Species Identification

Interested in the identification of penstemons? Please select a species then click on submit:

AttributeThe current selection is Penstemon_gentianoides
ClassificationPenstemon Penstemon Fasciculus Fasciculi
GeneralGentian Penstemon. Blooms: July to October.
AntherSometimes opening flat, smooth and black.
StaminodeSometimes not bearded or few short hairs, tip slightly dilated and not projecting beyond orifice.
LeavesLarge, 10-15 cm (4-6) long & 1/5-1/0 as wide, lanceolate, fascicle leaves linear, entire, taper to long tip, occur in axils.
Stems5-18 cm (2-7) tall and shorter at high altitudes, very leafy, herbage smooth or fuzzy.
InflorescenseCyme 1-4 cm (1/4-1 ) long, 3-6 flowered, leafy.
CorollaLarge, 30-35 mm ((1 +) long, expanded abruptly widely (bell-like), 2-lipped, bright purple or pink, white inside with darker guidelines.
Flower Color
CalyxLong, 9-11 mm (5/8) long, sepals ovate, thinning at edges with sharp tip.
HabitatHigh elevations, even above timberline or slopes of volcanoes (volcanic soil) to 3380 m (11,000)
RangeCentral MX, s & w of Mexico City, s to n Guatemala.