Plant Index
Eupatorium compositifolium
Eupatorium compositifolium Walter
coastal dog-fennel
Image ID: 20938
Image by: Cressler, Alan M.
Image Collection: NCBG Digital Library
PLANT INDEX
ID_PLANT: EUCO7SCIENTIFIC NAME: Eupatorium compositifolium
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2018-02-07
GENUS INDEX
GENUS CODE: EUPATGENUS SCIENTIFIC: Eupatorium
GENUS AUTHORITY: L.
GENUS COMMON: Thoroughwort
GENUS SUMMARY: A genus of about 40 species, herbs, of e. North America and Eurasia (after the exclusion of Ageratina, Chromolaena, Conoclinium, Eutrochium, Fleischmannia, and other genera). I have differed considerably from Cronquists treatments, as for instance in SE, regarding the rank at which to recognize taxonomic entities in Eupatorium. In the Southeastern United States, Eupatorium is a reticulately evolved complex, including diploids, triploids, and tetraploids; derivatives of hybridization produce sterile pollen but in some cases reproduce vigorously via agamospermous production of seeds. In some cases, these entities form separate populations from their presumed parental species, with distinctive ranges and habitats and more-or-less distinctive morphology. Cronquist treats morphologically highly distinctive entities, such as E. pinnatifidum, as full species, while stating that they are not long-persistent. He treats morphologically more subtle entities as varieties of one of the two presumed parental species, such as E. album var. vaseyi (very probably derived by hybridization of E. album var. album and E. sessilifolium). Other entities, difficult to distinguish morphologically from another species, he does not recognize, as for instance E. saltuense, included as a synonym under E. altissimum (E. saltuense may reflect hybridization between E. altissimum and some other species such as E. album, or possibly between E. hyssopifolium and E. album].
GENUS IDENTIFICATION:
GENUS REFERENCES: Siripun & Schilling in FNA (2006c); Schilling (2011)=Y; Cronquist (1980)=SE; Godfrey (1949). The key adapted from those references. (also see Ageratina, Chromolaena, Conoclinium, Eutrochium, Fleischmannia)
FAMILY INDEX
FAMILY CODE: ASTERAFAMILY SCIENTIFIC: Asteraceae
FAMILY AUTHORITY: Dumortier 1822 or COMPOSITAE Giseke 1792
FAMILY COMMON: Aster Family
FAMILY SUMMARY: A family of about 1500-1700 genera and 20,000-25,000 species, shrubs, herbs, trees, and vines, cosmopolitan in distribution.
FAMILY REFERENCE: Cronquist (1980)=SE throughout family treatment.
NCBG DESCRIPTIVES
INTRO: Erect perennial of sandy disturbed areas.STEMS: Stems 1-several from a somewhat woody crown, stout, branched above, hairy.
LEAVES: Leaves opposite or alternate, crowded, 1--4 in. long, divided into grayish-green, hairy, narrow segments.
INFLORESCENCE:
FLOWERS: Flowers in many clusters of heads along branches; heads tiny, consisting of white disk florets (rays absent) with protruding styles.
FRUITS:
COMMENTS:
HEIGHT: to 6 1/2 ft.
DURATION: Perennial
HABIT: Herb
LEAF ARRANGEMENT: Alternate
LEAF COMPLEXITY:
LEAF RETENTION:
FLORAL CHARACTERISTICS
SYMMETRY: Mixed
BLOOM TIME: Sep-Dec
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| x | x | x | x |
BLOOM COLOR: White
| White | Red | Pink | Orange | Yellow | Green | Blue | Lavender | Purple | Violet | Brown | Not Applicable |
| x |
FRUITING PERIOD:
DISTRIBUTION
HABITAT TYPE: Disturbed, Sandhills
NATIVE RANGE:
HORTICULTURAL
Plant Sale Text:
Bloom Table Text:
NCBG Location:
Cultural Notes:
SOIL MOISTURE:
LIGHT EXPOSURE:
MINIMUM HARDINESS ZONE:
MAXIMUM HARDINESS ZONE:
GERMINATION CODE:
WILDLIFE VALUE:
DEER RESISTANCE:
USDA PLANTS DATABASE
USDA Symbol: EUCO7USDA Common Name: Yankeeweed
Native Status: L48 (N)
Distribution: USA (AL, AR, FL, GA, KY, LA, MS, NC, OK, SC, TN, TX, VA)
Duration: Perennial
Growth Habit: Forb/herb
NATIONAL WETLAND INDICATOR STATUS
| Region: | AGCP | AK | AW | CB | EMP | GP | HI | MW | NCNE | WMVE |
| Status: | FAC | FAC | FACU | FAC |
WEAKLEY FLORA
SCIENTIFIC NAME: Eupatorium compositifoliumCOMMON NAME: Coastal Dog-fennel, Yankeeweed
SYNONYMY: [= FNA, GW, K, RAB, S, SE, W, WH3]
PHENOLOGY: Sep-Dec.
HABITAT: Sandy disturbed areas; common.
COMMENTS: S. VA, KY, and OK south to s. FL and TX. This species, like E. capillifolium, is an excellent indicator of soil disturbance. At its northern limit, in se. VA, this species occurs on riverbanks, in the seasonally exposed drawdown zone (Fleming & Ludwig 1996).
RANGE MAP: Eupatorium compositifolium.png
Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Asteraceae Dumortier 1822 or COMPOSITAE Giseke 1792 (Aster Family)
SUMMARY: A family of about 1500-1700 genera and 20,000-25,000 species, shrubs, herbs, trees, and vines, cosmopolitan in distribution.
REFERENCE: Cronquist (1980)=SE throughout family treatment.
ABOUT GENUS (Weakley Flora)
Eupatorium L. (Thoroughwort)
SUMMARY: A genus of about 40 species, herbs, of e. North America and Eurasia (after the exclusion of Ageratina, Chromolaena, Conoclinium, Eutrochium, Fleischmannia, and other genera). I have differed considerably from Cronquists treatments, as for instance in SE, regarding the rank at which to recognize taxonomic entities in Eupatorium. In the Southeastern United States, Eupatorium is a reticulately evolved complex, including diploids, triploids, and tetraploids; derivatives of hybridization produce sterile pollen but in some cases reproduce vigorously via agamospermous production of seeds. In some cases, these entities form separate populations from their presumed parental species, with distinctive ranges and habitats and more-or-less distinctive morphology. Cronquist treats morphologically highly distinctive entities, such as E. pinnatifidum, as full species, while stating that they are not long-persistent. He treats morphologically more subtle entities as varieties of one of the two presumed parental species, such as E. album var. vaseyi (very probably derived by hybridization of E. album var. album and E. sessilifolium). Other entities, difficult to distinguish morphologically from another species, he does not recognize, as for instance E. saltuense, included as a synonym under E. altissimum (E. saltuense may reflect hybridization between E. altissimum and some other species such as E. album, or possibly between E. hyssopifolium and E. album].
REFERENCE: Siripun & Schilling in FNA (2006c); Schilling (2011)=Y; Cronquist (1980)=SE; Godfrey (1949). The key adapted from those references. (also see Ageratina, Chromolaena, Conoclinium, Eutrochium, Fleischmannia)
HERBARIUM RESOURCES
SERNEC: Find Eupatorium compositifolium in Southeast Regional Network of Experts and Collections (if available)UNC SERNEC: Find Eupatorium compositifolium in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)
WEB RESOURCES
USDA: Find Eupatorium compositifolium in USDA PlantsNPIN: Find Eupatorium compositifolium in NPIN Database
FNA: Find Eupatorium compositifolium in the Flora of North America (if available)
Google: Search Google for Eupatorium compositifolium
IMAGE USE RECORDS
ID IMAGE: 20938 - Primary Image FloraQuest Plant Detail Page (Landscape Preferred)ID IMAGE1: 20938 - Primary Image WOTAS
ID IMAGE2: 0 - Secondary Image WOTAS
ID IMAGE3: 0 - Primary Image Plant Sale Sign (Landscape Only)
ID IMAGE4: 0 - Primary Image New Plant Sale Label (Portrait Only)
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