198 POPULAK FLOKA. 



85. OAK FAMILY. Order CUPULIFER^. 



Trees or shrubs, with alternate and simple straight-veined leaves, deciduous stipules, and 

 monoecious flowers ; the sterile flowers in slender catkins (or in head-like clusters in the 

 Beech) ; the fertile flowers surrounded with an involucre which forms a cup, bur, or bag 

 around the nut. 



Fertile flowers scattered, or 2 or 3 together, their 



Involucre one-flowered, of many little scales, forming a cup around the base of the 



hard and roundish nut or acorn (l-'ig. 205), {Qfienus) Oak. 



Involucre containing 2 or 3 flowers, becoming a very prickly and closed bur enclos- 

 ing the nuts, and splitting into 4 thick pieces. 

 Nuts 1 to 3, roundish or flattish, thm-shelled. Sterile catkins long, ( Caslanea) Chestnut. 

 Nuts 2, sharply 3-angled. Sterile catkins like a head-like cluster, (Fagm) BicECH. 



Involucre a leafy cup, lobed or torn at the end, longer than the bony nut, ( Corylus) Hazel. 



Fertile flowers also collected in a kind of catkin. Nut slnall like an akene. 



Involucre an open 3-Iobed leaf, 2-flowered, V _ ( Ccirjnnus) HornbeA5i. 



Involucre a closed bladdery bag, one-flowered, the whole catkin itoking a fruit like 



a hop in general appearance, '■- ' ( Ostrya) Hop-Hokkeeam. 



^. 



Oak. Qiiercus, 



* Acorn ripening the first year, therefore borne on shoots of fhe season: cups stalked, except iu 



No. 2 : kernel generally sweet-tasted. 



1. 0>"ERCUP or Bur Oak. Leaves obovate, sinuate-pinnatifld, whitish-do.\yiy beneath; acorn 1' or 



li' long, in a deep cup with a mossy-fringed border. Q. macrocdrpa. 



2. Post Oak. Leaves oblong, pale and rough above, grayish-downy beneath, pinnatifid, with 5 to 7 



blunt lobes; cup saucer-shaped, much shorter than the acorn. Small tree. Q. obtusiloba. 



3. White Oak. Leaves smooth when full grown, pale beneath, pinnatifid; the lobes 5 to 9, oblong or 



linear, entire; cup much shorter than the oval or oblong acorn. Eich woods. Q. alba, 



i. Swamp Chesthut-Oak. Leaves obovate, whitish-downy beneath, coarsely and bluntly toothed 



or sinuate; cup thick, hemispherical, with stout or pointed scales; acorn oval, 1' long. Q. Primus. 

 6. Yellow Chestnut-Oak. Leaves lance-oblong, or oblong, acute, whitish, but scarcely downy 



beneath, rather sharply and evenly toothed; cup thin, and acorn smaller than in No. 4. Eich 



woods. Q. Castanea. 



6. Chinquapin Oak. Much like No. 4, but a mere shrub, 2° to 6° high, with a thin cup and a smaller 



acorn. Sandy, barren soil. Q. prhimdes. 



* * Acorn ripening in the autumn of the second year; ripe fruit therefore on wood two yeara old, 



sessile: kernel bitter. 

 H- Leaves entire or nearly so, narrow. 



7. Live Oak. Leaves thick, evergreen, hoary beneath, oblong, small. Sea-coast, S- Q. vircns. 



8. Willow Oak. Leaves light green, smooth, lance-linear, tapering, S' or 4' long. S- & W- Q. PheUos. 



9. Shingle or Laurel Oak. Leaves shining above, rather downy beneath, lance-oblong, thickish; 



cup saucer-shaped; acorn globular. Common S. & W. d. imiricaHa. 



