Erigeron philadelphicus
| Philadelphia fleabane | |
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| Ottawa, Ontario, Canada | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Erigeron |
| Species: | E. philadelphicus
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| Binomial name | |
| Erigeron philadelphicus | |
| Synonyms[1][2] | |
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Erigeron philadelphicus, the Philadelphia fleabane, is a plant in the family Asteraceae. Also known as common fleabane, daisy fleabane, frost-root, marsh fleabane, poor robin's plantain, skervish,[3] and in the British Isles as robin's-plantain.[4] It is native to North America and has been introduced to Eurasia.
Description
E. philadelphicus is a herbaceous plant with alternate, simple leaves, on hairy stems. The flower heads are borne in spring in arrays of as many as 35 heads. Each head may sometimes contain as many as 400 pink or white ray florets surrounding numerous yellow disc florets. The blooms are less than 2.5 centimetres (1 inch) in diameter. The stem is hairy with rough hairs. The middle to lower leaves are heart shaped, and the plant is about 15–76 cm (1⁄2–2+1⁄2 ft) tall. Its active growth period is from spring to summer (April to July).[5][6]
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Flower heads and buds -
Close-up of flower heads & buds -
Flower heads
Varieties
- Erigeron philadelphicus var. glaber J.K.Henry - British Columbia
- Erigeron philadelphicus Linnaeus var. philadelphicus - most of species range
- Erigeron philadelphicus var. provancheri (Victorin & J. Rousseau) B. Boivin - Ontario, Québec; New York, Vermont
Distribution and habitat
The plant is native to North America and found in nearly all of the United States and Canada.[7] It has also been introduced into Europe and Asia, considered an invasive weed in many places.[8] It grows on roadsides, in fields, in thickets, and in open woods.[5][6]
References
- ^ The Plant List, Erigeron philadelphicus L.
- ^ Tropicos, Erigeron philadelphicus L.
- ^ Erigeron philadelphicus. United States Department of Agriculture NRCS Plant Guide.
- ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- ^ a b Flora of North America, Erigeron philadelphicus Linnaeus, 1753. Philadelphia fleabane, vergerette de Philadelphie
- ^ a b Dickinson, T.; Metsger, G.; Hull, J.; and Dickinson, R. (2004) The ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 163.
- ^ Biota of North America Program 2014 state-level distribution map
- ^ Altervista Flora Italiana, Cespica di Philadelfia Erigeron philadelphicus L. includes photos and line drawings
External links
Media related to Erigeron philadelphicus at Wikimedia Commons- "Erigeron philadelphicus". Native Plant Database. Lady Bird Johnson Wildflower Center, University of Texas at Austin.
| Authority control databases: National |
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