
1) Asterid dicot genus 2) Genus penstemon 3) Medicinal plant
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https://www.crosswordclues.com/clue/penstemon

Penstemon ən, the beardtongues, is a large genus of North American and East Asian flowering plants formerly placed in the Scrophulariaceae family (Cronquist system). Due to new genetic research, it has now been placed in the vastly expanded family Plantaginaceae. They have opposite leaves, partly tube-shaped, and two-lipped flowers and seed capsu...
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http://en.wikipedia.org/wiki/Penstemon

the beard-tongue genus of the mint order (Lamiales), containing about 250 species of plants native to North America, particularly the western United ...
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http://www.britannica.com/eb/a-z/p/40

(Beardtongue) These are hardy and tender perennials from North America. They form clumps, 2 to 3 feet tall and produce mostly basal leaves, 2 to 3 inches long. Their flowers grow in loose spikes resembling a snapdragon. They are pouched and up to 2 inches across. They come in most colors and often have a contrasting throat and veins. Picking off th...
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http://www.encyclo.co.uk/local/10004

[
n] - large genus of subshrubs or herbs having showy blue or purple or red or yellow or white flowers
Found on
http://www.webdictionary.co.uk/definition.php?query=Penstemon
genus Penstemon noun large genus of subshrubs or herbs having showy blue or purple or red or yellow or white flowers; mostly western North America
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.