CPC Plant Profile: White-margin Beardtongue
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Plant Profile

White-margin Beardtongue (Penstemon albomarginatus)

Penstemon albomarginatus flower Photo Credit: Gina Glenne
Description
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Plantaginaceae
  • State: AZ, CA, NV
  • Nature Serve ID: 127884
  • Date Inducted in National Collection: 09/18/2021

A perennial herb, 1.5-3 dm tall, distinctively pallid in color. The spatula-shaped leaves and the calyx lobes are conspicuously white-margined. Flowers (March-May) are pink-lavender with darker purple accents.

Participating Institutions
Updates
  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 2 accessions of Penstemon albomarginatus in orthodox seed collection. There are as many as 33492 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 2 seed accessions of Penstemon albomarginatus from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants

Nature Serve Biotics
  • 05/02/2017

Penstemon albomarginatus is known from three widely disjunct locations: the Mojave Desert of southern Nevada, the Mojave Desert of southeastern California, and the Sonoran Desert in western Arizona. Rare in California (fewer than five extant occurrences), but occassionally locally abundant elsewhere. The primary threat to this species is habitat degradation due to land-conversion.

Sheila Murray
  • 01/01/2010

Not Available

Sheila Murray
  • 01/01/2010

18 known populations, with individuals numbering in the thousands.

Sheila Murray
  • 01/01/2010

Not Available

Sheila Murray
  • 01/01/2010

BLM, Department of Defense

Sheila Murray
  • 01/01/2010

Not Available

Sheila Murray
  • 01/01/2010

Genetic studies of clusters in the field could determine if each group was clonal. More propagation studies should be carried out to determine if seedlings, cuttings, or transplanted plants could be used for mitigation efforts.

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Photos
Nomenclature
Taxon Penstemon albomarginatus
Authority M.E. Jones
Family Plantaginaceae
CPC Number 7502
ITIS 504203
USDA PEAL3
Common Names white-margin beardtongue | white margin penstemon | whitemargin penstemon | white-margined penstemon
Associated Scientific Names Penstemon albomarginatus
Distribution Sandy dunes and washes in California, Arizona, and Nevada.
State Rank
State State Rank
Arizona S1S2
California S1
Nevada S2
Habitat

In California, this plant occurs in fine alluvial sand in a wide canyon within a creosote bushscrub community. The sand is deep and stabilized, holding the long taproot in place. It is also present in wind-blown sand at the head of the canyon. It occurs at elevations from 2000-3000 ft. (700-1000 m.) in alkaline soil (Scogin, 1989). In Nevada, the plants prefer the base of hills and mountains in wind-blown sand dune-like areas, but are also found in deep loose sand in wash bottoms. In Arizona, it occurs in sandy loam uplands and sandy washes in a broad alluvial plain, but gravelly areas alternating with and interspersed with the sandy places do not support this species.

Ecological Relationships

Not Available

Pollinators
Common Name Name in Text Association Type Source InteractionID
Bees
Leaf-cutting bees Ashmeadiella holtii Floral Visitor Link
Leaf-cutting bees Ashmeadiella xenomastax Floral Visitor Link
Other
Potter wasps Vespid wasps Floral Visitor Link

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