Penstemon rhizomatosus

Penstemon rhizomatosus is a rare species of flowering plant in the plantain family known by the common names Scheel Creek beardtongue[2] and rhizome beardtongue. It is endemic to Nevada in the United States, where it occurs only in the Schell Creek Range of White Pine County.[3]

Penstemon rhizomatosus
Penstemon rhizomatosus.jpg

Critically Imperiled (NatureServe)[1]
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Plantaginaceae
Genus: Penstemon
Species:
P. rhizomatosus
Binomial name
Penstemon rhizomatosus
N.Holmgren

This plant was first described in 1998.[4] It is a perennial herb growing up to about 28 centimeters in maximum height. The clusters of stems arise from a woody caudex and thick taproot. The leaves are lance-shaped and borne on winged petioles. They are up to 3.5 centimeters long including the petioles and are coated in short white hairs. The inflorescence is a thyrse of flowers. The flower has a hairy, glandular calyx of sepals and a purple or reddish corolla between 1 and 2 centimeters long. The staminode is hairless. Blooming occurs in June through August.[3]

This plant grows in a subalpine, or sometimes an alpine climate. It grows on rocky terrain, such as outcrops, scree slopes, and crevices in cliffs. The rock is usually limestone, or sometimes quartzite.[3]

There are six known occurrences of this plant, all located on four peaks in the central Schell Creek Range. They occur within the Humboldt-Toiyabe National Forest.[3]

ReferencesEdit

  1. ^ "NatureServe Explorer". NatureServe Explorer Penstemon rhizomatosus. NatureServe. 2022. Retrieved 22 May 2022.
  2. ^ USDA, NRCS (n.d.). "Penstemon rhizomatosus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 22 September 2015.
  3. ^ a b c d Penstemon rhizomatosus. The Nature Conservancy.
  4. ^ Holmgren, N. H. (1998). Two new species of Penstemon (Scrophulariaceae: sect. Saccanthera) from Nevada, U.S.A. Brittonia 50(2) 159-64.