Belongs within: Astereae.
Erigeron, the fleabane daisies, is a cosmopolitan genus of herbs and subshrubs with generally radiate heads, often borne in loose clusters (Hickman 1993).
Characters (from Hickman 1993): Annual to perennial (subshrub). Stems generally erect. Leaves alternate, generally entire. Inflorescence with heads generally radiate, one to many in loose, panicle-like or flat-topped clusters; involucre hemispheric; phyllaries narrowly lanceolate, in two to several equal to strongly graded series; receptacle flat to steeply conic, naked, smooth to shallowly pitted. Ray florets, if present, generally ten to many; ligules generally white, pink, or blue (rarely yellow). Disk florets many; corollas generally narrow funnel-shaped, yellow; style tips 0.1–0.8 mm, more or less triangular. Fruit 0.5–3 mm, generally more or less oblong, compressed to more or less cylindric, generally two-ribbed, generally sparsely hairy; pappus, if present, generally of 6–50 longer inner bristles and shorter outer bristles, narrow scales, or short crown.
<==Erigeron |--E. aequifoliusH93 |--E. algidus [incl. E. petiolaris]H93 |--E. aliceaeH93 |--E. alpinumC55 |--E. angustatusH93 |--E. annuusMH98 |--E. aphanactisH93 | |--E. a. var. aphanactisH93 | `--E. a. var. congestusH93 |--E. austiniae [=E. chrysopsidis ssp. austiniae]H93 |--E. berbellulatusH93 |--E. bellidioidesO88 |--E. biolettii [=E. inornatus var. biolettii]H93 |--E. blochmaniae [=E. foliosus var. blochmaniae]H93 |--E. bloomeriH93 | |--E. b. var. bloomeri [incl. E. bloomeri var. pubens]H93 | `--E. b. var. nudatusH93 |--E. bonariensis Linnaeus 1753 (see below for synonymy)BR65 |--E. boveiD17 |--E. breweriH93 | |--E. b. var. breweriH93 | |--E. b. var. bisanctusH93 | |--E. b. var. covillei [=E. foliosus var. covillei]H93 | |--E. b. var. jacinteusH93 | |--E. b. var. klamathensisH93 | `--E. b. var. porphyreticusH93 |--E. calvusH93 |--E. canadensisBR65 |--E. cervinus [incl. E. delicatus]H93 |--E. clokeyiH93 |--E. compactusH93 |--E. compositus [incl. E. compositus var. discoideus, E. compositus var. glabratus]H93 |--E. concinnusH93 | |--E. c. var. concinnus [incl. E. pumilus ssp. concinnoides]H93 | `--E. c. var. condensatusH93 |--E. coulteriH93 |--E. decumbensH93 | |--E. d. var. decumbensH93 | `--E. d. var. robustiorH93 |--E. dissectusJ87 |--E. divergensH93 |--E. domingensisJ87 |--E. eatoniiH93 | |--E. e. var. eatoniiH93 | |--E. e. var. nevadincolaH93 | |--E. e. var. plantagineusH93 | `--E. e. var. sonneiH93 |--E. elegantulusH93 |--E. elmeri [=E. breweri var. elmeri]H93 |--E. filifoliusH93 | |--E. f. var. filifoliusH93 | `--E. f. var. robustior non E. decumbens var. robustiorH93 |--E. floribundusBR65 |--E. foliosusH93 | |--E. f. var. foliosus [incl. E. foliosus var. stenophyllus]H93 | |--E. f. var. confinisH93 | |--E. f. var. franciscensisH93 | |--E. f. var. hartwegiiH93 | `--E. f. var. mendocinusH93 |--E. glaucisMM96 |--E. inornatusH93 | |--E. i. var. inornatusH93 | |--E. i. var. calidipetrisH93 | `--E. i. var. keiliiH93 |--E. karvinskianusJ87 |--E. lassenianusH93 | |--E. l. var. lassenianus [incl. E. flexuosus]H93 | `--E. l. var. deficiensH93 |--E. linearisH93 |--E. lobatusH93 |--E. macranthusC00 |--E. mariposanusH93 |--E. miserH93 |--E. morrisonensisCP02 |--E. multicepsH93 |--E. multiradiatusO88 |--E. parishiiH93 |--E. peregrinusH93 | |--E. p. var. peregrinusH93 | |--E. p. var. callianthemus [incl. E. peregrinus var. angustifolius]H93 | `--E. p. var. hirsutusH93 |--E. peruvianus (Lam.) Cuatrecasas 1961 (see below for synonymy)C61 | |--E. p. var. peruvianusC61 | `--E. p. var. lineatus Cuatrecasas 1961C61 |--E. petrophilusH93 | |--E. p. var. petrophilusH93 | |--E. p. var. sierrensisH93 | `--E. p. var. viscidulus [=E. inornatus var. viscidulus]H93 |--E. philadelphicusMH98 |--E. pumilusH93 | |--E. p. var. pumilusH93 | `--E. p. var. intermediusH93 |--E. pusillusMH98 |--E. pygmaeusH93 |--E. reductusH93 | |--E. r. var. reductus [=E. inornatus var. reductus]H93 | `--E. r. var. angustatus non E. angustatus [=E. inornatus var. angustatus]H93 |--E. sanctarumH93 |--E. serpentinusH93 |--E. sessilifoliusBR65 |--E. sordidusD03 |--E. strigosusH93 |--E. sumatrensisMH98 |--E. supplexH93 |--E. tenerH93 |--E. tergoalbus Cuatrecasas 1961C61 |--E. uncialisH93 | |--E. u. var. uncialisH93 | `--E. u. var. conjugansH93 |--E. uniflorusO88 |--E. utahensisH93 `--E. vagusH93
Erigeron bonariensis Linnaeus 1753 [incl. Conyza ambigua Candolle 1815, E. crispus Pourret 1788, E. linifolius Willdenow 1804]BR65
Erigeron peruvianus (Lam.) Cuatrecasas 1961 [=Doronicum peruvianum Lam. 1786, Arnica peruviana (Lam.) Pers. 1807, Aster peruvianus (Lam.) Cabrera 1959; incl. Liabum erigeroides Benth. 1845, Erigeron hybridus Hieron. 1895, E. lehmannii Hieron. 1894, E. loxensis Hieron. 1895, Aster pellitus HBK 1820, Celmisia pellita (HBK) Sch. Bip. 1856, Erigeron pellitum (HBK) Wedd. 1857, E. stuebelii Hieron. 1895]C61
*Type species of generic name indicated
References
[BR65] Black, J. M., & E. L. Robertson. 1965. Flora of South Australia. Part IV. Oleaceae-Compositae. W. L. Hawes, Government Printer: Adelaide.
[C55] Candolle, A. de. 1855. Géographie Botanique Raisonée: Ou exposition des faits principaux et des lois concernant la distribution géographique des plantes de l’époque actuelle vol. 2. Librairie de Victor Masson: Paris.
[CP02] Chung, S.-W., & C.-I. Peng. 2002. Senecio kuanshanensis (Asteraceae), a new species from southern Taiwan. Botanical Bulletin of Academia Sinica 43: 155–159.
[C00] Cockerell, T. D. A. 1900. Observations on bees collected at Las Vegas, New Mexico, and in the adjacent mountains. Annals and Magazine of Natural History, series 7, 5: 401–416.
[C61] Cuatrecasas, J. 1961. Studies on Andean Compositae V. Proceedings of the Biological Society of Washington 74: 7–28.
[D17] Diels, L. 1917. Beiträge zur Flora der Zentral-Sahara und ihrer Pflanzengeographie. Nach der Sammelausbeute des Freiherrn Hans Geyr von Schweppenburg. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 54 (Beiblatt 120): 51–155.
[D03] Dusén, P. 1903. The vegetation of western Patagonia. In: Scott, W. B. (ed.) Reports of the Princeton University Expeditions to Patagonia, 1896–1899 vol. 8. Botany pp. 1–34. The University: Princeton (New Jersey).
[J87] Judd, W. S. 1987. Floristic study of Morne La Visite and Pic Macaya National Parks, Haiti. Bulletin of the Florida State Museum—Biological Sciences 32 (1): 1–136.
[MH98] Morikawa, H., A. Higaki, M. Nohno, M. Takahashi, M. Kamada, M. Nakata, G. Toyohara, Y. Okamura, K. Matsui, S. Kitani, K. Fujita, K. Irifune & N. Goshima. 1998. More than a 600-fold variation in nitrogen dioxide assimilation among 217 plant taxa. Plant, Cell and Environment 21: 180–190.
[MM96] Mound, L. A., & R. Marullo. 1996. The thrips of Central and South America: an introduction (Insecta: Thysanoptera). Memoirs on Entomology, International 6: 1–487.
[O88] Ohba, H. 1988. The alpine flora of the Nepal Himalayas: an introductory note. In: Ohba, H., & S. B. Malla (eds) The Himalayan Plants vol. 1. The University Museum, University of Tokyo, Bulletin 31: 19–46.