Agalinis filicaulis

(Bentham) Pennell

Bull. Torrey Bot. Club 40: 438. 1913

Common names: Wire-stemmed false foxglove
Basionyms: Gerardia aphylla var. filicaulis Bentham Compan. Bot. Mag. 1: 174. 1836
Synonyms: G. filicaulis (Bentham) Chapman
Treatment appears in FNA Volume 17. Treatment on page 543. Mentioned on page 527, 537.
Stems simple or branched, 20–40(–50) cm; branches widely and laxly spreading, nearly terete, papillate proximally to glabrate distally, sometimes glaucous. Leaves appressed to strongly ascending; blade subulate to narrowly triangular, 0.8–2.1 x 0.4–0.7 mm, margins entire, siliceous, abaxial midvein scabrous, adaxial surface glabrate; axillary fascicles absent. Inflorescences paniculate, flowers 1 per node; bracts shorter than pedicels. Pedicels ascending, 3–10(–12) mm, glabrous. Flowers: calyx campanulate, tube 1.5–2.1 mm, glabrous, lobes triangular, siliceous at tips, 0.1–0.3 mm; corolla pink, without 2 yellow lines and red spots in abaxial throat, 8–11 mm, throat glabrous externally and glabrous within across bases and sinus of adaxial lobes, lobes: abaxial spreading, adaxial arching forward and overlapped resembling a keel, 1.6–4.2 mm, unequal, abaxial 2.5–4.2 mm, adaxial 1.6–2.5 mm, glabrous externally; proximal anthers parallel to filaments, distal perpendicular to filaments, pollen sacs 0.9–1.6 mm; style exserted, 6.5–7.2 mm. Capsules globular, 3–4 mm. Seeds tan, 0.5–1 mm. 2n = 28.

Phenology: Flowering mid Sep–early Nov.
Habitat: Mesic to moist longleaf pine forests, moist prairies, shallow bogs, moist roadsides, remnant wiregrass communities, borrow pits.
Elevation: 0–20 m.


Ala., Fla., Ga., La., Miss.


Plants of Agalinis filicaulis are among the more diminutive in the genus. The corolla with short, arching adaxial lobes that appear keeled is unique in Agalinis. This along with the weak, glaucous stems and small, solitary flowers makes it immediately recognizable.

Selected References


Lower Taxa


Facts about "Agalinis filicaulis"
AuthorJudith M. Canne-Hilliker† + and John F. Hays +
Authority(Bentham) Pennell +
BasionymsGerardia aphylla var. filicaulis +
Common nameWire-stemmed false foxglove +
DistributionAla. +, Fla. +, Ga. +, La. + and Miss. +
Elevation0–20 m. +
HabitatMesic to moist longleaf pine forests, moist prairies, shallow bogs, moist roadsides, remnant wiregrass communities, borrow pits. +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorLinny Heagy +
PhenologyFlowering mid Sep–early Nov. +
Publication titleBull. Torrey Bot. Club +
Publication year1913 +
ReferenceNone +
Source xml grained fna xml/V17/V17 961.xml +
Special statusIllustrated + and Endemic +
SynonymsG. filicaulis +
Taxon familyOrobanchaceae +
Taxon nameAgalinis filicaulis +
Taxon parentAgalinis +
Taxon rankspecies +
VolumeVolume 17 +