1478 



QUERCUS 



A. 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: hark 

 dark-colored , not scaly. Black 

 Oaks. Melanobalanus. 

 C. 1/vs. pinnatifid, slender- 

 stalked. 

 D. Lobes of Ivs. tisually 

 tooth ed : binder side 

 glabrous or rarely pu- 

 bescent. 

 E. Ctip shallow, saucer- 

 shaped, broader than 

 high 



QUERCUS 



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

 27. lobata 



3, 

 EE. Cup turbinate or hemi- 

 spherical 4. 



5. 

 G. 



DD. Lobes of Ivs. entire or few- 

 toothed: under side whit- 

 ish or grayish tomentose. 7. 

 8. 

 cc. Lvs. obovate, S-5-lobed at the 

 apex or almost entire, short- 

 stalked 9. 



10. 

 ccc. Lvs. oblong or linear-oblong, 

 entire, rarely remotely 



toothed 11. 



12. 

 13. 

 B. Walls of nut glabrous on the in- 

 ner surface (except Nos. 38, 39) : 

 lvs. siviKitt'lfi lolled or toothed, 

 not bristh'-tippi'd, rarely ser- 

 rate with bristly teeth; the ever- 

 green lvs. sometimes entire: fr. 

 ripening the first year (except 

 Nos. 14, 38, 39 ) . White Oaks. 

 Leucobalanus. 

 C. Foliage deciduous. 



D. Ia's. sinuately dentate or 

 serrate. 

 E. Scales of cup linear or 

 lanceolate, spreading 



and recurved 14. 



15. 

 EE. Scales of cup appressed, 

 imbricate. 

 F. Petioles very short: lvs. 

 cordate at base, al- 

 most sessile 16. 



PF. Petioles rather slender; 

 lvs. cuneate or 

 rounded at the base. 

 G. Lobes of lvs. acute. .17. 

 18. 

 19. 

 GG. Lobes of lvs. 



rounded 20. 



21. 

 22. 

 DD, Lvs. pinnately lobed. 



E. Bark separating in thin 

 scales, light gray or 

 light brown. Ameri- 

 can species. 

 F. Under side of lvs. pu- 

 bescent or tomentose. 

 G. Length of lvs. 5-8 

 in.: lvs. lyrate- 



pinnatifid 23. 



24. 

 25. 



palustris 



rubra 



Texana 



coccinea 



Kelloggii 



velutina 



cuneata 

 ilicifolia 



nigra 

 Marilandica 



Phellos 



imbricaria 



laurifolia 



variabilii 

 dentata 



Mongolica 



glandulifera 



prinoides 



Muhlenbergii 



Micbauxi 



Prinus 



bicolor 



FF. Under side of lvs. 



glabrous 28. 



EE. Park furrowed and 

 ridged, not scaly, usu- 

 a lly dark brown or 

 dark gray. European 

 species. 

 F. Cup with i)nbricate,ap- 

 prefint'd scales. 

 G. Lvs. glabrous below.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. 



alba 



pedunculata 

 sessiliflora 



lanuginosa 



Toza 



conferta 



Cerris 



Suber 



Ilex 



Virginiana 



chrysolepis 



agrifolia 



densiflora 



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: 

 lvs. 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, ^-^2 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 fail. The tree is fibrous -rooted and trans- 

 plants well. 



2. rilbra, Linn. (Q. ambigua, Mlchx.). Fig. 2041. 

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

 ing branches forming a bi'oad. round-topped, symmetri- 

 cal head: lvs. divided about halfway 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. Nutural 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. 

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

 growinj; into a large, majestic tree, with usually broad, 

 round liead, the foliage turning dark red in fall. 



3. TexS,na, Buckl. Texan Red Oak. Tree, attaining 

 200 ft., with an oblong ojx'n head: lvs. almost like those 

 of <^. coccinea, with axillary tufts of ferrugineous hairs 



