Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Lamiales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (2/10/25):
Trichostema coeruleum
FAMILY
Lamiaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Glade Blue Curls at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Trichostema brachiatum
FAMILY
Lamiaceae
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Trichostema brachiatum
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Isanthus brachiatus
Basionym
Isanthus coeruleus
COMMON NAME:
Glade Blue Curls, False Pennyroyal, Fluxweed
To see larger pictures, click or hover over the thumbnails.
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_isbr3_001_lvd
)
Richard and Teresa Ware rtw_i_brachiatus_ccc
October Catoosa County GA
Chickamauga Cedar Glades
Leaves lanceolate to elliptic, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
)
Richard and Teresa Ware rtw_isanthus_brachiatus
October Catoosa County GA
Chickamauga Cedar Glades
Calyx and corolla almost radially symmetrical. Stamens straight, per Wildflowers of the Southern Mountains (Smith, 1998).
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (2/10/25):
Trichostema coeruleum
FAMILY
Lamiaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Trichostema brachiatum
FAMILY
Lamiaceae
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Trichostema brachiatum
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Isanthus brachiatus
Basionym
Isanthus coeruleus
3719
Forb
Annual
Habitat: Shale barrens, outcrops of calcareous or mafic rock, diabase barrens, calcareous dry prairies, disturbed rocky areas, per Weakley's Flora
Native to the Carolinas & Georgia
Rare
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Opposite
Leaves have short petioles.
FLOWER:
Summer/Fall
Light blue
Almost radially symmetrical
5-lobed calyx
5-lobed corolla
4 stamens, straight, only slightly exserted
Superior ovary
Bisexual
Flowers in clusters of 1-3, in axils of upper leaves and bracts
FRUIT:
Summer/Fall?
TO LEARN MORE about this plant, look it up in a good book!
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p404
- Wildflowers of Tennessee (Carman, 2005) p233
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p261
- Wildflowers of the Southern Mountains (Smith, 1998) p146
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".