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.
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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 +