144 THE AMERICAN MIDLAND NATURALIST. 
Ophioglossaceae.. Adder’s-tongue Family. 
Botrychium virginianum (1L,.) Sw. MOON WORT. 
_ Woods. Occasional. 
Polypodiaceae. Fern Family. 
Dr yopteris cristata (1,.) A. Gray. SHIELD FERN. 
Woods. Occasional. 
Matteuccia struthiopteris (L.) Tod. OSTRICH FERN. _ 
Woods of Red and Sheyenne rivers. Occasional. 
Equisetaceae. Horse-tail Family. © 
Equisetum arvense L. +> ~ HORSETSIL. 
Bolley in 1892. 
Equisetum pratense Whrh. 
Riverbank. Frequent. 
Equisetum hyemale I,. SCOURING RUSH. 
Low places and in gravel along roadsides. Frequent. 
Lycopodiaceae. Club Moss Family. 
Lycopodium complanaium LL. CLUB MOSS 
A specimen said to have been collected in woods along the Shey 
enne river, but I think there must be some error in the record. 
A few records of cultivated plants have been kept, and 
some of native species not found in the Fargo region. The 
latter are often of only a single season and were taken at 
various places in the state. In a few cases such data have 
been used in the preceding list. In the following list where 
the locality is not given, the east central part of the state is 
the source of the record. 
CULTIVATED PLANTS 
Acer saccharinum L. SILVER MAPLE. Apr. 10 (10). 
Betula papyrifera Marsh.. PAPER BIRCH. May 10. 
Caragana arborescens Lam. SIBERIAN PEA-TREE. May 20 (21). 
Crocus vernus All. Crocus. May 10 (8); excluding the ex- 
tremely early record of March 21, 1910. 
-Eleagnus argentea Pursh. SILVERBERRY. Wild Olive. May § 30. 
Hippophae rhamnoides L. SEA THORN. May 15. 
Juniperus virginiana L. RED CEDAR. May 5. 
Lipidium draba L. HOARY CRESS. PERENNIAL PEPPERGRASS. 
June 10 (11). 
