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Tweedy's fleabane
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abajo fleabane
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| Perennials, 4–20 cm; taprooted, caudices multicipital crowns or branches relatively short and thick. |
Perennials, 5–15(–24) cm; taprooted, caudices branches relatively thick and short, retaining old leaf bases. |
erect to ascending or decumbent-prostrate, densely strigose (hairs relatively thin), eglandular. |
ascending to decumbent (greenish proximally), usually loosely strigose (hairs ascending, attenuate, basal cells erect), uncommonly hirsute or hirtellous (hairs spreading-deflexed), eglandular. |
basal (persistent) and cauline; basal (silvery) blades spatulate, broadly elliptic, 50–250 × 5–13 mm, cauline abruptly reduced distally, margins entire, faces densely strigoso-sericeous (hairs gray-white), eglandular. |
basal (persistent) and cauline; basal blades usually oblanceolate, 15–70 × 2–6(–8) mm (bases attenuate), margins entire (apices rounded to obtuse); cauline blades linear to linear-oblong or narrowly lanceolate-oblong, mostly 10–40 × 1.5–4 mm, gradually reduced distally; faces strigose, eglandular. |
4–6 × 9–14 mm. |
3.7–5.2 × (5–)10–11 mm. |
20–50; corollas blue to purple, sometimes white, 5–9 mm, laminae not coiling or reflexing. |
35–60; corollas blue to pink or white, 5–6 mm, laminae weakly coiling. |
3.1–4.3 mm. |
2.5–4 mm. |
in 3–4 series, finely hirsuto-strigose, sparsely minutely glandular. |
in 2–3(–4) series, strigose to strigulose or finely hirsuto-villous, minutely glandular. |
1–4. |
1–4. |
2–2.5 mm, 2-nerved, faces strigoso-sericeous; pappi: outer of setae, inner of 20–30 bristles. |
1.5–2 mm, 2-nerved, faces strigose; pappi: outer of setae, inner of 12–20 bristles. |
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| Flowering Jun–Aug. |
Flowering Jul–Aug. |
| Clay hills, rocky slopes, limestone taluses, shale outcrops, sagebrush-grasslands |
Rocky or gravelly open slopes, sagebrush, pinyon-juniper, ponderosa pine, spruce-fir |
| (1300–)1600–3000 m ((4300–)5200–9800 ft) |
(2000–)2800–3500 m ((6600–)9200–11500 ft) |
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ID; MT; WY
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AZ; NM; UT |
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Of conservation concern. Erigeron abajoensis is a segregate of E. caespitosus, separated from the latter only by its strigose (versus hirsute) stems and leaves and greater tendency for 1-nerved leaves. Further, some populations of E. abajoensis have plants variable in orientation of stem vestiture [both antrorsely appressed and deflexed; e.g., Cronquist 9430, Garfield Co., Utah (BRIT, NY); Heil and Clifford 17919, Apache Co., Ariz. (BRIT, SJNM)] and similar variation in cauline vestiture also occurs in E. caespitosus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 304. |
FNA vol. 20, p. 283. |
| Asteraceae > tribe Astereae > Erigeron |
Asteraceae > tribe Astereae > Erigeron |
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. tener, E. tenuis, E. tracyi, E. trifidus, 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. 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. 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 |
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E. awapensis |
| Canby: Bot. Gaz. 13: 17. (1888) |
Cronquist: Brittonia 6: 168. (1947) |
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