Plant Index


 
 
 

Vernonia acaulis

Vernonia acaulis (Walter) Gleason

stemless ironweed, flatwoods ironweed

Vernonia acaulis (Stemless Ironweed)
Image ID: 30858
Image by: Oglesby, Emily
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: VEAC
SCIENTIFIC NAME: Vernonia acaulis
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2018-02-13

GENUS INDEX

GENUS CODE: VERNO
GENUS SCIENTIFIC: Vernonia
GENUS AUTHORITY: Schreb.
GENUS COMMON: Ironweed
GENUS SUMMARY: A genus of about 20 species, perennial herbs, of e. and c. North America and n. Mexico; a few species in South America. Tradititionally very broadly circumscribed to include about 500 species, trees, shrubs, and herbs, of tropical, subtropical, and warm temperate regions, especially America and Africa; this broader circumscription appears increasingly indefensible.
GENUS IDENTIFICATION: Identification notes: Hybrids are frequent between co-occurring species. Only V. georgiana is keyed separately below (because of its distinctive appearance). Others may be recognized by intermediate morphology and ecological / geographic context.
GENUS REFERENCES: Strother in FNA (2006a); Jones (1982)=Z; Urbatsch (1972)=Y; Jones in Cronquist (1980)=SE. Key based on FNA and SE.

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 from a basal rosette, found in longleaf pine flatwoods, moist ecotones, and moister sandhill situations in the Coastal Plain; in the Piedmont, in dry rocky woodlands, bluffs and barrens.
STEMS: Stems usually 1 per plant, branched above and mostly leafless.
LEAVES: Leaves basal, elliptic to oblong-lance-shaped, 4-8 in. long, irregularly toothed and hairy to rough-hairy; a few alternate stem leaves are linear to elliptic and much smaller.
INFLORESCENCE:
FLOWERS: Composite flowers (heads) arranged at tips of spreading-ascending branches; heads about 1/2 in. wide, consisting of 30-40 spreading purple-magenta, tubular florets with 5 spreading, narrow lobes. Several series of lance-shaped bracts surround the bell-shaped base of each head.
FRUITS: Fruit a cluster of rusty-tufted achenes.
COMMENTS:
HEIGHT: 2-3 ft.

DURATION: Perennial
HABIT: Herb

LEAF ARRANGEMENT: Basal
LEAF COMPLEXITY: Simple
LEAF RETENTION:

FLORAL CHARACTERISTICS
SYMMETRY: Mixed
BLOOM TIME: Jun-Aug
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x

BLOOM COLOR: Purple
White Red Pink Orange Yellow Green Blue Lavender Purple Violet Brown Not Applicable
x x

FRUITING PERIOD: Aug-Oct.

DISTRIBUTION
HABITAT TYPE: Dry forests, Pine savannas, Sandhills
NATIVE RANGE: NC, SC & GA

HORTICULTURAL
Plant Sale Text: Like other vernonias, stemless ironweed produces vivid purple flowers borne in an upright cyme. These flowers are long lasting and attract many late-summer butterflies. The shorter stature of this species makes it an excellent choice for the middle or front of the perennial border. When not in bloom, the distinctive basal rosettes of this species provide an attractive ground cover as the plant seeds into the garden. This Southeastern native perennial is most often found growing wild in the coastal plain region on well-drained soils.

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Dry, Average
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE: 6
MAXIMUM HARDINESS ZONE: 9
GERMINATION CODE: 2
WILDLIFE VALUE: Bee Friendly, Butterfly Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
269 2011-0125 2011-06-16 274 View
4321 1992-0477 View
8440 2005-0514 2005-12-20 View
9107 2005-0547 2006-05-30 1092 View
9387 2021-0050 2021-04-05 0 View
9455 2021-0114 2021-07-14 0 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
274 HORT 2006-10-03 Liloia View
1092 HORT 2003-11-06 Bryan View
1124 HORT 2005-11-01 Bryan View
1262 HORT 2005-11-15 Bryan View
1314 HORT 2006-10-27 Bryan View
1407 HORT 2006-10-06 Bryan View
1818 HORT 2006-10-01 Bryan View
1831 HORT 2006-10-01 Bryan View
2107 NPMD 2020-08-17 Summer View
2115 NPMD 2020-11-02 Marzolf View
2390 NPMD 2019-08-21 Touloupas View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
653 269 15 NCBG staff 2011-05-17 View
654 269 19 NCBG staff 2011-05-13 View
6649 4321 200 NCBG staff 1993-03-01 View
11681 9107 51 Liloia 1967-12-31 View
12636 9387 234 Wait 2020-06-26 View
12637 9387 235 Wait 2020-06-26 View
12850 9455 15 NCBG staff 0000-00-00 View

USDA PLANTS DATABASE

USDA Symbol: VEAC
USDA Common Name: Stemless Ironweed
Native Status: L48 (N)
Distribution: USA (GA, NC, SC)
Duration: Perennial
Growth Habit: Forb/herb

WEAKLEY FLORA

SCIENTIFIC NAME: Vernonia acaulis
COMMON NAME: Flatwoods Ironweed
SYNONYMY: [= FNA, K, RAB, S, SE, WH3]
PHENOLOGY: Late Jun-Aug; Aug-Oct.
HABITAT: Longleaf pine flatwoods, moist ecotones, and moister sandhill situations, in the Piedmont in dry rocky woodlands, bluffs, and barrens.
COMMENTS: Coastal Plain and lower Piedmont of ne. and nc. NC south to sc. GA; allegedly disjunct in Polk County, FL.
RANGE MAP: Vernonia acaulis.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)
Vernonia Schreb. (Ironweed)
SUMMARY: A genus of about 20 species, perennial herbs, of e. and c. North America and n. Mexico; a few species in South America. Tradititionally very broadly circumscribed to include about 500 species, trees, shrubs, and herbs, of tropical, subtropical, and warm temperate regions, especially America and Africa; this broader circumscription appears increasingly indefensible.
REFERENCE: Strother in FNA (2006a); Jones (1982)=Z; Urbatsch (1972)=Y; Jones in Cronquist (1980)=SE. Key based on FNA and SE.

HERBARIUM RESOURCES

SERNEC: Find Vernonia acaulis in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Vernonia acaulis in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

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

NCBG IMAGE RECORDS

ID IMAGE1: 30858
ID IMAGE2: 0
ID IMAGE3: 7920

From the Image Gallery


Image ID: 18090

Image ID: 30855

Image ID: 30854

Image ID: 7919

Image ID: 30856

Image ID: 30857

Image ID: 30866

Image ID: 18092

Image ID: 18091

Image ID: 18089

Image ID: 7965

Image ID: 7964

Image ID: 7963

Image ID: 7921

Image ID: 30862

Image ID: 30863

Image ID: 30853

Image ID: 30864

Image ID: 30865

Image ID: 30867

Image ID: 30868

Image ID: 30861

Image ID: 30860

Image ID: 30859

Image ID: 30852

Image ID: 30851

Image ID: 18093

Image ID: 18088

Image ID: 7920
30 photo(s) available in the Image Gallery

Go back