206 MISSOURI BOTANICAL GARDEN. 
Wiucox, T. E. & A. Woop. Catalogue of plants collected in northwest 
Texas near the headwaters of Red River, by First Lieut. E. H. Ruffner, 
U. S. Engineers 
Rep. Chief of Eng., U. S. A., 1877. App. RR. pp. 1422-1426. Wash- 
ington. 
Wisuizenus, A. Memoir of a tour to northern Mexico, connected with 
Col. Doniphan’s expedition in 1846-47. Washington. 1848. , 
(Also a German translation by George M. von Ross. Braunschweig. 
1850). 
Wooton, E. O. Southwestern localities visited by Charles Wright. 
(Useful to fix his Texas localities). 
Bull. Torr. Bot. Club. 33: 561-566. 1906. 
Youne, M. J. Familiar lessons in botany with flora of Texas, adapted to 
general use in the southern states. New York. 1873. 8vo. 646 pp. 
Zon, RapHaret. Loblolly pine in eastern Texas, with special reference 
to the production of cross-ties. 
Bull. No. 64. U.S. For. Serv. Washington. 1905. 53 pp. 6 pl. 
In the preparation of this paper I have also had access to 1. An un- 
published MS. containing Gray’s notes on Scheele’s ‘‘Flor von Texas.” 
No date. 2. The unpublished letters of Dr. Gray to Dr. Engelmann. 
1840-1883. 3. Numerous letters from members of Lindheimer’s family 
and others, relating to his life and work. 4. Various newspaper articles 
and clippings relating to the same, including Lindheimer’s Riickblicke 
auf das Entstehen und Leben der Neu Braunfelser Zeitung.” (June 21, 
1872). 
