Agalinis setacea

(J. F. Gmelin) Rafinesque

New Fl. 2: 64. 1837.

Common names: Threadleaf false foxglove
IllustratedEndemic
Basionym: Gerardia setacea J. F. Gmelin Syst. Nat. 2: 928. 1792
Synonyms: Agalinis holmiana (Greene) Pennell G. holmiana Greene
Treatment appears in FNA Volume 17. Treatment on page 552. Mentioned on page 537, 547, 553.

Stems branched, 15–72 cm, bushy; branches spreading-ascending, terete to quadrangular proximally, quadrangular-ridged distally, glabrous or sparsely scabridulous. Leaves spreading or arching; blade filiform to sometimes narrowly linear, 10–45 x 0.2–1 (–1.5) mm, not fleshy, margins entire, abaxial midvein occasionally scabridulous, adaxial surface finely scabrous; axillary fascicles absent or shorter than subtending leaves. Inflorescences racemes, sometimes interrupted by floriferous branches, flowers 2 per node; bracts shorter than or nearly equal to pedicels. Pedicels ascending-spreading, (5–) 10–35 mm, glabrous. Flowers: calyx turbinate-obconic, tube 2.2–4.4 mm, glabrous, lobes triangular-subulate, 0.3–0.9 mm; corolla pink to rosy pink, with 2 yellow lines and red spots in abaxial throat, (9–) 13–22 mm, throat pilose externally and villous within across bases and sinus of adaxial lobes, lobes: abaxial spreading to reflexed, adaxial reflexed, 3.5–7 mm, pilose externally throughout or only proximally; proximal anthers parallel to filaments, distal perpendicular to filaments, pollen-sacs 2–3.2 mm; style exserted, 8–15 mm. Capsules elliptic-ovate, 3–4 mm. Seeds black, 0.4–0.7 mm. 2n = 28.


Phenology: Flowering Aug–Oct.
Habitat: Dry sandy soils, pine savannas, margins of pine-oak woodlands and scrub, sand hills, roadside embankments.
Elevation: 0–500 m.

Distribution

Ala., Del., D.C., Fla., Ga., Md., N.J., N.Y., N.C., S.C., Tenn., Va.

Discussion

Agalinis setacea is most common in North Carolina, South Carolina, and Virginia, and is much more rare or localized in other states.

Agalinis setacea is largely replaced toward the south and west on the coastal plain by A. plukenetii. Plants similar to A. setacea but with more slender leaves and stems, longer internodes, and racemes similar to those in A. plukenetii occur from the mid-western peninsula of Florida near Tampa east to Lake Wales area south to Sebring. F. W. Pennell (1920, 1929) referred these plants to A. stenophylla Pennell. That species may warrant recognition based on the examination of specimens from Tampa and along the Lake Wales Ridge.

Selected References

None.

Lower Taxa

None.
... more about "Agalinis setacea"
spreading +  and reflexed +
rounded +  and gibbous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Judith M. Canne-Hilliker† +  and John F. Hays +
(J. F. Gmelin) Rafinesque +
Gerardia setacea +
fleshy +, rigid +  and not leathery +
spreading-ascending +
scabridulous +
quadrangular-ridged +, terete +  and quadrangular proximally +
turbinate-obconic +
elliptic-ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Threadleaf false foxglove +
bilabiate +  and symmetric +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
red spots +, pink +  and rosy pink +
subrotate +, cylindric +, club--shaped +, salverform +, campanulate +  and tubular +
1.3 cm13 mm <br />0.013 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Ala. +, Del. +, D.C. +, Fla. +, Ga. +, Md. +, N.J. +, N.Y. +, N.C. +, S.C. +, Tenn. +  and Va. +
0–500 m. +
glabrate +  and lanate +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Dry sandy soils, pine savannas, margins of pine-oak woodlands and scrub, sand hills, roadside embankments. +
axillary +  and terminal +
alternate +, subopposite +  and opposite +
deciduous +
arching +  and spreading +
yellow;yellow;yellow +
triangular-subulate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
scabridulous +
filiform to sometimes +
not fleshy +
0.2mm;1mm +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
scabridulous +
filiform to sometimes +
not fleshy +
0.2mm;1mm +
tenuinucellate +  and unitegmic +
campylotropous-like +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
ascending-spreading +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Flowering Aug–Oct. +
0.2 cm2 mm <br />0.002 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
spikelike +
60 +  and 600 +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Illustrated +  and Endemic +
subequal +
aerial +  and subterranean +
leaning +  and erect +
sericeous +, glabrate +, hispid +  and glabrous +
papillate +  and scabridulous +
15 cm150 mm <br />0.15 m <br /> (72 cm720 mm <br />0.72 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
scabridulous +
filiform to sometimes +
not fleshy +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
Agalinis holmiana +  and G. holmiana +
Agalinis setacea +
Agalinis +
species +
villous +  and pilose +
campanulate +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
perennial +  and annual +