Agalinis tenuifolia

(Vahl) Rafinesque

New Fl. 2: 64. 1837.

Common names: Slenderleaf false foxglove gérardie à feuilles ténues
Endemic
Basionym: Gerardia tenuifolia Vahl Symb. Bot. 3: 79. 1794
Synonyms: Agalinis besseyana (Britton) Britton A. tenuifolia var. leucanthera (Rafinesque) Pennell A. tenuifolia var. macrophylla (Bentham) S. F. Blake A. tenuifolia var. parviflora (Nuttall) Pennell A. tenuifolia var. polyphylla (Small) Pennell G. besseyana Britton G. tenuifolia subsp. leucanthera (Rafinesque) Pennell G. tenuifolia subsp. macrophylla (Bentham) Pennell G. tenuifolia subsp. parviflora (Nuttall) Pennell G. tenuifolia subsp. polyphylla (Small) Pennell
Treatment appears in FNA Volume 17. Treatment on page 554. Mentioned on page 536, 537, 544, 546, 553, 555.

Stems simple or branched, 10–100 cm; branches ascending to spreading, quadrangular, sharply ridged to winged distally, glabrate, sometimes scabrous. Leaves spreading, sometimes arching, ascending, or reflexed; blade narrowly linear to linear-lanceolate, 10–70 x 0.3–6 mm, not fleshy, margins entire, adaxial surface scabrous; axillary fascicles absent or shorter than subtending leaves. Inflorescences racemes, elongate, flowers 2 per node; bracts shorter than, or longer than, or both shorter and longer than, pedicels. Pedicels ascending-spreading, some upcurved distally, 6–25 mm, glabrous. Flowers: calyx obconic to hemispheric, tube 2.3–5.5 mm, glabrous, lobes subulate to triangular-subulate, 0.3–2 mm; corolla pink to rose-purple, with 2 yellow lines and red spots in abaxial throat, 7–23 mm, throat pilose externally and glabrous within across bases and sinus of adaxial lobes, lobes: abaxial projected or spreading, adaxial projected over distal anthers, 2–8 mm, abaxial pilose externally, adaxial glabrous externally or pilose proximally; proximal anthers perpendicular or oblique to filaments, distal perpendicular and vertical to filaments, pollen-sacs 1–4 mm; style exserted, 6.7–18 mm. Capsules globular, 4–7 mm. Seeds tan to brown, 0.5–1.5 mm. 2n = 28.


Phenology: Flowering (late Jul–)Aug–Nov.
Habitat: Wet to dry roadsides, ditches, margins of streams and ponds, borders of woodlands, dry to moist prairies, fallow fields, railroad embankments, rocky cliff faces and bluffs.
Elevation: 0–1600 m.

Distribution

Man., N.B., N.S., Ont., P.E.I., Que., Ala., Ark., Colo., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., La., Maine, Md., Mass., Mich., Miss., Mo., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Wyo.

Discussion

Populations of Agalinis tenuifolia in New Brunswick, Nova Scotia, and possibly Prince Edward Island in Canada are presumed introduced.

Agalinis tenuifolia is the most widespread and morphologically variable species of the genus in the flora area. Infraspecific taxa have been recognized based on differences in sizes of corollas, calyx lobes, anthers, capsules, and leaves; presence or absence of axillary fascicles; density of indument on stamens; branches ascending versus spreading; and even the stoutness of reticulations on seed coats. These characters intergrade within and among populations and occur in many other combinations in addition to those described, making these infraspecific taxa arbitrary and inconsistent with plants in the field. Pressed specimens of A. tenuifolia are often confused with A. gattingeri from which they differ by lacking a villous band of trichomes within the corolla at the bases of the adaxial corolla lobes present in A. gattingeri; projecting adaxial corolla lobes versus erect to recurved lobes in A. gattingeri; elongate racemes with two flowers per node versus one flower per node, often appearing to terminate branches in A. gattingeri; and low wings of tissue on the branch angles that are absent or less pronounced in A. gattingeri.

Selected References

None.

Lower Taxa

None.
... more about "Agalinis tenuifolia"
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
rounded +  and gibbous +
pilose +  and glabrous +
Judith M. Canne-Hilliker† +  and John F. Hays +
(Vahl) Rafinesque +
Gerardia tenuifolia +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
narrowly linear;linear-lanceolate +
not fleshy +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
ascending +  and spreading +
ridged +  and quadrangular +
obconic +  and hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Slenderleaf false foxglove +  and gérardie à feuilles ténues +
bilabiate +  and symmetric +
red spots +, pink +  and rose-purple +
subrotate +, cylindric +, club--shaped +, salverform +, campanulate +  and tubular +
0.7 cm7 mm <br />0.007 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ark. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +  and Wyo. +
0–1600 m. +
glabrate +  and lanate +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Wet to dry roadsides, ditches, margins of streams and ponds, borders of woodlands, dry to moist prairies, fallow fields, railroad embankments, rocky cliff faces and bluffs. +
axillary +  and terminal +
alternate +, subopposite +  and opposite +
deciduous +
reflexed +, ascending +, arching +  and spreading +
yellow;yellow;yellow +
subulate +  and triangular-subulate +
2-pinnatifid +, pinnatifid +  and cleft +
tenuinucellate +  and unitegmic +
campylotropous-like +
spikelike +
upcurved +  and ascending-spreading +
0.6 cm6 mm <br />0.006 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering (late Jul–)Aug–Nov. +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
vertical +, perpendicular +  and oblique +
spikelike +
60 +  and 600 +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
subequal +
branched +  and simple +
aerial +  and subterranean +
leaning +  and erect +
sericeous +, glabrate +, hispid +  and glabrous +
papillate +  and scabridulous +
10 cm100 mm <br />0.1 m <br /> (100 cm1,000 mm <br />1 m <br />) +
0.67 cm6.7 mm <br />0.0067 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Agalinis besseyana +, A. tenuifolia var. leucanthera +, A. tenuifolia var. macrophylla +, A. tenuifolia var. parviflora +, A. tenuifolia var. polyphylla +, G. besseyana +, G. tenuifolia subsp. leucanthera +, G. tenuifolia subsp. macrophylla +, G. tenuifolia subsp. parviflora +  and G. tenuifolia subsp. polyphylla +
Agalinis tenuifolia +
Agalinis +
species +
glabrous +  and pilose +
campanulate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
perennial +  and annual +