awl-shaped, persistent, downy. Male flowers inferior, in aggregate axillary catkin;. 

 Female flowers superior, axillary, and sessile. Male flower : calyx campanulate, limb unequally den- 

 tate ; stamens 5 to 7, three times as long as the calyx, erect. A native of New Spain, in moist shady 

 places, between Real del Monte and Moran, at an elevation of above 7700 ft. (1^91 toises). It is the 

 smallest of all the species of oak in Mexico, forming extended masses, and having the branches 

 of one interlaced with those of another. The young shoots of Q. repanda agree with the description 

 of Q. microphy"lla given by Nees in the Anales de las Cienc. Nat., iii. p. 264. ; but Humboldt had 

 not seen Nees's plant, and, therefore, could not determine whether they were the same. 



Q. latirina Humb. et Bonp. PI. ^Equin., t. 80., and our Jig. 1858., Michx. N. Amer. Syl., 1. p. 108. 

 Leaves oval-lanceolate, sharply acuminated, quite glabrous: some area little ; 3- pointed at the tip. 

 Fruit axillary, almost sessile. (Humb. et Bonp.} A tall tree, with the habit of .Laiirus nobilis, 

 glabrous in all parts, Leaves 2 in. to 3 in. long, leathery. Petioles about J in. in length. Female 

 flowers axillary, almost sessile, and solitary. Scales of the cup ovate, obtuse, membraimreous, 

 covered externally with a peculiar down, like powder. A native of the woods in the temperate parts 



