Species Identification

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

AttributeThe current selection is Penstemon_hartwegii
ClassificationPenstemon Penstemon Fasciculus Fasciculi
GeneralHartweg’s Penstemon. This species has one of the largest flowers of any in the genus and is often used for hybridizing, although it is tender except in mild coastal climates. It was often confused in the past with P. gentianoides. Straw (1961) noted that it is suited for both bumblebee and hummingbird pollination. Blooms: July to September.
AntherSmooth, rounded, opening flat.
StaminodeSmooth to moderately bearded.
Leaves10 cm (4”) long & 1/5-1/10 as wide, fascicles to 3 cm (1 ¼”) long and 1/3 as wide, entire, narrowly lanceolate, bright green.
Stems9-15 dm (36-60”) tall, few fascicles, woody, erect, sometimes branching.
InflorescenseCyme 5-10 cm (2-4”) long, 1-4 flowered, with small bracteoles (reduced bracts or fascicles), leafy, fuzzy stems below inflorescence.
CorollaVery large, 4-5 cm (1 ½-2”) long, intensely red-purple, narrowly expanded with white throat and guidelines, nodding.
Flower Color
Calyx7-10 mm (to 1/4”) long, edges toothed.
HabitatPine-oak wooded highlands, 2100-2800 m (6900-9200’).
RangeHidalgo State, Mexico, north of Mexico City.