JUGLANDACEAE OF THE UNITED STATES. 31 
Lign. 42.— Hartig, Bot. Zeit. 1859, 106.— Houlbert, 7. c. 
156, 159, 163, 176.— Lecomte, Ann. Sec. nat. 7 ser. 
x. 218.— Mueller, Rinde Laubholz. 7.— Solereder, Holz- 
structur, 245. 
J. cinerea. 
Winter Characters. 
Beal, Amer. Naturalist, 1881. 36, fig.— Bésemann, J. c. 
60.— Brendel, 7. c. pl. 2, f. 17.— Powell, Amer. Gard. 
xiii. 708, fig. 
Histological Characters. 
Gnetzsch, J. c.19.— Gris, Moelle Pl. Lign. 278; Extr. 
Moelle Pl. Lign. 21, pl. 6, f. 5. Hough, Amer. Woods, 
i. 14 (3 wood sections).—Houlbert, 7. c. 159.—Dawson, 
Amer. Journ. Pharm. xlvi. 167. 
J. nigra. 
Winter Characters. 
Beal, 7. c. 36, fig.— Brendel, 7. c. pl. 2, f. 18.—D6ll, 7. c. 
21.— Feist, 7. c. 327.— Hitchcock, Pl. Manhattan, 17; Key 
to Kas. Trees, 4, f. 13; Opening of Buds, 138, f. 99-101.— 
Rothrock, Forest Leaves, iv. 38-40, fig.— Schwarz, Forstl. 
Flora, 431. 
Histological Characters. 
Brooks, Wood Sects. 9 (3 wood sections).— Gerber, 
Jahrl. Korkproduction, 27.— Gnetzsch, 1. c. 19. — Hartig, 
Unterscheidungsmerkmale, 2 ed. 28; Engl. transl. 51. — 
Hough, Amer. Woods, ii. 35 (3 sects. ).— Houlbert, J. c. 
160.— Koeppen, Verhaltn. d. Rinde uns. Laubbiume, pl. 
21, f. 8, 16a.— Moeller, Anat. Baumrinden, 309, fig.— 
Nordlinger, Anat. Merkmale Wald- u. Gartenholzarten, 
11.— Potonié, Sitzber. Bot. Ver. Prov. Brandenb. xxii. 81. 
— Tolman, Amer. Monthly Micr. J. xi. 55, f. 9.— Troschel, 
Mestom im Holze der dikot. Laubbiume. Diss. 1879, 19. 
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