214 Proceedings of Indiana Academy of Science 



No plant has been found, so far as known to the writer, producing 

 seed in Indiana." On the other hand, Watts states that under Tennessee 

 conditions each garlic head usually contains about six flowers each of 

 which produces from three to six seeds, and nearly 100 per cent of the 

 seeds are viable and produce mature plants the season following their 

 formation.^ 



On November 20, 1922, the writer found a number of wild garlic 

 plants in Dubois County, Indiana, that were conspicuous on account of 

 the clusters of flowers formed on each head (fig. 1). An examination 

 of the flowers revealed the presence of seeds, most of which w^ere some- 

 what shriveled although a number of them were plump and appeared 

 to be viable. A dozen of these heads were collected from which slightly 

 over two hundi'ed seeds were secured. 



The seeds were separated into two lots of one hundred each. One 

 lot was tested for germination by the writer, using moistened blotters 

 at ordinary room temperature for the purpose, while the other lot was 

 sent to the Seed Laboratory of the Purdue University Agricultural Ex- 

 periment Station. Germination tests were conducted for periods of 

 thii'ty and thirteen days and in neither case did a single seed germinate. 



These data suggest that the production of seeds by Alluim vineale 

 L. under Indiana conditions is very unusual while the formation of viable 

 seeds either does not occur or is rare. 



RECENT INDIANA WEEDS, 1923.' 



Albert A. Hansen, Purdue University. 



This paper attempts to record the occurrence in Indiana of plants 

 known to have pronounced weedy characteristics and which are new 

 in the state or else have recently developed troublesome tendencies. The 

 present paper is a continuation of the record started in the "Proceedings 

 of the Thirty-eighth Meeting (1922) of the Indiana Academy of Science". 

 It covers the period from October 1, 1922, to October 1, 1923. 



For assistance in verifying identifications thanks are due Dr. B. 

 L. Robinson, of the Gray Herbarium, Dr. John K. Small, of the New 

 York Botanical Garden and Dr. S. F. Blake of the United States De- 

 partment of Agriculture. Specimens of the plants listed have been 

 deposited in the herbarium of the Purdue University Agricultural Ex- 

 periment Station. 



Fanweed. — Thlaspi arvense L. This is one of the most feared of 

 grainfield weeds in Minnesota, North and South Dakota, Colorado and 

 throughout the grain-growing sections of western United States and 

 Canada. Fanweed is a European annual that is noted for its prolific 

 seed production and is the subject of several western experiment station 

 bulletins. 



3 Watts, R. L. "The Wild Onion." Tenn. Agr. Exp. Sta. Bui.. Vol. VII, No. 2, 

 1895, p. 31. 



^' Contribution from the Botanical Department (Extension Division) of the Purdue 

 University Agricultural Experiment Station. 



