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Common name: spiny bear’s-breeches
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Tall herbaceous plant differering from A. mollis in deeply pinnatifid leaves with spinose teeth, bracts and calyx teeth with spinose tips.
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A. mollis has leaves less deeply divided without spinose teeth, bracts and calyx teeth are are not spinose, calyx lobes hairy along margin
In both A. montanus and A. spinosus (syn: A. spinosissimus) the leaf lobes and bracts are spinose.
In A. montanus leaves are glossy green above, less deeply pinnatifid;
In A. spinosus the leaves are rigid, leathery, deeply pinnatifid with rigid spinose teeth
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Images by Gurcharan Singh (Inserted by J.M.Garg)

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Acanthaceae week: Acanthus spinosus from California: Acanthus spinosus L., Sp. Pl. 639 1753. (Acanthaceae)
syn: Acanthus spinosissimus Pers.; Acanthus spinulosus Host; Acanthus caroli-alexandri Hausskn.
Tall herbaceous plant differering from A. mollis in deeply pinnatifid  leaves with spinose teeth, bracts and calyx teeth with spinose tips.

Photographed from University of California Botanical Garden in June, 2008
Common name: spiny bear’s-breeches


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Flowers from California 3: Acanthus spinosus: Acanthus spinosus L., Sp. Pl. 639 1753.  (Acanthaceae)
syn: Acanthus spinosissimus Pers.; Acanthus spinulosus Host; Acanthus caroli-alexandri
Hausskn.
Tall herbaceous plant differering from A. mollis in deeply pinnatifid  leaves with spinose teeth, bracts and calyx teeth with spinose tips. 
Photographed from University of California Botanical Garden in June, 2008
Common name: spiny bear’s-breeches

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Acanthus spinosus L., Sp. Pl. 639 1753.  (Acanthaceae)
syn: Acanthus spinosissimus Pers.; Acanthus spinulosus Host; Acanthus caroli-alexandri Hausskn.
Tall herbaceous plant differering from A. mollis in deeply pinnatifid  leaves with spinose teeth, bracts and calyx teeth with spinose tips.

Photographed from University of California Botanical Garden in June, 2008
Common name: spiny bear’s-breeches 


A lovely plant, thanks Sir for sharing the pics..



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