Kienitz, M. Ueber Ausführung von Keimproben. Forst. Fl. 6. Abs. in Bot. Cent. 1:52-53. 1880.

Kinzel, W. Concerning the germination of dodder seed. Naturw. Ztschr. Han.- u. Forstw. 1903: 104-110.

On the germination of half-ripe dodder seed. Landw. Vers. Stat. 55:255-256. Abs. in Exp. Sta. Rec. 13:658.

Kolkwitz, R. Ueber die Athmung ruhenden Samen. Ber. Deutsch. Bot. Gesells. 19:285-287. 1901.

Korsmo, E. On the viability of weed seeds after passing through the digestive tract of farm animals. Tidskr. Norske. handbr. 18:223-230.

Kuntze, R. E. Germination and vitality of seeds. Torrey Bot. Club. 1901.

Lehmann, Ernst. Ueber die Beeinflussung der Keimung lichtempfindlicher Samen durch die Temperatur. Zeits. f. Bot. 4:465529.

Laschke, W. Einige vergleichende Untersuchungen über den Einfluss des Keimbettes, sowie des Lichtes auf die Keimung verschiedener Sämereien. Landw. Vers. 65:295. McCarthy, Gerald. Seed-testing; its uses and methods. Bull. N. C. Agr. Exp. Sta. 108:349-415.

Munerati, O., & Zapparoli, T. V. On investigations on the germination of seeds of some weeds. Staz. Sper. Agr. Ital. 44:40-50 (1911).

Nobbe, F. Handbuch der Samenkunde. 631. Berlin. 1876. On viability of seeds, see Landw. Vers. Stat. 13:233.

Pammel, L. H., Buchanan, R. E., & King, C. M. The vitality, adulteration and impurities of clover, alfalfa, and timothy seed in Iowa in 1906. Bull. Ia. Agr. Exp. Sta. 88:69. Pammel, L. H., and King, C. M. Delayed germination. Proc. Ia. Acad. Sci. 18:20-33.

Results of seed investigations for 1907. Bull. Ia. Agr. Exp. Sta. 99:71-91.

Results of seed investigation for 1908 and 1909. Bull. Ia. Agr. Exp. Sta. 115:156-177.

Pammel, L. H., & Lummis, G. M. The germination of weed seeds. Proc. Soc. Prom. Agr. Sci. 1903: 89-92.

Panton, J. H. Impurities in clover seed. Bull. Ontario Agr. Coll. 98:8; 10 f.

Weeds of Ontario. Rept. Ont. Agr. Coll. & Exp. Farm.

19:27-32.

Parsons, C. L. A summary of American seed tests. Agr. Sci.

7:541-545.

Pieters, A. J. The farmer's interest in good seed. Far. Bull. U. S. Dept. Agr. 111:24.

Red Clover seed. Cir. U. S. Dept. Agr. Div. Bot. 24:5.

Seed of red clover and its impurities. Far. Bull. U. S. Dept. Agr. 260:24.

Testing seeds at home. Rept. U. S. Dept. Agr. 1895: 175-184.

Pieters, A. J., & Brown, E. Kentucky blue grass seed; harvesting, curing, and cleaning. Bull. U. S. Dept. Agr. Bur. Pl. Ind. 19:19.

Ridley, H. N. Dispersal of seeds by birds. Nat. Sci. 8:186-199. Roberts, H. F., & Freeman, G. F. Alfalfa seed; its adulterants, substitutes and impurities, and their detection. Bull. Kan. Agr. Exp. Sta. 133:53-111; 33 pl.

Rolfs, P. H. Preliminary report on the examination of some seeds. Bull. Ia. Agr. Exp. Sta. 13:75-84.

Samek, J. On vitality of seeds. See Tirol. Landw. Blatter. 13. 1894: 161-162. Abs. in Exp. Sta. Rec. 6:429-430.

Settegast. Die landwirthschaftlichen Samereien und der Samenbau. Leipsic, 1892.

Selby, A. D., & Hicks, J. F.

Clover and alfalfa seeds.

Their

purity, vitality, and manner of testing. Bull. Ohio Agr. Exp. Sta. 142:111-130; 4 pl.

Smith, P. H., Chapman, G. H., and Stone, G. E. Notes on seeds, screenings, and weeds in Massachusetts. Rept. Mass. Agr. Exp. Sta. 1908. Pt. 1.

Stewart, F. C. Impurities of clover seed. Bull. Ia. Agr. Exp. Sta. 21:805-815.

Stewart, F. C., & French, G. T. Dodder in alfalfa seed. Cir. N. Y.

Agr. Exp. Sta. 8:4 (n. s.).

Stewart, F. C., French, G. T., & Wilson. Troubles of alfalfa in New York. Bull. N. Y. Agr. Exp. Sta. 305:333-416.

Thornber, J. J. Practical suggestions for seed testing. Bull. Ariz. Agr. Exp. Sta. 54:99-102.

Vandevelde. Die Keimung der zaadplanten Morphologie en Physiologie. Gent. 1896.

Waldron, L. R. Buried weed seeds. Bull. N. D. Agr. Exp. Sta. 62:439-446.

Wollny, E. Saat u. Pflege. der landwirthschaftlichen Kulturpflanzen. Berlin, 1885.

Woods, Chas. D. Testing seeds. Bull. Me. Agr. Exp. Sta. 36:8.

WEED LAWS.

Bolley, H. L. The seed control act. Special Seed Bull. N. D. Agr. Exp. Sta. 1:15.

Burtt-Davy, J. B. Text of law in regard to burweed (Xanthium spinosum). See Far. Bull. Transvaal Dept. Agr. 54.

Clark, G. H. Weed control and weed legislation. Cy. Am. Agr. 4:533-536.

Dewey, L. H. Legislation against weeds. Bull. U. S. Dept. Agr. Div. Bot. 17:60.

Garman, H. and Didlake, M. L. The inspection of seeds under the Kentucky Pure Seed Law. Bull. Ky. Agr. Exp. Sta. 127: 129-169.

Laws of Iowa relating to Agriculture.

9:944-958.

Iowa Yearbook Agr.

Maine law in regard to seeds. An act to regulate the sale of Agricultural Seeds. Rept. Me. Agr. Exp. Sta. 1896: 143-181. Taylor, F. W. Results of seed tests for 1911. (Includes text of seed law.) Bull. N. H. Agr. Exp. Sta. 156:14.

Thistles, illustrated description of, etc., included within the provisions of the Thistle Act of 1890. Victoria Dept. Agr. Tillman, O. I. Purity and germination of agricultural and vege table seeds sold in North Carolina. (Contains seed law.) Bull. N. C. Agr. Exp. Sta. 32:78; pls. 8. f. 2.

GENERAL.

Anderson, L. Weedy flavors in butter. Ann. Rep. Cal. Agr. Exp. Sta. 1902-3: 121-126. Exp. Sta. Rec. 15:813.

Bailey, L. H. Some reflections upon weeds. Bull. Cor. Agr. Exp. Sta. 62:522-526.

Bowen-Jones, J. Influence of weeds on crops. Jour. Roy. Agr. Soc. Eng. 66:122.

Brenchley, W. E. The weeds of arable land in relation to the soil. on which they grow. Ann. Bot. 25:155-165; 26:95-109. Weeds in relation to soils. Jour. Bd. Agr. (London) 18:18-24. 1911.

Weeds; their peculiarities and distribution.
Twentieth Cent. 1912: 413-437.

Sci. Prog.

Carruthers, W.

Determination of weeds. Jour. Roy. Agr. Soc.

Eng. 3:738-742. Jour. Roy. Agr. Soc. 69:313-315.

Cates, J. S., & Cox, H. R. The weed factor in the cultivation of corn. Bull. U. S. Dept. Agr. Bur. Pl. Ind. 257:35.

Dewey, L. H. "Caesar Weed" useful as a fiber plant. See Cyc. of Amer. Agri. 2:285.

Weeds in cities and towns. Yrbk. U. S. Dept. Agr. 1898: 193-200.

Henfrey, Arthur. Outlines of the natural history of Europe. The vegetation of Europe, its conditions and causes. 387. 4 col. tab. 1852.

Halsted, B. D. Our worst weeds, a scale of points. Proc. Soc.
Prom. Agr. Sci. 10:39-43.

Holtz, F. L. Weeds. Nat. Study Rev. 6:237-245. 1910.
Pammel, L. H. A talk on weeds. (Address delivered before
County Road School, Clinton County, Iowa, 1910-with ap-
pendix describing a few weeds.) 54. Ames, 1910.

Weeds of the Farm and Garden. 281, 161 f. Orange Judd & Co., 1911.

Pammel, L. H., & Fogel, E. D. The underground organs of a few weeds. Proc. Ia. Acad. Sci. 16:31-40.

Severance, G. Germination of wheat affected by Russian Thistle in the soil. See Pop. Bull. Wash. Agr. Exp. Sta. 15. Abs. in Exp. Sta. Rec. 21:130.

Shull, C. A. The oxygen minimum and the germination of Xan

thium seeds. Bot. Gaz. 52:453-477.

Stone, A. L. The weed situation. Rept. State Conserv. Com. Wis. 1911: 60-67.

Teindl, J. C. Die Unkrautpflanzen. Vienna, 1827.

Toumey, J. W. Something about weeds. Bull. Ariz. Agr. Exp. Sta. 22:32.

Tronmer. Bonitirung des Bodens. 1853.

Vitek, E. Weed studies. Monatsch. Landw. 3:333-344. 1910. Abs. in Exp. Sta. Rec. 24:543.

Waldron, L. R. Weed Studies. Bull. N. D. Agr. Exp. Sta.

62:449-457.

Weaver, A. T. Farm management and weeds. Farm Weeds. 1909 (Nov.): 1.

Williams, T. L. Some plants injurious to stock. Bull. S. D. Agr. Exp. Sta. 33:21-44.

Wilson, A. D. Cost of weeds to the farmer. See Farm Weeds.

GLOSSARY.

BY HARRIETTE S. KELLOGG.

Accumbent. Lying against, as when the edges of the cotyledon lie against the caulicle or radicle.

Achene. A dry, hard, 1-celled, 1-seeded, indehiscent fruit.
Acuminate. Tapering somewhat gradually to a point.
Acute. Ending in a sharp angle, not prolonged.

Aerial roots. Those appearing on the stem above ground; may be brace roots as in corn, or clinging roots as in ivy.

Albumen. Nutritive material in seeds accompanying the embryo.

Aleurone grains. Protein grains replacing albumen in a few oily seeds, and starch in others.

Aleurone layer. Outer layer of the endosperm next to the peri

sperm.

Alternate (leaves). One at a node, not opposite; (flowers) parts of one whorl opposite to intervals of next.

Anatropous. Inverted and straight.

Angiosperms. Higher seed plants.
Angium. Case for pollen grains.

Annual. A plant that performs its life cycle from germination to matured seed in one season.

Annual (Winter). A plant that germinates in the fall, grows until frost; but blooms and matures seed the following spring. Anther. The part of the stamen which contains the pollen. Apetalous. Without petals.

Apex. Is opposite to point of attachment.

Appressed. Lying flat against.

Arachnoid. Cobwebby; covered with tangled hairs, fewer and longer than when tomentose.

Arrow-shaped. See Sagittate.

Ascending. Rising obliquely or curving upward.

Auricle. An ear-shaped appendage.

Awn. An appendage composed of bristles.

Axil. The upper angle formed between the leaf and stem.
Axis. The central line of any organ or support of a group of

organs.

Axillary. In the axil.

Barbed. With ridged points or short awns usually reflexed.