Agalinis homalantha

Pennell

Proc. Acad. Nat. Sci. Philadelphia 73: 525. 1922.

Common names: San Antonio false foxglove
Endemic
Synonyms: Agalinis nuttallii Shinners Gerardia homalantha (Pennell) Pennell G. longifolia Nuttall 1835
Treatment appears in FNA Volume 17. Treatment on page 545. Mentioned on page 537, 546.

Stems simple or branched, 30–100 cm; branches ascending, obtusely quadrangular proximally, quadrangular-ridged distally, scabrous. Leaves spreading-ascending; blade narrowly linear to linear, 14–35 (–40) x 0.6–1.5 mm, not fleshy, margins entire, abaxial midvein scabrous, adaxial surface scabrous; axillary fascicles usually to 1/2+ as long as subtending leaves, sometimes absent. Inflorescences racemes, flowers 1 or 2 per node; bracts shorter than or both shorter and longer than pedicels. Pedicels ascending, often arching upwards distally, 6–30 mm, scabrous, sometimes only proximally. Flowers: calyx funnelform to obconic, tube 3–5 mm, glabrous, lobes recurved, triangular-subulate, 0.6–1.5 mm; corolla dark-pink, with 2 yellow lines and dark purple spots in abaxial throat, 15–26 mm, throat pilose externally and glabrous within across bases of adaxial lobes, sparsely villous at sinus, lobes: abaxial projecting-spreading, adaxial arched over anthers, 2–6 mm, unequal, abaxial 4–6 mm, adaxial 2–4 mm, glabrous externally; proximal anthers perpendicular to filaments, distal oblique or perpendicular to filaments, pollen-sacs 3–4 mm; style exserted, 12–18 (–20) mm. Capsules globular, 5–7 mm. Seeds dark-brown to nearly black, 0.8–1.6 mm. 2n = 26.


Phenology: Flowering late Aug–early Oct.
Habitat: Dry, open woodlands, dry to xeric sandy terrace communities above streams, dry roadsides, open sandy habitats.
Elevation: 0–300 m.

Distribution

Ark., La., Miss., Okla., Tex.

Discussion

Agalinis homalantha is a common component of dry to xeric, open communities in Oklahoma and Texas and to a lesser extent in Louisiana. In Arkansas, populations are found from Fort Smith along the Arkansas River to the Mississippi River and southward to Bolivar County, Mississippi, where they are often associated with sandy terraces just downstream from dams and levees. Flooding of the sandbanks often carries seeds of A. homalantha well away from the streams, where it thrives in recently disturbed, weedy, sandy areas (J. F. Hays 1998).

Agalinis homalantha is distinguished from A. tenuifolia by its scabrous branches and pedicels; short, arched adaxial corolla lobes; prominent, wider yellow lines in the corolla; larger anthers with longer awns; and larger seeds.

Selected References

None.

Lower Taxa

None.

... more about "Agalinis homalantha"
projecting-spreading +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rounded +  and gibbous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Judith M. Canne-Hilliker† +  and John F. Hays +
Pennell +
narrowly linear +  and linear +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
not fleshy +
0.6mm;1.5mm +
shorter than or both shorter and longer than pedicels +
quadrangular-ridged +  and quadrangular +
obconic +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
San Antonio false foxglove +
bilabiate +  and symmetric +
dark-pink +  and dark purple +
1.5 cm15 mm <br />0.015 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
Ark. +, La. +, Miss. +, Okla. +  and Tex. +
0–300 m. +
glabrate +  and lanate +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Dry, open woodlands, dry to xeric sandy terrace communities above streams, dry roadsides, open sandy habitats. +
axillary +  and terminal +
alternate +, subopposite +  and opposite +
deciduous +
yellow;yellow;yellow +
triangular-subulate +
2-pinnatifid +, pinnatifid +  and cleft +
tenuinucellate +  and unitegmic +
campylotropous-like +
spikelike +
arching +  and ascending +
0.6 cm6 mm <br />0.006 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering late Aug–early Oct. +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
perpendicular +, oblique +  and distal +
Proc. Acad. Nat. Sci. Philadelphia +
spikelike +
60 +  and 600 +
dark purple +  and yellow +
1.5 cm15 mm <br />0.015 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
subequal +
branched +  and simple +
aerial +  and subterranean +
leaning +  and erect +
papillate +  and scabridulous +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Agalinis nuttallii +, Gerardia homalantha +  and G. longifolia +
Agalinis homalantha +
Agalinis +
species +
villous +, glabrous +  and pilose +
campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
perennial +  and annual +