200 REPORT OF THE DEPARTMENT OF BOTANY OF THE 
tion were February 15, March 25, and April 10. ,Live dodder was 
found each time. Some dodder-infested weeds transplanted from 
the field to the greenhouse on April 10 proved to be daisy fleabane 
(Erigeron annuus). The dodder in this field was Cuscuta epithy- 
mum as determined from flowering specimens. 
Field No. 3.— This field, also near Geneva, was one year old. 
The soil was sandy loam and the exposure a northerly one. April 
20, 1900, live dodder was found here in abundance on alfalfa, yel- 
low trefoil and red clover. 
Field No, 4.— This field was located near Syracuse on clay loam 
with a south exposure. It was two years old and contained numer- 
ous large dodder spots. On April 24, 1906, three specimens of live 
codder were found. When another examination was made May 7 
several additional specimens were found, but it was evident that 
most of the dodder in this field had winterkilled. Three of the 
mest vigorous dodder specimens found here were on some weed. 
In order to learn the name of the weed one specimen was trans- 
planted into the Station greenhouse. When it bloomed it was de- 
termined as Erigeron annuus (daisy fleabane). Subsequently, this 
determination was verified by Prof. W. W. Rowlee who states that 
his observations on this species lead him to believe that itis a 
biennial in this latitude. 
Flowering specimens obtained from Field No. 4 showed the dod- 
der to be Cuscuta epithymum. 
Field No. 5.— This field was located at Bergen. It was sown in 
the spring of 1904. During 1905 two crops of hay were cut and 
then cattle were turned on to kill out the dodder, if possible, by 
close pasturing. Although the field was in an exposed situation and 
went into the winter close-cropped it was an easy matter to find live 
dodder in it the following spring (April 30, 1906). Flowering 
specimens of Cuscuta epithymum were taken from this field in 
August. 
While in all of the above observations the appearance of the dod- 
der was such that there seemed no reason to doubt that it was really 
alive and capable of further growth it was thought best to place the 
matter beyond all doubt by forcing the hibernating threads into 
growth. This was accomplished several times by placing the dod- 
der-infested crowns in a moist chamber for a few days. Given 
warmth and moisture the dodder threads began to lengthen 
promptly. In six such experiments the dodder-infested crowns 
were placed in contact with thrifty young alfalfa plants growing in 
