1722 



JUGLANS 



JUGLANS 



ailantifolia, 10. 

 alata, 12. 

 Allardiana, 10. 

 aspleniifolia, 1. 

 Bartheriana, 1. 

 californica, 4, 5. 

 cathayensis, 8. 

 cinerea, 7. 

 coarctata, 10. 

 corcyrensis, 1. 

 cordiformis, 10. 

 draconis, 8. 

 Duclouxiana, 1. 

 elongata, 1. 



INDEX. 



fertilis, 1. 

 filicifolia, 1. 

 fruticosa, 1. 

 gibbosa, 11. 

 Hindsii, 5. 

 intermedia, 11, 12. 

 laciniata, 1. 

 Lavallei, 10. 

 major, 2. 

 mandshurica, 9. 

 monophylla, 1. 

 nigra, 6. 

 ovoidea, 6. 

 pendula, 1. 



prseparturiens, 1. 

 pyriformis, 11. 

 quadrangulata, 12. 

 quercina, 5. 

 quercifolia, 5. 

 regia, 1. 

 rupestris, 2, 3. 

 Sieboldiana, 10. 

 sinensis, 1. 

 subcordiformis, 10. 

 Torreyi, 2. 

 Vilmoreana, 11. 

 Vilmoriniana, 11. 



4-celled at 



A. Fr. glabrous or finely pubescent, 1-3, 

 the base. 



B. L/te. usually 7-9, almost entire. 



1. regia, Linn. PERSIAN or ENGLISH WALNUT. 

 Round-headed tree, to 70 ft.: Ifts. 5-13, oblong or 

 oblong-ovate, acute or acuminate, almost glabrous, 

 bright green, 2-5 in. long: fr. almost globular, green; 

 nut usually oval, reticulate and rather smooth, rather 

 thin-shelled. S. E. Eu. Himalayas, China. U. S. N. C. 

 pi. 6. H.W. 2:36, pp. 87-9. M.D. 1911, p. 197 (habit). 

 Many varieties are cult, as fr. trees, for which see 

 Walnut. Var. sinensis, DC. (J. sinensis, Dode). Lfts. 

 usually 5, larger, pubescent on the veins below: nut 

 globose-ovoid, very rugose. China, Japan. S.I.F. 2:5. 

 Of the ornamental varieties the most distinct and 

 decorative is var. laciniata, Loud. (var. filicifolia, 

 Hort. var. asplenifolia, Hort.), with narrow, pinnately 

 cut Ifts.; very effective as a single specimen on the 

 lawn; remains usually shrubby. M.D.G. 1908:617. 

 Var. monophylla, DC., has the Ivs. simple or 3-folio- 

 late. Var. pendula, Kirchn., has pendulous branches. 

 Var. fertilis, Kirchn. (var. fruticosa, Dipp. var. prsrpar- 

 titriens, Hort.), is a shrubby variety producing rather 

 small, thin-shelled nuts on very young plants. Var. 

 Bartheriana, Carr. (var. elongata, Hort.). Nut elon- 

 gated, narrow- 

 oblong. R.H. 

 1859, p. 147; 

 1861, p. 427. Gn. 

 50, p. 478. Var. 

 corcyrensis, 

 Sprenger. Lvs. 

 large, to 2 ft. 

 long; Ifts. 9, the 

 lowest pair very 

 small, the upper 

 pairs broadly 

 ovate, about 8 

 in. long and 5 

 in. broad: nut 

 rather thick- 

 shelled. J. Du- 

 clouxiana, Dode, 

 from the Hima- 

 layas and W. 

 China with more 

 elliptic and more 



acuminate Ifts. and nuts with thin fragile shell, is prob- 

 ably only a variety of J. regia. 



BB. Lfts. 9-25. 

 C. Width of Ifts. usually less than 1 in. 



D. Nuts deeply grooved. 

 E. Diam. of nut up to 1% in.: Ifts. 9-13. 



2. major, Heller (J. rupestris var. major, Torr. J. 

 Torreyi, Dode). Tree, to 50 ft., with narrow head: 

 branchlets pubescent while young: Ifts. 9-13, rarely to 

 19, oblong-lanceolate to ovate, acuminate, cuneate or 

 rounded at the base, coarsely serrate, soon glabrous 

 or slightly pubescent on the midrib beneath, 3-4 in. 

 long, the lowest Ifts. lJ^-2 in. long: stamens 30-40: 

 fr. subglobose or ovoid, 1-1 Yi in. across, covered with 



2012. Pistillate flowers of Juglans cinerea. 



(Natural size.) 



2013. Juglans mandshurica. 



(Natural size.) 



a close rufous tomentum; nut dark brown or black, 

 slightly compressed, with broad deep longitudinal 

 grooves, with a thick shell and small sweet kernel New 

 Mex., Ariz., Colo. S.S. 7:336. 



EE. Diam. of nut not more than Yin.: Ifts. 11-23. 



3. rupestris, Engelm. Shrub or small tree, rarely to 

 30 ft.: branchlets pubescent when young: Ifts. 17-23, 

 narrow-lanceolate, acumi- 

 nate, finely serrate or nearly 



entire, puberulous or pube- 

 scent when young, at 

 maturity quite glabrous or 

 pubescent on the midrib 

 beneath, 2-3 in. long: sta- 

 mens about 20; ovary 

 pubescent or tomentose: fr. 

 globular, rarely ovoid, often 

 pointed, usually pubescent, 

 M~/4in- across; nut with 

 deep longitudinal grooves, 

 thick-shelled, with small 

 kernel. Texas and N. Mex. 

 S.S.7:335. G.W. 11, p. 399. 



4. californica, Walt. 

 Shrub or tree, 12-20, rarely 

 40-50 ft. high: branchlets 



puberulous: petioles glandular-pubescent; Ifts. 11-15, 

 rarely to 19, oblong-lanceolate, usually acute, or acumi- 

 nate, cuneate or rounded at the base, glabrous, 1-2^ 

 in. long: stamens 30^40: fr. globose, }4-%m. across, 

 puberulous, husk thin; nut nearly globose with deep 

 longitudinal grooves. S. Calif. S.S. 7:337, figs. 1-4. 



DD. Nut obscurely or not at all grooved, up to 2 in. across. 



5. Hindsii, Sarg. (J. californica var. Hindsii, Jepson). 

 Rounded-headed tree, 30-40, occasionally to 75 ft. 

 high, with tall trunk: branchlets densely pubescent at 

 first: petioles villous; Ifts. 15-19, usually 19, ovate- 

 lanceolate to lanceolate, long-acuminate, usually 

 rounded at the base, coarsely serrate, pubescent 

 beneath on the midrib and veins, 2%-4 in. long: 

 stamens 30-40: fr. globose, 1^-2 in. across, soft- 

 pubescent; nut nearly globose, faintly grooved, with 

 thick walls. Cent. Calif. S.S. 7:337^ figs. 5-8. Gn. 

 49, p. 278. A graceful ornamental tree often planted 

 as a street tree in Calif, and used as stock for grafting 

 varieties of the English walnut. The nut is of good 

 quality, but rather small. Var. quercina, Sarg. (/. 

 californica quercina, Babcock. J. quercifolia, Pierce). 

 An abnormal form with 1-5 Ifts., usually 3, short- 

 stalked or sessile, broadly ovate to oblong, obtuse or 

 emarginate, serrate or entire, %~2 in. long. Jepson. 

 Silv. Calif., pp. 51-3. 



cc. Width of Ifts. 1 in. or more: nut prominently and 

 irregularly ridged. 



6. nigra, Linn. BLACK WALNUT. Fig. 2011. Lofty 

 tree, to 150 ft., with rough brown bark and pubescent 

 branchlets: Ifts. 15-23, oblong-lanceolate, acuminate, 

 appressed-serrate, glabrous and somewhat shining above 

 at length, pubescent beneath, 3-5 in. long: fr. usually 

 1-3 on a short stalk, 1^-3 in. across, with papillose 

 surface; nut thick-shelled, globular or somewhat 

 depressed, strongly ridged. Mass, to Fla., west to 

 Minn, and Texas. S.S. 7:333, 334. Em. 211. G.C. II. 

 11:373; 26:617; 111.30:303. F.S.R. 3:210. H.W. 

 2, p. 182. U. S. N. C. 7, pp. 1-3. Gn. 27, pp. 269, 270. 

 J. ovoidea, Dode, is a form with ovoid pointed nuts. 



AA. Fr. coated with viscid hairs, racemose; nut 2-celled at 

 the base: Ifts. with stellate and glandular pubes- 

 cence beneath, serrate. 



B. Nut strongly 6-8-ridged. 



7. cinerea, Linn. BUTTERNUT. WHITE WALNUT. 

 Fig. 2012. Large tree, occasionally to 100 ft., with 



