Kingdom:
Phylum:
Angiosperms
Order:
Lamiales
Genus:
Species:
acaulis
ID:
1137605

Status:
valid

Authors:
L.O.Williams

Source:
tro

Year:
1934

Citation Micro:
Ann. Missouri Bot. Gard. 21: 345 (1934)

WFO Identifier:
wfo-0001136943

Common Names

  • Acaulis Penstemon
  • Stemless Penstemon
  • Stemless Beardtongue

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Description

Penstemon acaulis (also called Stemless Penstemon, among many other common names) is a perennial herb that grows to a height of about 0.5 m. It has a single stem and a basal rosette of leaves. The flowers are white or pinkish in color and are borne in a dense spike. It is native to western North America, from British Columbia to California, and grows in moist meadows and open woods.

Uses & Benefits

Penstemon acaulis is used as an ornamental plant in gardens and is also used in dryland restoration projects. It is drought tolerant and can be used as a ground cover.

Flower, Seeds and Seedlings

The flower of Penstemon acaulis is a pinkish-purple, tubular flower with a hairy calyx. The seed is a small, brown, oval-shaped seed. The seedlings are small, with a single pair of leaves.

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Cultivation and Propagation

Penstemon acaulis can be propagated by seed or division. It prefers moist, well-drained soils in full sun to partial shade. It is drought tolerant once established. Deadhead spent flowers to encourage reblooming.

Where to Find Penstemon acaulis

Penstemon acaulis can be found in the western United States, from California to Montana.

Species in the Penstemon genus

Penstemon brevisepalus, Penstemon franklinii, Penstemon schaffneri, Penstemon saltarius, Penstemon moronensis, Penstemon inflatus, Penstemon pseudoparvus, Penstemon oklahomensis, Penstemon nitidus, Penstemon campanulatus, Penstemon tubiflorus, Penstemon vizcainensis, Penstemon vulcanellus, Penstemon gormanii, Penstemon gracilis, Penstemon gentianoides, Penstemon xylus, Penstemon superbus, Penstemon griffinii, Penstemon metcalfei, Penstemon wendtiorum, Penstemon dubius, Penstemon albidus, Penstemon ambiguus, Penstemon angustifolius, Penstemon auriberbis, Penstemon buckleyi, Penstemon clutei, Penstemon cobaea, Penstemon digitalis, Penstemon fendleri, Penstemon glaber, Penstemon haydenii, Penstemon jamesii, Penstemon laxiflorus, Penstemon pallidus, Penstemon procerus, Penstemon serrulatus, Penstemon tubaeflorus, Penstemon virens, Penstemon imberbis, Penstemon abietinus, Penstemon acaulis, Penstemon acuminatus, Penstemon alamosensis, Penstemon albertinus, Penstemon albomarginatus, Penstemon anguineus, Penstemon arenarius, Penstemon arenicola,

Species in the Plantaginaceae family

Acanthorrhinum ramosissimum, Adenosma annamense, Adenosma bracteosum, Adenosma camphoratum, Adenosma cordifolium, Adenosma debilis, Adenosma elsholtzioides, Adenosma glutinosum, Adenosma hirsutum, Adenosma indianum, Adenosma inopinatum, Adenosma javanicum, Adenosma macrophyllum, Adenosma malabaricum, Adenosma microcephalum, Adenosma muelleri, Adenosma nelsonioides, Adenosma papuana, Adenosma punctata, Adenosma retusilobum, Adenosma subrepens, Adenosma ternata, Adenosma thorelii, Agathelpis adunca, Agathelpis brevifolia, Agathelpis mucronata, Albraunia foveopilosa, Albraunia fugax, Albraunia psilosperma, Anamaria heterophylla, Anarrhinum bellidifolium, Anarrhinum corsicum, Anarrhinum duriminium, Anarrhinum forsskaolii, Anarrhinum fruticosum, Anarrhinum intermedium, Anarrhinum laxiflorum, Anarrhinum longipedicellatum, Anarrhinum orientale, Anarrhinum pedatum, Anarrhinum forskaohlii, Ancistrostylis harmandii, Angelonia acuminatissima, Angelonia alternifolia, Angelonia angustifolia, Angelonia arguta, Angelonia biflora, Angelonia bisaccata, Angelonia blanchetii, Angelonia campestris,

References

Louis Otho Williams (1908-1991): Based on occurrence of standard abbreviation 'L.O.Williams' in the authors string.
POWO record for urn:lsid:ipni.org:names:187118-2: Govaerts R (ed.). 2023. WCVP: World Checklist of Vascular Plants [Version 11]. Facilitated by the Royal Botanic Gardens, Kew. [WWW document] URL http://sftp.kew.org/pub/data-repositories/WCVP/ [accessed 20 April 2023].