Flora of North America species comparison

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Antennaria parvifolia

Antennaria rosulata

little-leaf pussytoes, Nuttall's pussytoes, small-leaf pussytoes

Kaibab pussytoes, woolly pussytoes
Habit Dioecious or gynoecious (staminate plants uncommon or in equal frequency as pistillates, respectively). Dioecious.
Plants

2–8(–15) cm.

0.2–1.5(–2) cm.
Stolons

1–6 cm.

1–2(–3.5) cm.
Basal leaves

1-nerved, narrowly spatulate to spatulate or oblanceolate, 8–35 × 2–15 mm, tips mucronate, faces gray-tomentose.

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 to narrowly oblanceolate, 8–20 mm, not flagged (apices acute).

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

staminate 5.5–7.5 mm;

pistillate 8–10(–15) mm (gynoecious), 7–7.2 mm (dioecious).

staminate 5–7.5 mm;

pistillate 6–10 mm.
Corollas

staminate 3.5–4.5 mm;

pistillate 5–8 mm.

staminate 2.5–4.5 mm;

pistillate 3.5–5.5 mm.
Phyllaries

distally white, pink, green, red, or brown.

distally white.
Heads

2–7 in corymbiform arrays.

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

1–1.8 mm, glabrous or minutely papillate;

pappi: staminate 4–5.5 mm;

pistillate 6.5–9 mm.

0.8–1.5 mm, papillate (bases puberulent);

pappi: staminate 3.5–5 mm;

pistillate 5.5–6.5 mm.
2n

= 56, 84, 112, 140.

= 28.

Antennaria parvifolia

Antennaria rosulata
Phenology Flowering late spring–summer. Flowering summer.
Habitat Prairies, pastures, roadsides, mountain parks, open deciduous woods, and drier coniferous forests, usually ponderosa or lodgepole pine Open slopes and dry meadows, lower montane to montane, or subalpine zone, usually with big sagebrush, Artemisia tridentata
Elevation 100–3400 m (300–11200 ft) 2200–3300 m (7200–10800 ft)
Distribution
from FNA
AZ; CO; IA; ID; MI; MN; MT; ND; NE; NM; NV; OR; SD; TX; UT; WA; WY; AB; BC; MB; ON; SK; Okla (expected in panhandle); Wis (expected); Mexico (Chihuahua, Nuevo León)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NM; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Antennaria parvifolia is a widespread, polyploid complex of sexual (dioecious) and asexual (gynoecious) populations (G. L. Stebbins 1932b; R. J. Bayer and Stebbins 1987). Although variable morphologically, no infraspecific taxa seem warranted at this time. Sexual (dioecious) populations are known primarily from New Mexico and Colorado; apomictic plants occur throughout the range of the species. Probable sexual diploid/tetraploid progenitors of the A. parvifolia complex include A. dioica, A. marginata, A. neglecta, and A. pulchella/A. media. Antennaria parvifolia is characterized by relatively short stature and relatively small numbers of relatively large heads. The epithet parvifolia has been rendered as “parviflora” in floras, e.g., key in Great Plains Flora Association (1986); E. H. Moss (1959); H. J. Scoggan (1978–1979, part 4). In some floras, A. parvifolia has been confused with A. microphylla; the two are probably not closely related.

(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. 406. 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. microphylla, A. monocephala, A. neglecta, A. parlinii, 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. aprica, A. aprica var. aureola, A. aprica var. minuscula, A. aureola, A. dioica var. parvifolia, A. holmii, A. latisquamea, A. minuscula, A. recurva, A. rhodantha A. sierrae-blancae
Name authority Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 406. (1841) 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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