Agalinis tenuifolia
Agalinis auriculata
gérardie à feuilles ténues, slender-leaf agalinis, slender-leaf false foxglove
earleaf false foxglove
simple or branched, 10–100 cm;
branches ascending to spreading, quadrangular, sharply ridged to winged distally, glabrate, sometimes scabrous.
simple or branched, (18–)30–100 cm;
branches spreading-ascending, obtusely angular, retrorsely short-sericeous and hispid.
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.
spreading;
blade lanceolate, 12–60 x (2–)5–20(–25) mm, margins and midveins entire or mid to distal ones with 1 or 2 proximal lobes, hispid, adaxial surface scabrous;
axillary fascicles absent.
racemes, elongate, flowers 2 per node;
bracts shorter than, or longer than, or both shorter and longer than, pedicels.
spikelike racemes, flowers 1 or 2 per node;
bracts longer than pedicels, margins with 1 or 2 proximal lobes.
ascending-spreading, some upcurved distally, 6–25 mm, glabrous.
ascending, 0.5–3 mm, hispid.
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 campanulate, tube (2–)3–9 mm, hirsute, lobes ovate-lanceolate, (5–)7–13 mm, unequal;
corolla pink, usually without 2 yellow lines and with dark pink spots in abaxial throat, 16–30 mm, throat pilose externally, villous within across bases and sinus of adaxial lobes, lobes: abaxial projecting to spreading, adaxial erect to recurved, 4–8 mm, abaxial sparsely pilose externally, adaxial glabrous externally;
proximal anthers parallel to filaments, distal perpendicular to filaments, pollen sacs 1.2–3 mm;
style exserted, 15–16 mm.
globular, 4–7 mm.
ovoid, 7–20 mm.
tan to brown, 0.5–1.5 mm.
brown, 1–2 mm.
= 28.
= 26.
Agalinis tenuifolia
Agalinis auriculata
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 auriculata is rare throughout its relatively broad range and has been the focus of recent field studies. It is probably extirpated in the District of Columbia, Michigan, New Jersey, Texas, and West Virginia; it was rediscovered in Pickens County, Alabama, in 2007 and Lewis County, Kentucky in 1998. The species is considered critically imperiled in at least 11 states and imperiled in another five and is the species is most abundant in Illinois, eastern Iowa, and northern Missouri.
Agalinis auriculata is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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