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robust daisy, white cushion fleabane, Willamette fleabane

buff daisy, buff fleabane

Habit Perennials, (15–)25–55 cm (not colonial); taprooted, taproots thin (2–3 mm wide), caudices simple or with relatively slender and short, erect branches. Perennials, (2–)8–18(–20, 30) cm; taprooted, caudices usually simple, rarely branched, relatively thick, woody.
Stems

(often purplish) erect or decumbent, sparsely strigillose (basal cells inclined, hairs even-width), eglandular.

ascending (greenish), loosely strigose to puberulent-strigose, sometimes sparsely minutely glandular.

Leaves

basal (often withering by flowering) and cauline;

basal blades (3-nerved) linear to narrowly oblanceolate, 90–170 × 3–7 mm;

cauline gradually reduced distally, ending proximal to heads, margins entire, faces strigoso-hirsute, eglandular.

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

basal blades linear to linear-oblanceolate, (20–)40–90(–120) × 1–4(–5) mm;

cauline reduced distally or often little reduced on at least proximal 1/2 of stems, (bases gradually tapering) margins entire (apices acute), abaxial faces glabrous at least on distal 1/4–1/2, strigose proximally, adaxial loosely strigose, eglandular.

Involucres

6–8.5 × (12–)14–20 mm.

5.5–7 × 10–15(–18) mm.

Ray florets

21–36;

corollas 7–15(–19) mm, laminae white to pinkish, not coiling or reflexing.

30–62;

corollas white to pinkish, bluish, or lavender, (7–)8–12 mm, laminae coiling.

Disc corollas

3.5–4.5 mm.

2.8–3.6 mm.

Phyllaries

in 2–3(–4) series (narrowly oblanceolate to lanceolate, acute-acuminate), sparsely to moderately hirsute to villous, eglandular.

in 3–4 series, densely and loosely hirsuto-villous (hairs whitish, without colored cross walls), minutely glandular.

Heads

1–3.

1(–3).

Cypselae

(1.8–)2–3.2 mm, 2-nerved, faces sparsely strigose;

pappi: outer of setae, inner of 15–22 bristles.

2–2.6 mm, 2-nerved, faces sparsely villosulous (often hairs spreading);

pappi: outer of setae or scales, inner of 12–15 bristles.

Erigeron robustior

Erigeron ochroleucus

Phenology Flowering Jun–Jul. Flowering Jun–Aug.
Habitat Rocky or gravelly slopes, sometimes over serpentine, glades and meadows, seeps, sagebrush-scrub, proximal montane coniferous forest Rocky or sandy slopes, limestone outcrops, ridges, and talus, meadows, sagebrush-grassland, juniper-mountain mahogany, ponderosa pine, limber pine, limber pine–Douglas fir, alpine tundra
Elevation (200–)700–1500 m ((700–)2300–4900 ft) 1100–3000(–3300) m (3600–9800(–10800) ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; MT; NE; SD; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Plants recognized as var. scribneri are smaller but otherwise essentially similar to typical plants, except for a tendency to produce bluish rays. They occur mostly at higher elevations than more typical plants. P. Lesica (2005) maintained var. scribneri and mapped the two varietites as essentially congruent in geographic range.

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

Source FNA vol. 20, p. 279. FNA vol. 20, p. 294.
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. 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. 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. 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
Synonyms E. decumbens subsp. robustior, E. decumbens var. robustior E. laetevirens, E. montanus, E. ochroleucus var. scribneri, E. scribneri, E. tweedyanus
Name authority (Cronquist) G. L. Nesom: Sida 21: 21. (2004) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 311. (1840)
Web links