Antennaria dimorpha

(Nuttall) Torrey & A. Gray

Fl. N. Amer.2: 431. 1843

Common names: Low or two-form or cushion pussytoes
Synonyms: Antennaria dimorpha var. integra L. F. Henderson Antennaria dimorpha var. macrocephala D. C. Eaton Antennaria dimorpha var. nuttallii D. C. Eaton Antennaria latisquama Antennaria macrocephala
Basionyms: Gnaphalium dimorphum Nuttall Trans. Amer. Philos. Soc., n. s. 7: 405. 1841
Treatment appears in FNA Volume 19. Treatment on page 398. Mentioned on page 389, 393, 399.
Dioecious. Plants 0.5–4 cm. Stolons none. Basal leaves: 1-nerved, linear to narrowly spatulate, 8–11 × 1–1.2 mm, tips acute, faces ± gray-tomentose. Cauline leaves linear or oblanceolate, 7–12 mm, not flagged (apices acute). Heads borne singly. Involucres: staminate 6–8 mm; pistillate 10–11 mm. Phyllaries distally dingy brown (apices acute-acuminate). Corollas: staminate 3–5 mm; pistillate 8–10 mm. Cypselae 2–3.5 mm, pubescent; pappi: staminate 4.5–6 mm; pistillate 10–12 mm. 2n = 28, 56.

Phenology: Flowering early–mid spring.
Habitat: Sagebrush steppe, plains, foothills of mountains
Elevation: 600–3400 m

Distribution

V19-633-distribution-map.gif

Alta., B.C., Sask., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Antennaria dimorpha is characterized by narrowly oblanceolate leaves and relatively large heads (borne singly). It is, perhaps, the most xerophytic of spring-blooming Antennaria species. It belongs to the Dimorphae group.

References

None.

Lower Taxa

No lower taxa listed.

Facts about "Antennaria dimorpha"
AuthorRandall J. Bayer +
Authority(Nuttall) Torrey & A. Gray +
BasionymsGnaphalium dimorphum +
Common nameLow or two-form or cushion pussytoes +
DistributionAlta. +, B.C. +, Sask. +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. + and Wyo. +
Elevation600–3400 m +
HabitatSagebrush steppe, plains, foothills of mountains +
Illustration copyrightFlora of North America Association +
IllustratorYevonn Wilson-Ramsey +
PhenologyFlowering early–mid spring. +
Publication titleFl. N. Amer. +
Publication year1843 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V19-20-21/V19 633.xml +
SynonymsAntennaria dimorpha var. integra +, Antennaria dimorpha var. macrocephala +, Antennaria dimorpha var. nuttallii +, Antennaria latisquama + and Antennaria macrocephala +
Taxon familyAsteraceae +
Taxon nameAntennaria dimorpha +
Taxon parentAntennaria +
Taxon rankspecies +
VolumeVolume 19 +