View source for Symphytum asperum

{{SPlantbox
|familia=Boraginaceae
|genus=Symphytum
|species=asperum
|common_name=Prickly comfrey
|name_ref=Flora - A Gardener's Encyclopedia
|habit=herbaceous
|habit_ref=Flora - A Gardener's Encyclopedia
|Min ht box=4
|Min ht metric=ft
|Max ht box=5
|Max ht metric=ft
|height_ref=Flora - A Gardener's Encyclopedia
|Min wd box=5
|Min wd metric=ft
|Max wd box=7
|Max wd metric=ft
|width_ref=Flora - A Gardener's Encyclopedia
|exposure=sun
|sun_ref=Flora - A Gardener's Encyclopedia
|features=flowers
|flower_season=early summer, mid summer, late summer
|flower_ref=Flora - A Gardener's Encyclopedia
|flowers=red, pink
|Temp Metric=°F
|min_zone=5
|usda_ref=Flora - A Gardener's Encyclopedia
|max_zone=10
|image=Symphytum asperum bloemen.jpg
|image_width=240
}}
'''''Symphytum asperum''''' is a [[flowering plant]] of the genus ''[[Symphytum]]'' in the family [[Boraginaceae]].

Common names: Rough Comfrey, Prickly Comfrey.

{{Inc|
Symphytum asperum, Lepech. (S. asperrimum, Donn). Prickle Comfrey. Perennial, 2 1/2 - 5 ft. or even more high: root thick: st. branched, uncinate: lvs. hispid or prickly on both surfaces, ovate or elliptical, acuminate; lower petioled base cordate or rotundate upper subpetioled, base cuneate: fls. at first rose then blue, smaller than those of S. officinale. Russia, Caucasus, Persia. B.M. 929.—Has some forage value. There are horticultural forms with yellow-variegated or -margined lvs. known as S. asperrimum aureo-variegatum, and S. asperrimum var. variegatum.
{{SCH}}
}}

==Cultivation==


===Propagation===


===Pests and diseases===


==Varieties==


==Gallery==
<gallery perrow=5>
File:Symphytum asperum plant.jpg| photo 1
File:Symphytum asperum stengel.jpg| photo 2
Image:Upload.png| photo 3
</gallery>

==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==
*{{wplink}}

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