- cascade penstemon as a noun:
- 1
cascade penstemon
noun
1 cascade penstemon
Whorls of deep blue to dark purple flowers at tips of erect leafy stems; moist places from British Columbia to Oregon.
synonym: Penstemon serrulatus.
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noun
Whorls of deep blue to dark purple flowers at tips of erect leafy stems; moist places from British Columbia to Oregon.
synonym: Penstemon serrulatus.
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