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basin fleabane, Ojo Alamo fleabane

chaparral fleabane

Habit Perennials, (5–)7–30(–35) cm; taprooted, caudex branches relatively short and thick. Perennials, (8–)25–90 cm; taprooted, caudices woody.
Stems

erect (gray-green), moderately to densely gray-green-strigose (hairs white, stiff), eglandular.

erect, sparsely hirsuto-villous (hairs 0.6–2 mm) or glabrous, densely stipitate-glandular (at least on distal 1/2, glands relatively large, capitate).

Leaves

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

basal blades linear to narrowly oblanceolate, 10–70 × 1–3(–5) mm;

cauline little reduced for about 1/2–3/4 stems, margins entire, faces moderately to densely strigose (hairs white, stiff), eglandular.

basal (sometimes withering by flowering) and cauline;

basal blades 15–60 × 8–37 mm;

cauline gradually reduced distally, margins deeply pinnatifid, lobes 2–4(–5) pairs, faces usually glabrous, stipitate-glandular.

Involucres

5–7(–9) × 10–16(–20) mm.

4.5–5.5 × 8–12 mm.

Ray florets

25–60;

corollas white to pink or bluish, 8–15 mm, laminae coiling.

75–130;

corollas white, 8–14 mm, laminae reflexing.

Disc corollas

3.8–5.7 mm.

2.8–3.5 mm.

Phyllaries

in 2–3(–4) series, hirsute to villoso-hirsute, minutely glandular.

in 3–4 series, glabrous or sparsely hirsute, densely stipitate-glandular.

Heads

1.

(1–)5–25(–50) in loosely corymbiform arrays.

Cypselae

2.5–3 mm, (2–)4(–5)-nerved, faces densely strigoso-sericeous;

pappi: outer sometimes of setae or bristles (to 0.5 lengths of inner), inner of 32–50 bristles.

1–1.2 mm, 2-nerved, faces sparsely strigose;

pappi: outer of setae, inner (readily falling) of (8–)10–12 bristles.

2n

= 18.

Erigeron pulcherrimus

Erigeron oreophilus

Phenology Flowering May–Jun. Flowering Jul–Oct(–Nov).
Habitat Clays, clay-silts, and gravelly soils, saline, gypseous, and seleniferous, commonly in salt desert scrub, pinyon-juniper Open, rocky habitats, cliff ledges or crevices, grassland, chaparral, oak, pine, pine-fir
Elevation 1300–2100 m (4300–6900 ft) 1100–2800(–3100) m (3600–9200(–10200) ft)
Distribution
from FNA
AZ; CO; NM; UT; WY
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; Mexico (Chihuahua, Durango, Sonora)
[WildflowerSearch map]
[BONAP county map]
Discussion

Erigeron oreophilus is similar to E. neomexicanus in its perennial habit, typically pinnatifid leaves, white, reflexing rays, and 10–12 readily falling pappus bristles; it has a vestiture of dense, viscid, stipitate glands and sparse, spreading, nonglandular hairs.

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

Source FNA vol. 20, p. 296. FNA vol. 20, p. 278.
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. 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. 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. bistiensis, E. pulcherrimus var. wyomingia Achaetogeron pringlei, E. delphiniifolius var. oreophilus
Name authority A. Heller: Bull. Torrey Bot. Club 25: 200, plate 340. (1898) Greenman: Proc. Amer. Acad. Arts 41: 257. (1905)
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