Edward Lee Greene,
Utah, Arizona, New Mexico; U.S.A., Northern Mexico
||Paper Daisy, Whitestem
Riddellia cooperi, A. Gray, 1868
This member of the
Asteraceae family was given this name in 1891 by Edward Lee Greene. It is found in
the U.S.A. and Northern Mexico, growing in a well drained soil with some
water and lots of sun. The caudex will grow to three centimetres,
and the plant to 50 centimetres. The flowers are yellow, and the
plant can only be reproduced by seeds.
The genera name from the Greek
psilo; 'naked' and trophe; 'loving' or 'to turn'. The
species name after Dr. James G. Cooper, 19th century geologist.