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The arrow points to the hairy staminode of a Grinnell's penstemon (Penstemon grinnellii) flower. Sometimes, the staminodes are modified to produce nectar, as in the witch hazel . [2] Staminodes can be a critical characteristic for differentiating between species, for instance in the orchid genus Paphiopedilum, and among the penstemons.
Penstemon / ˈ p ɛ n s t ɪ m ən /, [2] ... A prominent, often hairy, staminode is the most distinctive feature of this genus, as in these Penstemon eriantherus var ...
Penstemon virens, commonly known as blue mist penstemon, Front Range penstemon, ... The infertile fifth stamen, the staminode for which the genus is named, is a hairy ...
Penstemon breviculus is a perennial plant that grows flowering stems that usually are between 8 and 20 centimeters (3 and 8 in) tall, but infrequently may grow to 35 cm (14 in). The stems are retrorsely hairy, covered in stiff backwards facing hairs. [2] It is relatively long lived for a Penstemon. [3]
Penstemon grandiflorus, ... The fuzzy staminode or beardtounge is 16–21 millimeters long and may either reach beyond the opening of the flower or be contained ...
Penstemon clevelandii is a species of penstemon known by the common name Cleveland penstemon. ... The staminode is 6 to 11 mm long and does not reach the flower's ...
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