Plant Index


 
 
 

Eupatorium hyssopifolium

Eupatorium hyssopifolium L.

hyssopleaf eupatorium, hyssopleaf thoroughwort

Eupatorium hyssopifolium (Hyssopleaf Eupatorium)
Image ID: 14411
Image by: Sorrie, Bruce A.
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: EUHY
SCIENTIFIC NAME: Eupatorium hyssopifolium
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2018-01-24

GENUS INDEX

GENUS CODE: EUPAT
GENUS 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: ASTERA
FAMILY 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 dry woodlands, dune grasslands and scrubs, bogs, damp to dry clearings, roadsides, pastures and other disturbed areas.
STEMS: Stems solitary or in small clumps, branched above, finely rough-hairy.
LEAVES: Leaves in whorls of 3-4, sessile, linear, to 3 1/4 in. long, with clusters of shorter leaves or short side branches in the axils.
INFLORESCENCE:
FLOWERS: Composite flowers (heads) arranged in flattish clusters at branch tips; heads white or pinkish, consisting of 5 tiny, tubular florets with protruding styles that give heads a fuzzy appearance. A series of 8-10 hairy, greenish-white bracts surround the base of each head.
FRUITS:
COMMENTS:
HEIGHT: 1-3 ft.

DURATION: Perennial
HABIT: Herb

LEAF ARRANGEMENT: Whorled
LEAF COMPLEXITY: Simple
LEAF RETENTION:

FLORAL CHARACTERISTICS
SYMMETRY: Mixed
BLOOM TIME: Late Jul-Oct
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x 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: Bogs/pocosins, Dry forests, Sandhills, Woods margins
NATIVE RANGE:

HORTICULTURAL
Plant Sale Text:

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Dry, Average, Moist/Wet
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE:
MAXIMUM HARDINESS ZONE:
GERMINATION CODE:
WILDLIFE VALUE:
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
3981 1992-0137 View
5264 1995-0384 View
5490 1995-0613 View
6093 1995-1224 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
517 SOS 2015-10-26 Driskill View
597 SOS 2015-10-17 Maynard View
620 SOS 2015-11-04 Maynard View
623 SOS 2015-11-12 Heraty View
631 SOS 2015-11-13 Driskill View
843 SOS 2016-11-16 Healy View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
6309 3981 200 NCBG staff 1993-03-01 View
7718 5264 203 NCBG staff 1992-01-01 View
8004 5490 204 NCBG staff 1993-01-01 View
8743 6093 2 NCBG staff 0000-00-00 View

USDA PLANTS DATABASE

USDA Symbol: EUHY
USDA Common Name: Hyssopleaf Thoroughwort
Native Status: L48 (N)
Distribution: USA (AL, AR, CT, DC, DE, FL, GA, IL, IN, KY, LA, MA, MD, MO, MS, NC, NJ, NY, OH, PA, RI, SC, TN, TX, VA, WV)
Duration: Perennial
Growth Habit: Forb/herb

WEAKLEY FLORA

SCIENTIFIC NAME: Eupatorium hyssopifolium
COMMON NAME: Hyssopleaf Eupatorium
SYNONYMY: [= Il, Va; = E. hyssopifolium var. hyssopifolium - C, FNA, G, Pa, SE, W; > E. hyssopifolium var. hyssopifolium - F, K; > E. hyssopifolium var. calcaratum Fernald & Schubert - F, K; > E. sessilifolium - S; < E. hyssopifolium - RAB, WV (rejected) (also see E. torreyanum); > E. lecheifolium Greene - S]
PHENOLOGY: Late Jul-Oct.
HABITAT: Roadbanks, pastures, fields, disturbed areas, dry woodlands.
COMMENTS: MA south to GA and west to TN and LA.
RANGE MAP: Eupatorium hyssopifolium.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 hyssopifolium in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Eupatorium hyssopifolium in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

USDA: Find Eupatorium hyssopifolium in USDA Plants
NPIN: Find Eupatorium hyssopifolium in NPIN Database
FNA: Find Eupatorium hyssopifolium in the Flora of North America (if available)
Google: Search Google for Eupatorium hyssopifolium

NCBG IMAGE RECORDS

ID IMAGE1: 14411
ID IMAGE2: 25589
ID IMAGE3: 25587

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25 photo(s) available in the Image Gallery

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