JUGLANDACEAE OF THE UNITED STATES. 29 
Ai, glabra. 
Winter Characters. 
De Candolle, 7. c. 7-8, f. 5-6.— Feist, 7. c. 336.— 
Foerste, Bull. Dennison Univy. i. 30.— Hitchcock, Key to 
Kas. Trees, 6. 
Histological Characters. 
Houlbert, 7. c. 163.— Rothrock, Good and Bad Timber, 
f. c-d. 
H glabra, microcarpa. 
Winter Characters. 
Bailey, Amer. Gard. xi. 381, 385-8.— Foerste, Bull. 
Dennison Univy. i. 30. 
Histological Characters. 
Hough, Amer. Woods, iv. 91 (3 sects. wood). 
H. laciniosa. 
Winter Characters. 
DeCandolle, 7. c. 7, 8.— Foerste, Bull. Denn. Univ. i. 
30.— Hitchcock, Key to Kas. Trees, 6. 
Histological Characters. 
Houlbert, 7. c. 162. 
Hl. minima. 
Winter Characters. 
Brendel, J. c. pl. 2, f. 22.— De Candolle, 7. ¢. 7-8.— 
Feist, 7. c. 328.— Foerste, Bull. Denn. Univ. i. 30.— 
Hitchcock, Key to Kas. Trees, 6, f. 16-17; Opening of 
Buds, 138, f. 102-3; Plants of Manhattan, 18. 
Histological Characters. 
Gnetzsch, Radiale Verbindungen der Gefisse. Dissert. 
1888, 19.— Gris, Moelle des Plantes Ligneuses, 279; Extr. 
Moelle Pl. Lign. 31, pl. 6, f. 7, 7, f. 10.— Hough, Amer. 
Woods, ii. 87 (3 sects. wood).—Kny, Abnormitit in d. 
Abgrenzung der Jahresringe, 4.— Moeller, Anat. Baum-_ 
rinden, 312, with figure. 
