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IOWA ACADEMY OF SCIENCE 
Erigeron sp. In dry ^onnd, Sisters; one specimen. A form 
resembling E. hispidissimus (Hook.) Piper, but with the 
pubescence short and soft and the rays much narrower. 
Aster campestris Nutt. In meadows, Sisters; apparently not 
common. 
Aster eatoni (Gray) Howell. With the preceding; not very 
common. 
Aster occidentalis Nutt. With the preceding, common. 
Aster sp. With the preceding. 
Machaer anther a sp. Dry ground. Sisters and Bend; not com- 
mon. 
Hemizonella diorandi Gray. A few specimens in rather dry 
ground. Sisters. 
Eriophyllum midtiflorum (Nutt.) Ryd. Infrequent in very dry 
ground. Sisters. 
Eriophyllum lanatum (Pursh.) Forbes. A few specimens in 
dry ground. Bend. 
Chaenactis douglasii (Hook.) H. & A. Very dry ground. Sis- 
ters; apparently scarce. 
Achillea mille folium lanulosa (Nutt.) Piper. Frequent in dry 
ground. Sisters. A densely lanate form. 
Artemisia ludoviciana Nutt. Common in dry ground. Sisters. 
Artemisia tridentata Nutt. Sagebrush was first noted a little 
to the west of Sisters. It steadily increases eastward, and 
a few miles east of Bend, where the yellow pine disappears, 
it becomes the dominant species. ^ 
Tetradymia canescens DC. One specimen on high dry ground. 
Sisters. 
Ariiica sp. In damp meadows. Sisters; scarce. 
Senecio howellii Greene. Common; in dry ground. Sisters and 
Bend. 
Senecio triangidaris Hook. A few specimens on the margin of 
the Des Chutes. It is rather suprising to find this Cana- 
dian and Hudsonian species in this locality. Our material 
represents a very tall and robust form. 
Senecio sp. In rather dry ground. Sisters; one locality. 
Senecio sp. One specimen of a small undetermined species 
found in damp ground. Bend. 
Antennaria geyeri Gray. In moderately dry ground. Sisters; 
scarce. 
Carduus undidatus Nutt. On a rather dry hillside. Bend. 
Willamette University, 
Salem, Oregon. 
