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foothill daisy, foothill fleabane, long-leaf daisy, long-leaf fleabane

sivinsk's erigeron, Sivinski's fleabane

Habit Perennials, 10–50 cm; taprooted, caudices usually with relatively slender and short, often woody branches. Perennials, 5–8 cm; taprooted, caudex branches relatively short, thick, retaining old leaf bases.
Stems

ascending (often purplish proximally), hirsutulous (hairs spreading-deflexed), eglandular.

erect (greenish), closely strigose (hairs white, equal), eglandular.

Leaves

basal (usually persistent) and cauline;

basal blades linear-oblanceolate, (30–)60–160 × 3–8(–14) mm;

cauline 3-nerved, gradually or little reduced distally (bases attenuate), margins entire (apices acute), faces hirsutulous, eglandular.

basal (persistent, persistent portions relatively short and broad) and cauline (petioles erect, greenish, bases broadened or not, not thickened and whitish-indurate);

blades linear, 12–30 × 0.5–0.8 mm, cauline unreduced for ± 1/2 stems, margins entire, eciliate, faces sparsely strigose, eglandular.

Involucres

5–7 × 7–13 mm.

5–6 × (8–)10–14 mm.

Ray florets

35–65;

corollas blue or less commonly pink, 7–13 mm, laminae coiling at apices.

21–33;

corollas white, with abaxial lilac midstripe, 7–9 mm, laminae coiling.

Disc corollas

4–5.3 mm.

3–3.8 mm.

Phyllaries

in 2–3 series, flat, densely hirsute to hirsuto-villous, sometimes sparsely minutely glandular.

in 2–3 series (greenish, relatively thinly herbaceous), sparsely hirsuto-pilose along midribs, minutely glandular.

Heads

1–10(–16) in loosely corymbiform arrays (on branches from distal 1/2 of stems, often well beyond middle).

1.

Cypselae

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

pappi: outer of setae, inner of 20–30 bristles.

(narrowly oblong) 2.8–3.1 mm, 2(–3)–nerved, margins sparsely ciliate, faces glabrous;

pappi: outer of setae, inner of 21–27 bristles.

2n

= 18.

Erigeron corymbosus

Erigeron sivinskii

Phenology Flowering Jun–Aug. Flowering May–Jun.
Habitat Open slopes, grassland, sagebrush, rabbitbrush, openings in ponderosa pine Red clay slopes of Summerville Formation and eroded, shale slopes of the Chinle Formation, desert scrub and pinyon-juniper woodland
Elevation 400–2200 m (1300–7200 ft) 1700–2300 m (5600–7500 ft)
Distribution
from FNA
ID; MT; OR; UT; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM
[BONAP county map]
Discussion

Of conservation concern.

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

Source FNA vol. 20, p. 278. FNA vol. 20, p. 297.
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. canus, E. cascadensis, E. cavernensis, E. cervinus, E. chrysopsidis, E. clokeyi, E. compactus, E. compositus, E. concinnus, E. consimilis, 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. 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
Name authority Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 308. (1840) G. L. Nesom: Phytologia 71: 416. (1992)
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