DISTRIBUTION AND GROWTH OF NORTH DAKOTA CUSCUTAE 1 87 
CuscuTA GRONOVii WiUd. Fargo, on Solidago canadensis, Sani- 
cula marylandica, Deringia canadensis, Urtica gracilis and Urticastriim 
divaricatum. 
C. plattensis seems closely related to C. gronovii which it replaces 
west of the Red River valley, according to material at hand. Its 
habitat is the same as that of C. coryli (shrubs and coarse herbs along 
Text figures 9-12 of dry capsules about one-half natural size. (Photo by W 
C. Palmer). 
9. Cuscuta coryli on Medicago sativa. 10. Same on Helianlhus tiiherosus. 
II. Cuscuta plattensis on Aster paniculatus. 12. Cuscuta gronovii. 
river banks, etc.), in fact, the two species were mixed in two sheets 
examined. The corolla lobes of C. plattensis and C. gronovii become 
more widely spreading or reflexed in older stages, so that a cluster of 
flowers is likely to give a somewhat dififerent impression from the 
figures shown. 
The presence of C. coryli on alfalfa has not been reported pre- 
viously and is of special interest. The first record for it was obtained 
in 1914 by planting some seeds taken from a sample of alfalfa said 
