62 ANGIOSPERM^. 



C. Annual-fruited; Am. and foreign. 



Q. confertifblia, Mexican Oak. 30° high. Lvs. lanceolate, ever- 

 green. Handsome mountain-tree. S. Arizona, San Francisco mts. 

 Q. Prlnus, Chestntit-Oak. 60°-90° high. Lvs. long-petioled, ob- 

 ovate, dentate, decid. ; acorns large, sweet. U. S., but not in N". Eng. 

 Several varieties. Q. bicolor. 60°-70° high. Lvs. similar to last; 

 cupule fringed at margin. Swamps, U. S. Q. lyrdta. 50°-80° high. 

 Lvs. lyrate. Cupule rough. N, C., S., W. Q. macrocdrpa, Bur- 

 Oak. 60°-70° high. Lvs. lyrate-pinnatifld. Cupule large, woody, 

 bur-like, border fringed. N. Eng. to 111., S. Q. obtusUoba, Post- 

 Oak. 40°-50° high, branching low. Lvs. deeply lobed. Cupule 

 naked, nut sweet. Mid., W., and S. States. Timber valuable, white. 

 Q. alba, White-Oak. TC-SO" high. Lvs. oblong, sinuate-pin- 

 natifid. "Wood white, valuable. Nut edible. U. S., Can. 



Quercus Robur, British Oak, Eukopban Oak. 80°-180° high, 

 with spreading branches, which sometimes cover a half-acre. Lvs. 

 lobed and serrate. Cupule without bristles. Nut edible. Two vari- 

 eties : pedunculdta, Common Oak. Cupules peduncled, wood light 

 in color ; sessiliflora, Dukmast, cupules sessile ; wood darker and 

 heavier. Both furnish renowned timber ; sometimes stained green by 

 the growth of a fungus (Peziza ceruginosa) , and then highly prized for 

 cabinet-work. $ fl.. Pig. 66. Eur. Quercus Cerris, Turkey-Oak, 

 Mossy Cup O. 60°-90° high. Lvs. evergreen or subevergreen. 

 Cupule mossy. Eructification biennial or annual. Wood valuable. 

 Asia Minor; naturalized in Bur. Many fine varieties. Q. Skinneri, 

 Guatemala Oak, has an acorn with lobed and wrinkled cotyledons, 

 resembling those of the Walnut [Juglans). 



Ord. 5. Juglandaces. Walnuts. — Els. ^P, monoehlamfd. De- 

 scribed, with the fr., Lessons XI. and XXVIII. Lvs. pinnate, alt. 

 Trees or Shrubs. 5 genera ; 30 species : 



1. Platycarya (Portunaea) sinensis, only spec. ; a bush resem- 

 bling Sumach ; nuts small, 2-winged, sol. in the axils of overlapping, 

 hard-pointed bracts, which form an erect cone. N. China, Japan. 

 2. Engelhardtia, magnificent trees resembling Walnut. Nute as 

 small as a pea, seated singly on the base of a 3-lobed, colored bract, 

 thus forming drooping catkins more than 1° long. 10 species, Ind., 

 Java, Philippine Islands. Wood valuable. E. spicdta. 180°-230° 

 high, trunk large in proportion. Java. 3. Pterocarya. Trees ; drupe 

 small, 2-winged, indehisc. Several spec. ; Caucasus, China, Japan. 

 4. Carya, Hickory. Epicarp 4-valved, falling off at maturity. 

 Wood fragrant and valuable. C. porcina, Pig-nut Hickory. 70°- 

 80° high. Nuts small, astringent. Common, U. S. C. amdra, Bit- 

 ter-nut H. 70°-80° high. Nuts small, bitter. N., U. S. C. 

 tomentosa. 40°-60° high. Nut edible ; very thick endocarp. N. 

 Eng. to Va. and Ky., S. C. sulcata. 40°-80° high. Nut edible, 

 endocarp thick. Penn. to Ga., W. C. microcdrpa. 60°-80° high. 

 Nut small, edible, endocarp thin. Penn. to Ky. and Tenn. C. alba, 

 White Hickory, Shell-bark H. 80°-90° high, slender ; wood 

 valuable. Nuts white, delicious ; endocarp thin. Maine to Wis., S. 

 to Ga. C. olivcefdrmis, PeoXn (Pa-cahn) or PecXna. 80°-90° high. 

 Nuts oblong, endocarp thin. River-bottoms, 111. to La., W. 5. Jiig- 

 lans, Walnut. Epicarp fleshy-fibrous, indehiscent; endocarp fur- 



