Part 33

Wych-hazel. See Witch-hazel 27-28

Xanthoxylum, X. americanum, X. carolinianum, X. clava-herculis, and X. fraxineum. See Ash, prickly 31-33

Yellowroot. See Bittersweet, false 36

Yellowthorn. See Ash, prickly 31-33

Yellowwood, prickly, and West Indian. See Ash, prickly 31-33

BULLETINS OF THE BUREAU OF PLANT INDUSTRY.

The scientific and technical publications of the Bureau of Plant Industry, which was organized July 1, 1901, are issued in a single series of bulletins, a list of which follows.

Attention is directed to the fact that the publications in this series are not for general distribution. The Superintendent of Documents, Government Printing Office, Washington, D. C., is authorized by law to sell them at cost, and to him all applications for these bulletins should be made, accompanied by a postal money order for the required amount or by cash. Numbers omitted from this list can not be furnished.

No. 1. The Relation of Lime and Magnesia to Plant Growth. 1901. Price, 10 cents.

2. Spermatogenesis and Fecundation of Zamia. 1901. Price, 20 cents.

3. Macaroni Wheats. 1901. Price, 20 cents.

4. Range Improvement in Arizona. 1901. Price, 10 cents.

6. A List of American Varieties of Peppers. 1902. Price, 10 cents.

7. The Algerian Durum Wheats. 1902. Price, 15 cents.

9. The North American Species of Spartina. 1902. Price, 10 cents.

10. Records of Seed Distribution, etc. 1902. Price, 10 cents.

11. Johnson Grass. 1902. Price, 10 cents.

12. Stock Ranges of Northwestern California. 1902. Price, 15 cents.

13. Range Improvement in Central Texas. 1902. Price, 10 cents.

15. Forage Conditions on the Border of the Great Basin. 1902. Price, 15 cents.

17. Some Diseases of the Cowpea. 1902. Price, 10 cents.

20. Manufacture of Semolina and Macaroni. 1902. Price, 15 cents.

22. Injurious Effects of Premature Pollination. 1902. Price, 10 cents.

24. Unfermented Grape Must. 1902. Price, 10 cents.

25. Miscellaneous Papers. 1903. Price, 15 cents.

27. Letters on Agriculture in the West Indies, Spain, etc. 1902. Price, 15 cents.

29. The Effect of Black-Rot on Turnips. 1903. Price, 15 cents.

31. Cultivated Forage Crops of the Northwestern States. 1902. Price, 10 cents.