1478 



QUEECUS 



QUERCUS 



Staminate catkins slender, pendu- 

 lous : pistillate fls. in separate 

 axillary spikes (For AA, see spe- 

 cies No. 40). LEPIDOBALANUS. 

 B. Walls of nut tomentose on the 

 inner surface: Ivs. lobed, with 

 bristle-tipped teeth and lobes or 

 entire, bristly-pointed, but not 

 serrate and not evergreen: fr. 

 ripening the second year: bark 

 dark-colored, not scaly. BLACK 

 OAKS. Melanobalanus. 

 c. Lvs. ptnnatifid, slender- 

 stalked. 



D. Lobes of Ivs. usually 

 toothed: under side 

 glabrous or rarely pu- 

 bescent. 



B. Cup shallow, saucer- 

 shaped, broader than 

 high 



EB. Cup ttirbinate or hemi- 

 spherical 4. 



5. 

 6. 



DD. Lobes of Ivs. entire or few- 

 toothed: under side whit- 

 ish or grayish tomentose. 1. 



CC. Lvs. obovate, 3-5-lobed at the 

 apex or almost entire, short- 

 stalked. . , 



8. 



10, 



palustris 



rubra 



Texana 



coccinea 



Kelloggii 



velutina 



cuneata 

 ilicifolia 



nigra 

 Marilandica 



CCC. Lvs. oblong or linear-oblong, 

 entire, rarely remotely 

 toothed .11. Phellos 



12. imbricaria 



13. laurifolia 



B. Walls of nut glabrous on the in- 

 ner surface (except Nos. 38, 39) : 



Ivs. sinuately lobed or toothed, 

 not bristle -tipped, rarely ser- 

 rate with bristly teeth; the ever- 

 green Ivs. sometimes entire: fr. 

 ripening the first year (except 

 Nos. 14, 38, 39) . WHITE OAKS. 

 Leucobalanus. 

 C. Foliage deciduous. 



D. Lvs. sinuately dentate or 



serrate. 



E. Scales of cup linear or 

 lanceolate, spreading 



and recurved 14. variabilis 



15. dentata 

 BE. Scales of cup oppressed, 



imbricate. 



F. Petioles very short: Ivs. 

 cordate at base, al- 

 most sessile 16. Mongolica 



FF. lr etioles rather slender; 



Ivs. cuneate or 



rounded at the base. 



G. Lobes of Ivs. ac^lte..l7 



GG. Lobes of 

 rounded. . . 



Ivs 



18. 

 19. 



'20. 

 21. 

 22. 

 DD. Lvs. pinnately lobed. 



B. Bark separating in thin 

 scales, light gray or 

 light brown. Ameri- 

 can species. 



p. Under side of Ivs. pu- 

 bescent or tomentose. 

 G. Length of Ivs. 5-8 

 in.: Ivs. lyrate- 



pinnatifid 23. 



24. 

 25. 



glandulifera 



prinoides 



Muhlenbergii 



Michauxi 



Frinus 



bicolor 



GG. Length of Ivs . 2-6 in. 26. Garryana 



27. lobata 

 FF. Under side of Ivs . 



glabrous 28. alba 



BE. Bark furrowed and 

 ridged, not scaly, usu- 

 ally dark brown or 

 dark gray. European 



pedunculata 

 sessiliflora 



lanuginosa 



Toza 



conferta 



Cerris 



Suber 



Ilex 



Virginiana 



chrysolepis 



agrifolia 



densiflora 



F. Cup with imbricate, ap- 



pressed scales. 

 G. Lvs. glabrous beloiv.29. 

 30. 



GG. Lvs. pubescent be- 

 low 31. 



32. 

 33. 



FF. Cup with elongated, 

 spreading and re- 

 curved scales 34. 



CC. Foliage evergreen, dentate or 



entire. 



D. Lvs. whitish, tomentose or 

 tomentulose beneath: fr. 

 ripening the first year.. 35. 

 36. 

 37. 



DD. Lvs. soon glabrous beneath.38. 



39. 



AA. Staminate catkins erect, partly 

 androgynous, with the pistillate 

 fls. at the base. Pasania... ...40. 



1. palustris, Linn. PIN OAK. Plate XXI. Figs. 150o, 

 2043. Tree, to 80, occasionally 120 ft., with rather short 

 spreading branches, forming a symmetrical pyramidal 

 head, becoming irregular and oblong in older trees: 

 Ivs. deeply pinnatifid, sometimes almost to the midrib; 

 lobes 5-7, oblong or .oblong-lanceolate, toothed, sepa- 

 rated by wide sinuses, bright green above, light green 

 beneath, with axillary tufts of hairs, 3-5 in. long: fr. 

 short- stalked; acorn subglobose or ovoid, %-% in. long, 

 embraced about one-third or more by the cup. Mass, to 

 Del., west to Wis. and Ark. S.S. 8:422,423. Em. 1:167. 

 A.G. 17:213. Gng. 3:129. Mn. 2:155; 6:27. -Handsome 

 tree, especially when young; often used for avenues; 

 grows rapidly and prefers somewhat moist soil ; foliage 

 bright red in fall. The tree is fibrous-rooted and trans- 

 plants well. 



2. rubra, Linn, (Q. ambigua, Michx.). Fig. 2041. 

 (4). Tree, to 80, occasionally 150 ft., with stout spread- 

 ing branches forming a broad, round -topped, symmetri- 

 cal head: Ivs. divided about half way to the middle by 

 wide sinuses into 7-9 triangular-ovate or ovate-oblong 

 lobes, dull green above, light green and pubescent at 

 first beneath, at length glabrous, 5-9 in. long: fr. short - 



macrocarpa 



lyrata 



stellata 



2042. Acorns of Quercus coccinea (on left) and Quercus 

 velutina. Natural size. 



stalked; acorn ovoid, 1 in. long, embraced only at the 

 base by the %-l in. broad cup. Nova Scotia to Fla., 

 west to Minn, and Tex. S.S. 8:409, 410. Em. 1:168. 

 F.S. 17:1812-1813 -Beautiful Oak of rapid growth, 

 growing into a large, majestic tree, with usually broad, 

 round head, the foliage turning dark red in fall. 



3. Texana, Buckl. TEXAN RED OAK. Tree, attaining 

 200 ft., with an oblong open head: Ivs. almost like those 

 of Q. coccinea, with axillary tufts of ferrugineous hairs 



