Penstemon ambiguus
species of plant
Penstemon ambiguus, commonly known as the sand penstemon, pink plains penstemon, or gilia penstemon is a species of Penstemon that grows in the shortgrass prairies and deserts of the western United States and northern Mexico. This bush-like penstemon grows in sandy, loose, and creosote soils and is particularly known for the spectacular flowering show it produces, sometime seasons turning whole hillsides bright pink–white.
Description
Penstemon ambiguus is a perennial, somewhat bushy species with stems that are woody at their base (suffrutescent). The stems are generally 30–40 cm tall, but will sometimes be as short as 20 cm or as tall as 60 cm, and are either smooth or somewhat rough near the base. They have paired leaves that taper from base to the tip, most often 5–30 mm long and only 0.5–1 mm wide, but occasionally as wide as 2.5 mm and as short as 3 mm or as long as 40 mm. The edges of the leaves are either smooth or somewhat rough. The tips of the leaves taper to the point or have an extended leaf rib at the end (acuminate or mucronate).
The plants are relatively shallowly rooted with the majority of their roots within three centimeters of the soil surface. Though a few roots may reach depths of three meters into the soil.
Flowers
Penstemon ambiguus most often blooms from late May to late August, with occasional blooms as late as September.
The public source identifies “Penstemon ambiguus” as species of plant. This brief keeps that definition visible, then builds a research path around Penstemon, ambiguus and species.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jun 9, 2026. The linked authority identifier is Q5600942. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Penstemon ambiguus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.