Copy permalink to share

Trichostema setaceum Houttuyn. Section: Trichostema. Common name: Narrowleaf Blue Curls. Phenology: Aug-Nov. Habitat: Thin soils around rock outcrops, especially granite flatrocks, dry sandy soils of the Coastal Plain. Distribution: CT west to OH, south to FL and TX, primarily on the Coastal Plain.

Origin/Endemic status: Native

Synonymy ⓘ: = C, F, Fl6, Il, K4, Mo3, NE, NY, Pa, RAB, Tat, Tn, Tx, Va, W, WH3, Lewis (1945), McClelland & Weakley (2019) in Weakley et al (2019a); = Trichostema dichotomum L. var. lineare (Walter) Pursh — G; = Trichostema lineare Walter — S. Basionym: Trichostema setaceum Houtt. 1778

Show in key(s)

Show parent genus | Show parent in key(s)

Heliophily ⓘ: 9

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image of plant© Scott Ward | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Floyd A. Griffith | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Floyd A. Griffith | Original Image ⭷

Feedback

See something missing or incorrect about Trichostema setaceum? Let us know here:

  1. Please include your name and if possible, email in case when need to clarify what you wrote.
  2. If you opt out of including email, please be as specific as possible (e.g., which photo is incorrect?)
  3. Please do not submit questions asking to identify plants or about horticultural topics (e.g., how do I control an invasive plant in my garden?). Instead, those questions can be submitted here for the Carolinas region only.
  4. Please do not send us feedback about unkeyed species as this work is ongoing.
  5. Please allow time for flora edits to show in our next data release. We greatly appreciate your feedback but may require extra time to research complicated taxonomic issues.

Horticultural Information

NCBG trait

Intro: Erect annual of thin soils around rock outcrops, especially granite flatrocks, and dry sandy soils of the Coastal Plain.

Stems: Stems 4-angled, branched, minutely hairy with scattered long hairs, not glandular.

Leaves: Leaves opposite, short-petiolate to sessile, linear and bluntly pointed, to 2 in. long, smooth.

Inforescence:

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 1/3 in. long; consisting of 5 spreading lobes, the 4 upward-pointing ones similar in length to the downward-pointing one, which has a blue-purple-spotted white patch, and 4 long stamens curling above.

Fruits:

Comments:

Height: 4-12 in.

plant sale text:

bloom table text:

description: Erect annual of thin soils around rock outcrops, especially granite flatrocks, and dry sandy soils of the Coastal Plain.

stems: Stems 4-angled, branched, minutely hairy with scattered long hairs, not glandular.

leaves: Leaves opposite, short-petiolate to sessile, linear and bluntly pointed, to 2 in. long, smooth.

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 1/3 in. long; consisting of 5 spreading lobes, the 4 upward-pointing ones similar in length to the downward-pointing one, which has a blue-purple-spotted white patch, and 4 long stamens curling above.

fruits:

comments:

cultural notes:

germination code:

native range:



0 unsaved edits on this page.