Agalinis tenuifolia
Agalinis plukenetii
gérardie à feuilles ténues, slender-leaf agalinis, slender-leaf false foxglove
Chattahoochee false foxglove, Plukenet's false foxglove
simple or branched, 10–100 cm;
branches ascending to spreading, quadrangular, sharply ridged to winged distally, glabrate, sometimes scabrous.
often leaning, simple or branched, 30–100 cm, bushy;
branches spreading-ascending, subterete proximally to quadrangular-ridged distally, glabrous or sparsely scabridulous distally.
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.
widely spreading to slightly ascending;
blade filiform, 18–45 x 0.2–0.8 mm, not fleshy, margins entire, adaxial surface scabridulous;
axillary fascicles absent.
racemes, elongate, flowers 2 per node;
bracts shorter than, or longer than, or both shorter and longer than, pedicels.
racemiform, flowers 1 per node, some flowers pseudoterminal;
bracts longer than pedicels.
ascending-spreading, some upcurved distally, 6–25 mm, glabrous.
spreading-ascending, 3–8 mm, glabrous.
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.
calyx hemispheric, tube 3–5 mm, glabrous, lobes deltate-subulate, 0.2–1 mm;
corolla dark pink to rose pink, with 2 yellow lines and dark pink spots in abaxial throat, 18–30 mm, throat pilose externally and villous within across bases and sinus of adaxial lobes, lobes: abaxial spreading, adaxial reflexed-spreading, 6–10 mm, abaxial pilose externally, adaxial glabrous externally;
proximal anthers parallel to filaments, distal perpendicular to filaments, pollen sacs 2.2–4 mm;
style exserted, 11–17 mm.
globular, 4–7 mm.
globular, 4–5 mm.
tan to brown, 0.5–1.5 mm.
dark brown to black, 0.5–0.8 mm.
= 28.
= 28.
Agalinis tenuifolia
Agalinis plukenetii
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Agalinis plukenetii can be bushy, relatively large, and showy. Agalinis plukenetii is a common component of dry to xeric roadsides in the southern portions of its range. It readily colonizes open, dry ground with very little vegetation. It was reported in South Carolina (F. W. Pennell 1935) based on a specimen that has little label data; its occurrence there is doubtful.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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