Hypericum paucifolium

S. Watson

Proc. Amer. Acad. Arts Sci. 25: 143. 1890.

Treatment appears in FNA Volume 6. Treatment on page 95. Mentioned on page 88.

Herbs annual or perennial, erect or decumbent at base, not rooting, branches basal, relatively few or none, 1–7 dm. Stems: internodes 4-angled. Leaves erect to spreading, sessile; blade linear-oblong or linearlanceolate to linear, 5–33 × 0.5–2 mm, leathery, margins plane to revolute, apex acute, basal veins 1 (–3), midrib with (0–) 1–3 pairs of branches. Inflorescences narrowly V-shaped, 1–50-flowered, branching mostly dichasial. Flowers 10–15 mm diam.; sepals narrowly oblong to narrowly lanceolate, subequal to unequal, 3–7 × 0.8–1.6 mm, margins sometimes ciliate, not setulose-ciliate, apex acute; petals golden yellow to orange-yellow, red-tinged, oblanceolate to obovate, 6–10 mm; stamens 35–50, irregularly 3-fascicled; styles 2.5–5 mm; stigmas broadly capitate. Capsules ± narrowly ovoid-conic, 4–9 × 2–4 mm. Seeds 0.5–0.7 mm; testa finely linear-scalariform.


Phenology: Flowering spring.
Habitat: Dry, grassy habitats, roadsides
Elevation: 0–50 m

Discussion

The relatively long styles distinguish Hypericum paucifolium from all other North American species of sect. Trigynobrathys.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

... more about "Hypericum paucifolium"
reddish +  and black +
yellow;orange +
oblong;ellipsoid +
acute;acute +
Norman K. B. Robson +
S. Watson +
striate +  and smooth +
punctiform +
distinct +
0.5 cm5 mm <br />0.005 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
linearlanceolate +  and linear-oblong +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
ovoid-conic +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Tex. +  and Mexico +
0–50 m +
connate +  and distinct +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Dry, grassy habitats, roadsides +
dichasial +, branching +  and 1-50-flowered +
axillary +  and terminal +
winged +, 6-lined +, 4-lined +  and 2-lined +
persistent +  and deciduous +
erect;spreading +
not setulose-ciliate +  and ciliate +
glandular-ciliate +
plane +  and revolute +
(2-)3(-4)-merous +
axile +  and parietal +
glanduliferous +
contorted +  and imbricate +
red-tinged +, golden yellow +  and orange-yellow +
persistent +
distinct +
oblanceolate;obovate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering spring. +
Proc. Amer. Acad. Arts Sci. +
interrupted +  and continuous +
not carinate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +
persistent +
connate +  and distinct +
narrowly oblong;narrowly lanceolate +
subequal +  and unequal +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
connate +, distinct +  and fascicles +
persistent +
clavate +  and capitate +
expanded +  and minute +
connate +  and distinct +
elongate +
0.25 cm2.5 mm <br />0.0025 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
Undefined sect. Brathys +, Hypericum sect. Brathys +, H. sect. Spachium +, H. subsect. Spachium +, H. sect. Trigynobrathys +  and Sarothra sect. Trigynobrathys +
Hypericum paucifolium +
Hypericum sect. Brathys +
species +
linear-scalariform +
reticulate +  and foveolate +
perennial +  and annual +
decumbent +  and erect +
hairy +  and glabrous +
6 +, 9 +  and 7 +