Plant Index


 
 
 
 

Trichostema dichotomum

Trichostema dichotomum L.

forked bluecurls, common blue curls

Trichostema dichotomum (Forked Bluecurls)
Image ID: 8228
Image by: Parkins, Grant Morrow
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: TRDI2
SCIENTIFIC NAME: Trichostema dichotomum
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2020-01-03

GENUS INDEX

GENUS CODE: TRICH9
GENUS SCIENTIFIC: Trichostema
GENUS AUTHORITY: L.
GENUS COMMON: Bluecurls
GENUS SUMMARY: A genus of about 18 species, shrubs, annual and perennial herbs, of temperate North America (especially diverse in w. North America, with a second center of diversity in se. North America). Morphology, pollen, and phytogeography suggest the plausible recognition of Trichostema section Orthopodium (which includes this species and several from w. North America) as Isanthus, a genus distinct from section Trichostema (which includes all other eastern North American species).
GENUS IDENTIFICATION:
GENUS REFERENCES: Weakley (in prep.)=Z; Lewis (1945)=Y; Harley et al. in Kadereit (2004).

FAMILY INDEX

FAMILY CODE: LAMIAC
FAMILY SCIENTIFIC: Lamiaceae
FAMILY AUTHORITY: Lindley 1836 or LABIATAE A.L. de Jussieu 1789
FAMILY COMMON: Mint Family
FAMILY SUMMARY: A family of about 230-250 genera and 6700-7170 species, herbs, shrubs, vines, and trees, cosmopolitan. The placement in the Lamiaceae of several genera traditionally placed in Verbenaceae (e.g. Clerodendrum) is strongly supported by several lines of evidence.
FAMILY REFERENCE: Harley et al. in Kadereit (2004).

NCBG DESCRIPTIVES

INTRO: Erect annual found in dry woodlands, disturbed areas and thin soils around rock outcrops.
STEMS: Stems 4-angled, branched, hairy and with abundant long-stalked glands.
LEAVES: Leaves opposite, petiolate to sessile, elliptic and bluntly pointed, 1/2-2 1/2 in. long, minutely hairy and glandular.
INFLORESCENCE:
FLOWERS: Flowers in a terminal panicle, with 2 leaf-like bracts at the base of each 1- to 3-flowered stalk; dark blue to purple; about 1/2 in. long; bilaterally symmetric; consisting of 5 spreading lobes, the 4 upward-pointing ones similar in size and shape, and the longer downward-pointing one with a blue-purple-spotted white patch; 4 long stamens curl above.
FRUITS:
COMMENTS:
HEIGHT: 1-2 ft.

DURATION: Annual
HABIT: Herb

LEAF ARRANGEMENT: Opposite
LEAF COMPLEXITY: Simple
LEAF RETENTION:

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

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

FRUITING PERIOD:

DISTRIBUTION
HABITAT TYPE: Dry forests, Outcrops and glades, Woods margins
NATIVE RANGE: eastern North America

HORTICULTURAL
Plant Sale Text: Forked bluecurls is a delicate annual that is covered with small but elaborate blue-purple flowers. Its common name refers to the long stamens that curl over at the top of the flower. Blooming late summer to fall, this species produces many flowers over the course of the season, though each flower lasts less than a day. Trichostema dichotomum is in the mint family and is attractive to pollinators, especially native bees. Forked bluecurls readily self-sows, though does not like competition,so give it a little space and you may be rewarded with a bountiful stand of forked bluecurls. It is typically found in dry woodlands, woodlands margins, prairies and disturbed areas.

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Dry, Average
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE: 5
MAXIMUM HARDINESS ZONE: 11
GERMINATION CODE: 5
WILDLIFE VALUE: Bee Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
2680 1987-0143 View
4163 1992-0319 View
5690 1995-0814 View
6348 1995-1480 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
823 SOS 2016-10-26 Flood View
832 SOS 2016-10-31 Dakar View
1357 HORT 2006-10-11 Bryan View
1689 HORT 2005-01-01 Bryan View
2274 NPMD 2019-10-01 Touloupas View
2279 NPMD 2019-10-01 Touloupas View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
6491 4163 200 NCBG staff 1993-03-01 View
8204 5690 204 NCBG staff 1993-01-01 View
9003 6348 2 NCBG staff 0000-00-00 View
12813 0 15 Liloia 0000-00-00 View
13030 0 21 Liloia 0000-00-00 View

USDA PLANTS DATABASE

USDA Symbol: TRDI2
USDA Common Name: Forked Bluecurls
Native Status: L48 (N), CAN (N)
Distribution: USA (AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KY, LA, MA, MD, ME, MI, MO, MS, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, VT, WV), CAN (ON, QC)
Duration: Annual
Growth Habit: Forb/herb

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: UPL UPL FAC UPL UPL

This information is derived from the U.S. Army Corps of Engineers 2016 National Wetland Plant List, Version 3.3 (Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X). Regions: AGCP-Atlantic and Gulf Coastal Plain, AK-Alaska, AW-Arid West, CB-Caribbean, EMP-Eastern Mountains and Piedmont, GP-Great Plains, HI-Hawaii, MW-Midwest, NCNE-Northcentral and Northeast, WMCV-Western Mountains, Valleys & Coast

WEAKLEY FLORA

SCIENTIFIC NAME: Trichostema dichotomum
COMMON NAME: Common Blue Curls
SYNONYMY: [= C, K, Mo, Pa, RAB, S, Va, W, WV, Z; > T. dichotomum var. dichotomum - F; >< T. dichotomum var. puberulum Fernald & Griscom - F; = T. dichotomum var. dichotomum - G; < T. dichotomum - WH3]
PHENOLOGY: Aug-Nov.
HABITAT: Dry woodlands, disturbed areas, thin soils around rock outcrops.
COMMENTS: ME, ON, QC, MI, and IA, south to FL and TX.
RANGE MAP: Trichostema dichotomum.png

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Lamiaceae Lindley 1836 or LABIATAE A.L. de Jussieu 1789 (Mint Family)
SUMMARY: A family of about 230-250 genera and 6700-7170 species, herbs, shrubs, vines, and trees, cosmopolitan. The placement in the Lamiaceae of several genera traditionally placed in Verbenaceae (e.g. Clerodendrum) is strongly supported by several lines of evidence.
REFERENCE: Harley et al. in Kadereit (2004).
ABOUT GENUS (Weakley Flora)
Trichostema L. (Bluecurls)
SUMMARY: A genus of about 18 species, shrubs, annual and perennial herbs, of temperate North America (especially diverse in w. North America, with a second center of diversity in se. North America). Morphology, pollen, and phytogeography suggest the plausible recognition of Trichostema section Orthopodium (which includes this species and several from w. North America) as Isanthus, a genus distinct from section Trichostema (which includes all other eastern North American species).
REFERENCE: Weakley (in prep.)=Z; Lewis (1945)=Y; Harley et al. in Kadereit (2004).

HERBARIUM RESOURCES

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

WEB RESOURCES

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

IMAGE USE RECORDS

ID IMAGE: 8228 - Primary Image FloraQuest Plant Detail Page (Landscape Preferred)
ID IMAGE1: 19004 - Primary Image WOTAS
ID IMAGE2: 0 - Secondary Image WOTAS
ID IMAGE3: 21315 - Primary Image Plant Sale Sign (Landscape Only)
ID IMAGE4: 0 - Primary Image New Plant Sale Label (Portrait Only)

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31 photo(s) available in the Image Gallery

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