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Grindelia robusta, Nutt. Gum-plant. Herbaceous: lvs. larger and more rigid, broadly cordate-oblong, obtuse: achenes all, or some outer ones, 1-toothed or bordered at the summit.—Flowers throughout the Californian winter. Collected stock is offered.
{{SPlantbox
|familia=Asteraceae
|genus=Grindelia
|species=camporum
|common_name=Great Valley gumplant, Great Valley gumweed
|name_ref=Wikipedia
|habit=herbaceous
|habit_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|Max ht box=60
|Max ht metric=in
|height_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|Max wd box=40
|Max wd metric=in
|width_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|lifespan=perennial, annual
|life_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|exposure=sun
|sun_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|features=flowers
|flower_season=early summer, mid summer, late summer
|flower_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|flowers=orange, yellow
|Temp Metric=°F
|min_zone=8
|usda_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|max_zone=10
|image=Grindelia robusta.jpg
|image_width=200
}}
'''''Grindelia camporum''''' is a species of flowering plant in the [[Asteraceae|daisy family]] known by the common names '''Great Valley gumplant''' and '''Great Valley gumweed'''. It is native to [[California]] and [[Baja California]], where it can be found in a number of habitats. Its range may extend into [[Nevada]]. This hardy plant readily grows in disturbed and altered areas such as ditches and roadsides. It is a gangly weedlike perennial topping two meters in maximum height. Its erect, branching stems are lined with many stiff, wavy-edged, serrated leaves 2 to 3 centimeters long. Atop the stem branches are [[inflorescence]]s of a single large [[Head (botany)|flower head]] up to 3 centimeters wide. The head is a vaguely thistlelike cup of green clawlike [[bract|phyllaries]] that bend downward. The center of the head is filled with yellow disc florets and there are usually many yellow ray florets around the circumference. The flower head fills with a copious white exudate, especially during the early stages of blooming. This plant has a number of historical medicinal uses.
{{Inc|
Grindelia camporum (Grindelia robusta, Nutt). Gum-plant. Herbaceous: lvs. larger and more rigid, broadly cordate-oblong, obtuse: achenes all, or some outer ones, 1-toothed or bordered at the summit.—Flowers throughout the Californian winter. Collected stock is offered.
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==Cultivation==
===Propagation===
===Pests and diseases===
==Varieties==
==Gallery==
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Image:Upload.png| photo 1
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==References==
<references/>
<!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 -->
<!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 -->
<!--- xxxxx *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608 -->
==External links==
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