2888 



QUERCUS 



slender-stalked. S.S. 8:358. Hybrids of this species 

 with Q. macrocarpa, Q. montana, and Q. steUata are 

 known. S.S. 8:359-61. The hybrid with Q. montana 

 was found in the nursery of John Saul, near Wash- 

 ington, D. C., and has been distributed as Saul's oak 

 (Q. Saulii, Schneid.). 



32. Robur, Linn. (Q. pedunculata, Ehrh. Q. femina, 

 Mill. Q. Robur var. pedunculata, DC.). ENGLISH OAK. 

 Figs. 3314, 3315. Tree, to 120 ft., with stout spreading 

 branches forming a broad round-topped head: Ivs. 

 short-petioled, auriculate at the base, oblong-obovate, 

 with 3-7 rounded lobes on each side, quite glabrous, 

 dark green above, pale bluish green beneath, 23^-5 in. 

 long: fr. 1-7 on slender peduncles; acorn ovate or ovate- 

 oblong, about 1 in. high, embraced about one-third by 

 the hemispherical cup. Eu., N. Afr., W. Asia. G.C. III. 

 24: 201; 25: 168. F.S.R. 2, p. 196. G.W. 13, p. 566. H.W. 

 2:21, pp. 53-5. F.E. 21:100 (pi. 114). More than 40 

 varieties are cult, in European nurseries and collec- 

 tions; some of the most important are the following: 

 Var. Concordia, Schneid. (Q, pedunculata Concdrdia, 

 Kirchn.). Lvs. bright yellow. I.H. 14:537. F.E. 

 13:1296 (pi. 19). Var. cont6rta, Hort. A form with 

 twisted branches and crowded Ivs. of irregular shape; 

 of slow growth. Var. fastigiata, Schneid. (Q. peduncu- 

 lata fastigiata, DC.). With upright branches forming a 

 narrow columnar head. G.C. II. 19:179; III. 41:149. 

 G.W. 15:663. F.E. 13:416 (pi. 3) (as var. Lucom- 

 beana). Of the same habit are var. fastigiata cupres- 

 soides, Hort., with narrower Ivs. Var. fastigiata 

 aureo-punctata with yellowish spotted foliage. Var. 

 fastigiata viridis with Ivs. of darker green. Var. 

 heterophylla, Rehd. (Q. pedunculata heterophylla, 

 Loud. Q. Rdbur var. laciniata, Schneid., var. comp- 

 tonisefdlia, Hort.), with narrow, elongated, slightly or 

 crenately lobed, sometimes almost entire Ivs. Var. 



3319. Acorn of 

 live oak. Quercus 

 virginiana; often known as 

 Q. virens (XY 2 ). No. 40. 



3318. Variation in the leaves of live oak. Quercus virginiana 

 (Nearly natural size). No. 40. 



QUERCUS 



filicifolia, Schneid. (var. asplenifdlia, var. Doumetii, 

 Hort.). Fig. 3316. Lvs. deeply and irregularly divided 

 often almost to the midrib in narrow linear lobes, with 

 crisp margins. G.C. II. 14:632. I.H. 1, black fig., not 

 numbered, opposite pi. 33. R.H. 1894, p. 17. Var. 

 pectinata, Schneid. (Q. Rdbur var. pectinata, Kirchn.). 

 Lvs. regularly pinnately divided nearly to the midrib 

 into linear lobes. Var. pendula, Schneid. (Q. pedun- 

 culata pendula, Loud.). With pendulous branches; a 

 form with more slender and 

 more decidedly weeping 

 branches is var. Dauvessei, 

 Hort. Var. purpurascens, DC. 

 (Q. pedunculata purpurdscens, 

 DC., var. purpurea, Loud. Q. 

 Robur sanguinea, Schneid.). 

 With the Ivs. bright purple 

 when young, becoming almost 

 green at length, or as in the 

 forms distinguished as var. 

 atropurpurea, Schneid., and 

 var. nigra, Hort., the color 

 is more intense and retained 

 through the whole summer. 

 F.S. 17:1783, 1784. There 

 are a number of variegated 

 forms, but of no great orna- 

 mental value; the most often 

 cult, are: dlbo-variegdta, argenteo-margindta, argenteo- 

 picta, aureo-variegata, marmordta, joreauensis maculata, 

 tricolor. Hybrids between this species and the follow- 

 ing occur occasionally in Eu. (Q. rosacea, Bechst. Q. 

 hybrida, Bechst., not Brot.). For a hybrid with Q. mon- 

 tana, see No. 24. 



33. sessiliflSra, Salisb. (Q. sessilis, Ehrh. Q. Robur 

 var. sessiliflora, DC. Q. Robur, Mill., not Linn.). 

 Similar in habit to- the former, but limbs less spreading 

 and head less broad: petioles }/z-%vs\. long: Ivs. 

 rounded or cuneate at base, obovate or obovate-oblong, 

 with 5-9 rounded lobes on each side, somewhat glossy 

 above, pale and glabrous or slightly pubescent on the 

 midrib beneath, 2J^-5 in. long: fr. almost sessile, 

 usually somewhat larger than those of the preceding 

 species. Eu., W. Asia to Persia. H.W. 2:22, pp. 65-7. 

 F.S.R. 3, p. 117. A very distinct variety is var. mes- 

 pilifolia, Dipp. (var. sublobdta, Koch), with almost 

 entire Ivs. H.W. 2, p. 65. Var. laciniata, Koehne. Lvs. 

 deeply lobed with narrow lobes pointing forward. Gt. 

 61, p. 495. Var. aurea, DC. Lvs. yellow while young, 

 changing later to green. Var. purpurea, Dipp. Young 

 Ivs. purple, changing to dark green. Var. Louettei, 

 Kirchn. With pendulous branches and narrow slightly 

 lobed or nearly entire Ivs. Q. sessiliflora is less com- 

 mon in cult, than the preceding species; both are usu- 

 ally called English oak and are sometimes considered 

 varieties of one species. 



34. lanuginosa, Thuill. (Q. pubescens, Willd.). Tree, 

 to 40 ft., but sometimes remaining shrubby: branches 

 tomentose when young: Ivs. pinnately lobed or pinnati- 

 fid, with 4-8 pairs of obtuse or acute lobes, glabrous 

 above, pubescent or tomentose and grayish green 

 beneath, 2-4 in. long: fr. almost sessile; acorn ovoid, 

 Y<Z-\ in. long, inclosed about one-half by the tomentose 

 cup; scales closely appressed. Cent, and S. Eu., W. 

 Asia. H.W. 2:23, pp. 69-71. A very variable species, 

 often shrubby, growing mostly on dry, rocky, and 

 often on limestone soil; the more southern forms 

 of it are tender. Var. Hartwissiana, Dipp. (Q. Hart- 

 wissiana, Hort.). Lvs. small, rather acutely lobed, 

 yellowish tomentose beneath. Var. pinnatifida, Schneid. 

 (Q. pubescens var. pinnatifida, A. Braun). Lvs. deeply 

 lobed. Var. crispata, Beck, is similar but margin 

 more crisp and under side more tomentose. Var. 

 pendula, Jacq. (Q. JEgilops var. pendula and Q. 

 Pseud&gilops pendula, Hort.), with pendulous branches 



