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hoary fleabane

slender daisy, slender fleabane, thin daisy

Habit Perennials, 5–35 cm; taprooted, caudex branches relatively thick, usually retaining old leaf bases. Perennials, 2–15(–20) cm; taprooted, caudex branches commonly relatively slender, lignescent.
Stems

erect, densely white strigoso-canescent, eglandular.

erect, sparsely strigillose (hairs white, stiff), sometimes minutely glandular.

Leaves

mostly basal (persistent, ± erect; leaf bases broadened or not, not thickened and whitish-indurate);

blades linear-oblanceolate to oblanceolate, 20–100 × 2–5(–7) mm, cauline sharply reduced or 0 (restricted to proximal 1/4–1/2), margins entire, faces densely white strigoso-canescent, eglandular.

mostly basal (persistent); (gray-green) blades 1-nerved spatulate, rhombic-elliptic to narrowly elliptic-ovate, (10–)15–80 × 2–7 mm, margins entire (apices sharply acute), faces moderately to densely strigillose (hairs white, stiff), eglandular.

Involucres

5–7 × 9–16 mm.

3–5 × 6–12 mm.

Ray florets

20–50(–70);

corollas white to light blue, 7–12 mm, laminae reflexing, sometimes tardily.

(15–)20–40;

corollas blue to purple, 4–8 mm, laminae not coiling or reflexing.

Disc corollas

3.7–5.6 mm.

2.5–4.1 mm.

Phyllaries

in 3–4 series, densely hirsute to strigoso-hirsute, minutely glandular.

in 2–3 series, sparsely to moderately hirsute, densely minutely glandular.

Heads

1(–4).

1(–3).

Cypselae

(nearly terete,) 2.8–3.5 mm, (8–)10–14-nerved, faces glabrous;

pappi: outer of setae or bristles, inner of 24–36 bristles.

1.6–2.5 mm, 2-nerved, faces sparsely strigose;

pappi: outer of setae, inner of 15–25(–30) bristles.

2n

= 18.

= 18.

Erigeron canus

Erigeron tener

Phenology Flowering May–Jul(–Aug). Flowering Jun–Sep.
Habitat Dry hills, grasslands, often in gravelly or shaley soil, sagebrush, pinyon-juniper, pine-oak, oak Rocky or gravelly habitats, often in talus, cliff ledges, crevices, or along ridgetops, in Atriplex, sagebrush, pinyon-juniper, yellow pine, bristlecone pine, limber pine, or spruce
Elevation 1700–2700 m (5600–8900 ft) 1700–3200(–3400) m (5600–10500(–11200) ft)
Distribution
from FNA
AZ; CO; KS; NE; NM; OK; SD; UT; WY; Mexico (Chihuahua)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; ID; MT; NV; OR; UT; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 297. FNA vol. 20, p. 304.
Parent taxa Asteraceae > tribe Astereae > Erigeron Asteraceae > tribe Astereae > Erigeron
Sibling taxa
E. abajoensis, E. acomanus, E. acris, E. aequifolius, E. algidus, E. aliceae, E. allocotus, E. alpiniformis, E. anchana, E. annuus, E. aphanactis, E. arenarioides, E. argentatus, E. arisolius, E. arizonicus, E. asperugineus, E. aureus, E. barbellulatus, E. basalticus, E. bellidiastrum, E. bigelovii, E. biolettii, E. blochmaniae, E. bloomeri, E. breweri, E. caespitosus, E. calvus, E. canaani, E. cascadensis, E. cavernensis, E. cervinus, E. chrysopsidis, E. clokeyi, E. compactus, E. compositus, E. concinnus, E. consimilis, E. corymbosus, E. coulteri, E. cronquistii, E. davisii, E. decumbens, E. denalii, E. disparipilus, E. divergens, E. eatonii, E. elatior, E. elatus, E. elegantulus, E. elmeri, E. engelmannii, E. evermannii, E. eximius, E. filifolius, E. flabellifolius, E. flagellaris, E. flettii, E. foliosus, E. formosissimus, E. garrettii, E. geiseri, E. glabellus, E. glacialis, E. glaucus, E. goodrichii, E. gracilis, E. grandiflorus, E. greenei, E. heliographis, E. hessii, E. howellii, E. humilis, E. hyperboreus, E. hyssopifolius, E. inornatus, E. jonesii, E. kachinensis, E. karvinskianus, E. klamathensis, E. kuschei, E. lackschewitzii, E. lanatus, E. lassenianus, E. latus, E. leibergii, E. leiomerus, E. lemmonii, E. linearis, E. lobatus, E. lonchophyllus, E. maguirei, E. mancus, E. maniopotamicus, E. mariposanus, E. melanocephalus, E. miser, E. modestus, E. muirii, E. multiceps, E. nanus, E. nauseosus, E. nematophyllus, E. neomexicanus, E. nivalis, E. ochroleucus, E. oreganus, E. oreophilus, E. ovinus, E. oxyphyllus, E. pallens, E. parishii, E. parryi, E. peregrinus, E. petrophilus, E. philadelphicus, E. pinnatisectus, E. piperianus, E. piscaticus, E. poliospermus, E. porsildii, E. pringlei, E. procumbens, E. pulchellus, E. pulcherrimus, E. pumilus, E. purpuratus, E. pygmaeus, E. quercifolius, E. radicatus, E. reductus, E. religiosus, E. rhizomatus, E. robustior, E. rybius, E. rydbergii, E. salishii, E. salmonensis, E. sanctarum, E. saxatilis, E. sceptrifer, E. scopulinus, E. serpentinus, E. sionis, E. sivinskii, E. sparsifolius, E. speciosus, E. strigosus, E. subglaber, E. subtrinervis, E. supplex, E. tenellus, E. tener, E. tenuis, E. tracyi, E. trifidus, E. tweedyi, E. uintahensis, E. uncialis, E. uniflorus, E. untermannii, E. ursinus, E. utahensis, E. vagus, E. velutipes, E. vernus, E. versicolor, E. vetensis, E. vicinus, E. vreelandii, E. watsonii, E. wilkenii, E. yukonensis
E. abajoensis, E. acomanus, E. acris, E. aequifolius, E. algidus, E. aliceae, E. allocotus, E. alpiniformis, E. anchana, E. annuus, E. aphanactis, E. arenarioides, E. argentatus, E. arisolius, E. arizonicus, E. asperugineus, E. aureus, E. barbellulatus, E. basalticus, E. bellidiastrum, E. bigelovii, E. biolettii, E. blochmaniae, E. bloomeri, E. breweri, E. caespitosus, E. calvus, E. canaani, E. canus, E. cascadensis, E. cavernensis, E. cervinus, E. chrysopsidis, E. clokeyi, E. compactus, E. compositus, E. concinnus, E. consimilis, E. corymbosus, E. coulteri, E. cronquistii, E. davisii, E. decumbens, E. denalii, E. disparipilus, E. divergens, E. eatonii, E. elatior, E. elatus, E. elegantulus, E. elmeri, E. engelmannii, E. evermannii, E. eximius, E. filifolius, E. flabellifolius, E. flagellaris, E. flettii, E. foliosus, E. formosissimus, E. garrettii, E. geiseri, E. glabellus, E. glacialis, E. glaucus, E. goodrichii, E. gracilis, E. grandiflorus, E. greenei, E. heliographis, E. hessii, E. howellii, E. humilis, E. hyperboreus, E. hyssopifolius, E. inornatus, E. jonesii, E. kachinensis, E. karvinskianus, E. klamathensis, E. kuschei, E. lackschewitzii, E. lanatus, E. lassenianus, E. latus, E. leibergii, E. leiomerus, E. lemmonii, E. linearis, E. lobatus, E. lonchophyllus, E. maguirei, E. mancus, E. maniopotamicus, E. mariposanus, E. melanocephalus, E. miser, E. modestus, E. muirii, E. multiceps, E. nanus, E. nauseosus, E. nematophyllus, E. neomexicanus, E. nivalis, E. ochroleucus, E. oreganus, E. oreophilus, E. ovinus, E. oxyphyllus, E. pallens, E. parishii, E. parryi, E. peregrinus, E. petrophilus, E. philadelphicus, E. pinnatisectus, E. piperianus, E. piscaticus, E. poliospermus, E. porsildii, E. pringlei, E. procumbens, E. pulchellus, E. pulcherrimus, E. pumilus, E. purpuratus, E. pygmaeus, E. quercifolius, E. radicatus, E. reductus, E. religiosus, E. rhizomatus, E. robustior, E. rybius, E. rydbergii, E. salishii, E. salmonensis, E. sanctarum, E. saxatilis, E. sceptrifer, E. scopulinus, E. serpentinus, E. sionis, E. sivinskii, E. sparsifolius, E. speciosus, E. strigosus, E. subglaber, E. subtrinervis, E. supplex, E. tenellus, E. tenuis, E. tracyi, E. trifidus, E. tweedyi, E. uintahensis, E. uncialis, E. uniflorus, E. untermannii, E. ursinus, E. utahensis, E. vagus, E. velutipes, E. vernus, E. versicolor, E. vetensis, E. vicinus, E. vreelandii, E. watsonii, E. wilkenii, E. yukonensis
Synonyms E. phoenicodontus E. caespitosus var. tenerus
Name authority A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 67. (1849) (A. Gray) A. Gray: Notes Compositae, 91. (1880)
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