1478 



QUKECUS 



Staminate catkins .ilender, pendu- 

 lous : pistillate fls. in separate 

 iij-illary spikes (For aa, see spe- 

 cies No. 40). Lepidobalanus. 

 B. Walls of nut tomentose on the 

 inner surface: Irs. lobed, with 

 hristle-tipf, d I, , II, ,i ,id lobes or 

 entire, h>-ixt!;i-iii,i,ilrd, Imt not 



ripening thr sr,;,„il y,ar: hark 

 dark-colortd, md stuli/. Black 

 Oaks. Melanohalauus. 

 o. Lvs. pinnatifid, slender- 

 stalked. 

 D. Lobes of lvs. usually 

 toothed : under side 

 glabrous or rarely pu- 

 bescent. 

 E. Cup shallow, saucer- 

 shaped, broader than 

 high 1. palnstris 



2. rubra 



3. Tezana 

 EE. Cup turbinate or hemi- 



spherica I 4. coccinea 



5. Kelloggii 

 U. velutina 



DD. Lobes of h'S. entire or feiv- 

 loothi.l: ,n„l,r si, I, irhit- 



ish ,.r ,i,:n,,.:l, t:.„i. hIosv. 7. cuneata 

 8. ilicifolia 



CC. Lvs. ohorafr. .:-.-,- I„I„',J „t the 

 apex or almost entire, short- 

 stalked 9. nigra 



10. Marilandica 

 ceo. Lvs. oblong or linear-oblong, 



toothed ". '.II. Phellos 



12. imbricaria 



13. laurifoUa 



IB. Walls nf nat qiahrnas ni, the in- 



;„,N„,-A,r, 'i,.v,^.i.tN..-,:i8,,S9): 



1,-s. sn,>,„hhi l..h.,l <,rt,H,lhed, 



fvs. sinuately dentate or 

 serrate. 



Scales of cup linear or 

 lanceolate, spreading 



and recurved 1' 



li 

 Scales of cup oppressed, 

 imbricate. 

 F. Petioles rery short: lvs. 

 cnrilale at base, al- 



QtTBBCUS 



GG. Length Of lvs. S-6 in. 26. Garryana 

 27. lobata 

 FP. tinder side of lvs . 



glabrous 28. alba 



ZK. Bark furrowed and 

 ridged, not scaly, usu- 

 ally dark brown or 

 dark gray. European 

 species. 

 F. Cup with imbricate, ap- 

 pressed scales. 

 G. I/vs. glabrous below.29. pedunculata 

 30. sessiliJlora 

 GG. Zn^s. pubescent be- 



lotv 31. lanuginosa 



32. Toza 



33. conJerta 

 FF. Cup with elongated, 



spreading and re- 

 curved scales 34 . Cerris 



CC. Foliage evergreen, dentate or 



D. Lvs. whitish, tomentose or 

 lomentulose beneath: fr. 

 ripening the first year. a.'i. Suber 

 :«;. Ilex 



Virginiana 

 chrysolepis 

 agriiolia 



DD. Lvs. soon glabrous beneath .Jb. 

 39. 

 laminate catkins erect, partly 

 androgynous, with the pistillate 

 fls. at the base. Pasania 40. 



densiflora 



1. paliiBtris, Linn. Pis Oak. Plate XXI. Figs. 150o, 

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

 spreading branches, forming a symmetrical pyramidal 

 head, becomius irregular and oblong in older trees: 

 lvs. deeply pinuatifld, sometimes almost to the midrib; 

 lobes .i-7, oiilong or oblong-lanceolate, toothed, sepa- 

 rated by wide sinuses, bright (rn-eii abuve. light green 

 beneath, with axillary tufts ■ if li:nr-, :; ,' in. i..im': fr. 



short-stalked; acorn subglol"- ! ' ' in. l-.n^-. 



embraced about one-third or r I M:i-- t.i 



Del., west to Wis. and Ark. s- ,__ ;_ l.ju lli.T. 

 A.G. 17:213. Gng. 3:129. Bin. J . l.V,. i,.j;. -UainLsMme 

 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. riibra, Linn. (Q. ambigua. Michx.). Fig. 2041. 

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

 ing itranches forming a broad, 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- 



i rather slender; 



glandulifera 



prinoides 



Huhlenbergii 



DD. Lvs. pinnately lobed. 



E. Bark separating in thin 

 .leales, light gray or 

 light brown. Ameri- 

 can species. 

 F. Under side of lvs. pu- 

 bescent or tomentose. 

 O. Length of lvs. 5-8 



pinr. 



itid . 



.23. macrocarpa 



24. lyrata 



25. stellata 



ft) and Quercua 



Stalked; acorn ovoid, 1 In. long, embraced only at the 

 base bv the %-\ 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. Tez&na, Buckl. Texan Red Oak. Tree, attaining 

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

 of §. coccinea, with axillary tufts of ferrugineous hairs 



