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  1. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 13
    Issue: 2
    Date: 1987-04
    Page Range: 1--8
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  2. By: Roberts, Fred M. - White, Scott D - Sanders, Andrew C. - Bramlet, David E.
    Type: Article
    In: Crossosoma
    Volume: 33
    Issue: 2
    Date: 2007
    Page Range: 55--69
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  3. By: Roberts, Fred M. - Columbus, J. Travis
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 55
    Date: 2008
    Page Range: 90--91
    Publication Info: Berkeley, California Botanical Society,
  4. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 36
    Issue: 1
    Date: 2010
    Page Range: 7--20
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  5. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 12
    Issue: 1
    Date: 1986-02
    Page Range: 1--16
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  6. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 40
    Issue: 2
    Date: 2014
    Page Range: 99--99
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  7. By: Harrison, James E - Erickson, Richard A. - Banks, Darin L - Boyd, Steve, - Mansfield, Donald H - Zika, Peter F. - Wilson, Barbara - Roberts, Fred M.
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 45
    Date: 1998
    Page Range: 85--87
    Publication Info: Berkeley, California Botanical Society,
  8. By: Roberts, Fred M. - Fletcher, Grant - Boyd, Steve, - Sanders, Andrew C. - Lesica, Peter - Husby, Peter - Cooper, Stephen V. - Kuijt, Job
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 45
    Date: 1998
    Page Range: 326--330
    Publication Info: Berkeley, California Botanical Society,
  9. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 16
    Issue: 2
    Date: 1990-04
    Page Range: 3--12
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  10. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 42
    Issue: 2
    Date: 2016
    Page Range: 51--86
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  11. By: Roberts, Fred M.
    Type: Article
    In: Crossosoma
    Volume: 38
    Issue: 2
    Date: 2012
    Page Range: 37--84
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  12. By: Roberts, Fred M. - Bramlet, David E.
    Type: Article
    In: Crossosoma
    Volume: 33
    Issue: 1
    Date: 2007
    Page Range: 2--38
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,