Colors

Data mode

Account

Login
Sign up

References

Smith, A.R. 2006a. Heliopsis. In Flora of North America Editorial Committee. 2006c. Flora of North America north of Mexico. Volume 21, Magnoliophyta: Asteridae, part 6: Asteraceae, part 3. Oxford Univ. Press, New York, NY. 616 pp.

Cite as...