familyAsteraceae
tribeAsteraceae tribe Gnaphalieae
genusAntennaria
speciesAntennaria dimorpha

Antennaria dimorpha

(Nuttall) Torrey & A. Gray

Fl. N. Amer. 2: 431. 1843.

Randall J. Bayer
Common names: Low or two-form or cushion pussytoes
Endemic
Basionym: Gnaphalium dimorphum Nuttall Trans. Amer. Philos. Soc., n. s. 7: 405. 1841
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
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.

Selected References

None.

Lower Taxa

None.
... more about "Antennaria dimorpha"
RDF feed
2n chromosome quantity
56 +  and 28 +
Abaxial face pubescence
tomentose +
Adaxial face pubescence
more or less tomentose +  and sericeous or glabrescent +
Anther base shape
tailed +
Anther dehiscence
introrse +
Anther fusion
connate +
Apex shape
obtuse;more or less truncate +
Apex texture
scarious +
Apical appendage shape
mostly ovate +  and lanceovate or linear +
Appendage pubescence
hirsute +
Appendage quantity
0 +
Appendage relief
papillate +
Array architecture
subcapitate +, racemiform +, paniculiform +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
Randall J. Bayer +
Authority
(Nuttall) Torrey & A. Gray +
Band architecture
continuous +
Band quantity
1 +
Basal leaf architecture
1-nerved +
Basal leaf length
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Basal leaf shape
linear;narrowly spatulate +
Basal leaf width
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Base shape
decurrent +
Basionyms
Gnaphalium dimorphum +
Blade architecture
compound +  and simple +
Blade margin architecture or shape
entire +
Blade margin shape
denticulate +
Blade shape
spatulate;oblanceolate;spatulate;oblanceolate;linear;lanceolate;elliptic;cuneate +
Body architecture or shape
5-ribbed +, 3-ribbed +  and 2-ribbed +
Body relief
muriculate +, papillate +  and smooth +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellulate +
Bristle quantity
12;20 +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Cauline leaf architecture
not flagged +
Cauline leaf shape
oblanceolate +  and linear +
Cauline leaf some measurement
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Common name
Low or two-form or cushion pussytoes +
Corolla architecture
pistillate +  and staminate +
Corolla coloration
red +, yellow +  and white +
Corolla shape
narrowly tubular +  and filiform +
Corolla some measurement
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Cypsela architecture
monomorphic +
Cypsela pubescence
pubescent +
Cypsela shape
mostly ellipsoid +  and ovoid +
Cypsela some measurement
2mm;3.5mm +
Disc-floret architecture
pistillate +  and staminate +
Disc-floret quantity
20 (100) +
Disc floret architecture
staminate +
Disc floret reproduction
bisexual +
Distribution
Alta. +, B.C. +, Sask. +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
Elevation
600–3400 m +
Embryo course
straight +
Face pubescence
gray-tomentose +
Face relief
papillate +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Habitat
Sagebrush steppe, plains, foothills of mountains +
Head architecture or shape
discoid +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Involucre architecture
pistillate +  and staminate +
Involucre diameter
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Involucre position relational
surrounding +
Involucre shape
campanulate;cylindric +
Involucre some measurement
1 cm10 mm <br />0.01 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
alternate +
Leaf position
cauline +  and basal +
Line quantity
2 +
Lobe atypical quantity
4 (5) +
Lobe quantity
5 (?) +
Lobe shape
rarely lanceovate +  and lanceolate +
Margin architecture or shape
entire +
Number of lower taxa
0 +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus architecture
pistillate +  and staminate +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus some measurement
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Petal fusion
connate +
Phenology
Flowering early–mid spring. +
Phyllary atypical quantity
12 (30) +
Phyllary coloration
Dingy brown (?) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary presence
absent +
Phyllary size
unequal +
Phyllary size or width
narrow +
Phyllary texture
Medially herbaceous (Membranous or scarious) +
Phyllary variability
equal +
Publication title
Fl. N. Amer. +
Publication year
1843 +
Ray-floret presence
absent +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
foveolate +
Receptacle shape
flat;convex or ovoid +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
5 (15) +
Series quantity
3;6 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V19 633.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem orientation
erect +
Stolon quantity
0 +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Antennaria dimorpha var. integra +, Antennaria dimorpha var. macrocephala +, Antennaria dimorpha var. nuttallii +, Antennaria latisquama +  and Antennaria macrocephala +
Taxon family
Asteraceae +
Taxon name
Antennaria dimorpha +
Taxon parent
Antennaria +
Taxon rank
species +
Tip shape
acute +
Volume
Volume 19 +
Whole-organism atypical some measurement
25 cm250 mm <br />0.25 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Whole-organism duration
perennial +
Whole-organism reproduction
dioecious +
Whole-organism some measurement
4 cm40 mm <br />0.04 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Whole organism atypical some measurement
25 cm250 mm <br />0.25 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Whole organism growth form
plant +
Whole organism some measurement
0.5cm (4cm) +
X chromosome quantity
14 +