Riggin'S Penstemon

(Penstemon triphyllus)

Description

Penstemon triphyllus is a member of Penstemon subg. Saccanthera sect. Saccanthera subsect. Serrulati (Bennett et al. 1987). It is unusual in having whorls of three leaves at each node.

Taxonomic tree:

Domain:

Kingdom: Plantae

Phylum: Magnoliophyta

Class: Magnoliopsida

Order:Lamiales

Family:Plantaginaceae

Genus:Penstemon

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