Flora of North America species comparison

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Antennaria microphylla

Antennaria rosulata

little-leaf pussytoes, pink pussytoes, rosy pussytoes, small pussytoes, white pussytoes

Kaibab pussytoes, woolly pussytoes
Habit Dioecious. Dioecious.
Plants

9–30 cm (stems stipitate-glandular distally).

0.2–1.5(–2) cm.
Stolons

1–5 cm.

1–2(–3.5) cm.
Basal leaves

1-nerved, spatulate, 6–16 × 2–6 mm, tips mucronate, faces silvery gray-pubescent.

1-nerved, spatulate, spatulate-obovate, or oblanceolate, 6.5–13 × 2–5 mm, tips mucronate, faces silvery gray-pubescent (often obscurely stipitate-glandular).
Cauline leaves

linear, 5–25 mm, not flagged (apices acute).

linear, 2–9 mm, not flagged (apices acute).
Involucres

staminate 5–6.5 mm; pistillate 5.5–7 mm.

staminate 5–7.5 mm; pistillate 6–10 mm.
Corollas

staminate 2.5–3 mm; pistillate 3–4.3 mm.

staminate 2.5–4.5 mm; pistillate 3.5–5.5 mm.
Phyllaries

distally bright white to light yellow.

distally white.
Heads

6–13 in corymbiform arrays.

usually borne singly (rarely 2–3; subsessile among basal leaves).
Cypselae

0.7–1.2 mm, glabrous or sparingly papillate;

pappi: staminate 3–4 mm; pistillate 3–5 mm.

0.8–1.5 mm, papillate (bases puberulent);

pappi: staminate 3.5–5 mm; pistillate 5.5–6.5 mm.
2n

= 28.

= 28.

Antennaria microphylla

Antennaria rosulata
Phenology Flowering early–mid summer. Flowering summer.
Habitat Moist open areas, flood plains of streams, margins of alkaline depressions, lower montane to subalpine (subarctic) Open slopes and dry meadows, lower montane to montane, or subalpine zone, usually with big sagebrush, Artemisia tridentata
Elevation 0–3200 m (0–10500 ft) 2200–3300 m (7200–10800 ft)
Distribution
from FNA
AK; AZ; CA; CO; ID; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NM; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Antennaria microphylla is a primary sexual progenitor of the A. rosea polyploid agamic complex (R. J. Bayer 1990b). A. Cronquist (1955) included A. rosea within his circumscription of A. microphylla. It is preferable to recognize sexual diploids as distinct from their morphologically discrete hybrid apomictic derivatives. Antennaria microphylla is always dioecious and has stems distally stipitate-glandular and white phyllaries; A. rosea is always gynoecious and has stems without glandular hairs and phyllaries only occasionally white.

Some authors (A. E. Porsild 1950; E. H. Moss 1959; Porsild and W. J. Cody 1980) have recognized A. nitida as distinct; comparisons of the nomenclatural types of the two show that they are conspecific. Antennaria microphylla has allelopathic properties (G. D. Manners and D. S. Galitz 1985).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Antennaria rosulata is easily recognizable by its silvery gray leaves, dense, humifuse growth form, and heads borne singly (R. J. Bayer 1987b). Its distribution is centered on the four corners area (Bayer and G. L. Stebbins 1987). It has probably contributed to the origins of some of the clones of A. rosea with low stature and low numbers of flowering heads that are found in Arizona, Colorado, New Mexico, and Utah.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 407. FNA vol. 19, p. 407.
Parent taxa Asteraceae > tribe Gnaphalieae > Antennaria Asteraceae > tribe Gnaphalieae > Antennaria
Sibling taxa
A. alpina, A. anaphaloides, A. arcuata, A. argentea, A. aromatica, A. corymbosa, A. densifolia, A. dimorpha, A. dioica, A. flagellaris, A. friesiana, A. geyeri, A. howellii, A. lanata, A. luzuloides, A. marginata, A. media, A. monocephala, A. neglecta, A. parlinii, A. parvifolia, A. plantaginifolia, A. pulchella, A. pulcherrima, A. racemosa, A. rosea, A. rosulata, A. soliceps, A. solitaria, A. stenophylla, A. suffrutescens, A. umbrinella, A. virginica
A. alpina, A. anaphaloides, A. arcuata, A. argentea, A. aromatica, A. corymbosa, A. densifolia, A. dimorpha, A. dioica, A. flagellaris, A. friesiana, A. geyeri, A. howellii, A. lanata, A. luzuloides, A. marginata, A. media, A. microphylla, A. monocephala, A. neglecta, A. parlinii, A. parvifolia, A. plantaginifolia, A. pulchella, A. pulcherrima, A. racemosa, A. rosea, A. soliceps, A. solitaria, A. stenophylla, A. suffrutescens, A. umbrinella, A. virginica
Synonyms A. bracteosa, A. microphylla var. solstitialis, A. nitida, A. rosea var. nitida, A. solstitialis A. sierrae-blancae
Name authority Rydberg: Bull. Torrey Bot. Club 24: 303. (1897) Rydberg: Bull. Torrey Bot. Club 24: 300. (1897)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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