Erigeron

Mexican fleabane Erigeron karvinskianus, copyright Colsu.

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. aequifolius H93
    |--E. algidus [incl. E. petiolaris] H93
    |--E. aliceae H93
    |--E. alpinum C55
    |--E. angustatus H93
    |--E. annuus MH98
    |--E. aphanactis H93
    |    |--E. a. var. aphanactis H93
    |    `--E. a. var. congestus H93
    |--E. austiniae [=E. chrysopsidis ssp. austiniae] H93
    |--E. berbellulatus H93
    |--E. bellidioides O88
    |--E. biolettii [=E. inornatus var. biolettii] H93
    |--E. blochmaniae [=E. foliosus var. blochmaniae] H93
    |--E. bloomeri H93
    |    |--E. b. var. bloomeri [incl. E. bloomeri var. pubens] H93
    |    `--E. b. var. nudatus H93
    |--E. bonariensis Linnaeus 1753 (see below for synonymy) BR65
    |--E. breweri H93
    |    |--E. b. var. breweri H93
    |    |--E. b. var. bisanctus H93
    |    |--E. b. var. covillei [=E. foliosus var. covillei] H93
    |    |--E. b. var. jacinteus H93
    |    |--E. b. var. klamathensis H93
    |    `--E. b. var. porphyreticus H93
    |--E. calvus H93
    |--E. canadensis BR65
    |--E. cervinus [incl. E. delicatus] H93
    |--E. clokeyi H93
    |--E. compactus H93
    |--E. compositus [incl. E. compositus var. discoideus, E. compositus var. glabratus] H93
    |--E. concinnus H93
    |    |--E. c. var. concinnus [incl. E. pumilus ssp. concinnoides] H93
    |    `--E. c. var. condensatus H93
    |--E. coulteri H93
    |--E. decumbens H93
    |    |--E. d. var. decumbens H93
    |    `--E. d. var. robustior H93
    |--E. dissectus J87
    |--E. divergens H93
    |--E. domingensis J87
    |--E. eatonii H93
    |    |--E. e. var. eatonii H93
    |    |--E. e. var. nevadincola H93
    |    |--E. e. var. plantagineus H93
    |    `--E. e. var. sonnei H93
    |--E. elegantulus H93
    |--E. elmeri [=E. breweri var. elmeri] H93
    |--E. filifolius H93
    |    |--E. f. var. filifolius H93
    |    `--E. f. var. robustior non E. decumbens var. robustior H93
    |--E. floribundus BR65
    |--E. foliosus H93
    |    |--E. f. var. foliosus [incl. E. foliosus var. stenophyllus] H93
    |    |--E. f. var. confinis H93
    |    |--E. f. var. franciscensis H93
    |    |--E. f. var. hartwegii H93
    |    `--E. f. var. mendocinus H93
    |--E. glaucis MM96
    |--E. inornatus H93
    |    |--E. i. var. inornatus H93
    |    |--E. i. var. calidipetris H93
    |    `--E. i. var. keilii H93
    |--E. karvinskianus J87
    |--E. lassenianus H93
    |    |--E. l. var. lassenianus [incl. E. flexuosus] H93
    |    `--E. l. var. deficiens H93
    |--E. linearis H93
    |--E. lobatus H93
    |--E. mariposanus H93
    |--E. miser H93
    |--E. morrisonensis CP02
    |--E. multiceps H93
    |--E. multiradiatus O88
    |--E. parishii H93
    |--E. peregrinus H93
    |    |--E. p. var. peregrinus H93
    |    |--E. p. var. callianthemus [incl. E. peregrinus var. angustifolius] H93
    |    `--E. p. var. hirsutus H93
    |--E. peruvianus (Lam.) Cuatrecasas 1961 (see below for synonymy) C61
    |    |--E. p. var. peruvianus C61
    |    `--E. p. var. lineatus Cuatrecasas 1961 C61
    |--E. petrophilus H93
    |    |--E. p. var. petrophilus H93
    |    |--E. p. var. sierrensis H93
    |    `--E. p. var. viscidulus [=E. inornatus var. viscidulus] H93
    |--E. philadelphicus MH98
    |--E. pumilus H93
    |    |--E. p. var. pumilus H93
    |    `--E. p. var. intermedius H93
    |--E. pusillus MH98
    |--E. pygmaeus H93
    |--E. reductus H93
    |    |--E. r. var. reductus [=E. inornatus var. reductus] H93
    |    `--E. r. var. angustatus non E. angustatus [=E. inornatus var. angustatus] H93
    |--E. sanctarum H93
    |--E. serpentinus H93
    |--E. sessilifolius BR65
    |--E. sordidus D03
    |--E. strigosus H93
    |--E. sumatrensis MH98
    |--E. supplex H93
    |--E. tener H93
    |--E. tergoalbus Cuatrecasas 1961 C61
    |--E. uncialis H93
    |    |--E. u. var. uncialis H93
    |    `--E. u. var. conjugans H93
    |--E. uniflorus O88
    |--E. utahensis H93
    `--E. vagus H93

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.

[C61] Cuatrecasas, J. 1961. Studies on Andean Compositae V. Proceedings of the Biological Society of Washington 74: 7–28.

[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.