JUGLANDACEAE Or THE UXITED STATES. 31 
Lign. 42.— Hartig, Bot. Zeit. 1859, 106.— Houlbert, I. c. 
156, 159, 163, 176.— Lccomte, Ann. Sc. nat. 7 ser. 
X. 218.— Mueller, Einde LcUibholz. 7.— Solereder, Holz- 
»tructur, 245. 
J. cinerea. 
Winter Characters. 
Beal, Anier. Naturalist, 1881. 36, fiir— Rosomaiin, /. c. 
60.— Brondd, /. r. pi. 2, f. 17.— Pcu t-ll, Anier. Gard. 
xiii. 708, fig. 
Histological Chara. tcrs. 
Gnetzs<-h. /. c. li>.— Oris, Moellc PI. Lign. 278; Extr. 
Moelle PI. Lign. 21, pl. 6, f. 5.— Hough, Amer. Woods, 
i. 14 (3 wood sections).— Houlbert, I. c. 159.— Dawson, 
Amer. Journ. Pharra. xlvi. 167. 
J. nigra. 
Winter Characters, 
Beal, I. c. 36,tig.— Brendel, J. c. pl. 2, f. 18— Doll,?, c. 
21.— Feist, 327.— Hitchcock, Pl. Manhattan, 17; Key 
to Kas. Trees, 4, f . 13 ; Opening of Buds, 138, f . 99-101.— 
Eothrock, Fore>t Leaves, iv. 38-40, fig.— Schwarz, Forstl. 
Flora, 431. 
Histological Characters. 
Brooks, Wood Sects. 9 (3 wood sections ).— Gerber, 
Jahrl. Korkproduction, 27.— Gnetzsch, L c. 19. — Hartig, 
Unterscheidungsuierkmale, 2 ed. 28; Engl, transl. 51.— 
Hough, Amer. Woods, ii. 35 (3 sects. ).— Houlbert, /. c. 
160.— Koeppea, Verhiiltn. d. Einde uns. Laabbluii>H'. pi. 
21, f. 8, 16a.— Moeller, Anat. Baumriudeu, ooy, iig,— 
Nordlinger, Anat. Merkmale Wald- u. Gartenholzaiten, 
11. — Potonie, Sitzber. Bot. Ver. Prov. Brandenb. xxii. 81. 
— Tolman, Amer. Monthly Micr. J. xi. 55, f . 9.— Troschel, 
Mestom im Holze der dikot. Laubbanme. Diss. 1879, 19. 
