Hypericum denticulatum

Walter

Fl. Carol., 190. 1788.

Common names: Coppery St. John’s wort
EndemicIllustrated
Synonyms: Hypericum angulosum Michaux ex Willdenow H. denticulatum var. ovalifolium (Britton) S. F. Blake H. laevigatum Lamarck H. virgatum var. ovalifolium Britton
Treatment appears in FNA Volume 6. Treatment on page 89. Mentioned on page 88.

Herbs perennial, erect, branching at usually aerenchymatous base and in inflorescence, 2–7 dm. Stems: internodes 4-lined. Leaves (main-stem) spreading to appressed, sessile; blade usually broadly to narrowly ovate, rarely elliptic or lanceolate, 4–20 × 5–15 (–18) mm, mostly shorter than internodes, leathery, margins plane, apex acute to subrounded, densely gland-dotted, basal veins 1–5, if 1, midrib with 2–3 pairs of branches. Inflorescences broadly pyramidal to corymbiform, to 25-flowered, branching mostly dichasial. Flowers 5–13 mm diam.; sepals ovate or lanceolate to elliptic or obovate, subequal, 3–8 × 1.5–4 mm, margins sometimes ciliate, not setulose-ciliate, apex acute; petals orange-yellow, obovate, 5–10 mm; stamens 50–80, irregularly grouped; styles 2–4 mm; stigmas clavate. Capsules ovoid to rostrate-subglobose, 3–5 × 2–3 mm. Seeds 0.4–0.7 mm; testa obscurely linear-reticulate to finely ribbed-scalariform.


Phenology: Flowering summer–early fall (Jun–Sep).
Habitat: Wet woods, marshes, bogs
Elevation: 0–400 m

Distribution

V6 148-distribution-map.jpg

Ala., Del., Ga., N.J., N.Y., N.C., Pa., S.C., Tenn., Va.

Discussion

D. H. Webb (1980) regarded the disjunct populations in North Carolina and Tennessee as possible relicts and the Alabama one as due to recent introduction. J. R. Allison (2011) agreed and, in his opinion, the Pennsylvania and Virginia records are historical, and Hypericum denticulatum is likely adventive in Georgia.

Lower Taxa

None.

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

... more about "Hypericum denticulatum"
reddish +  and black +
yellow;orange +
oblong;ellipsoid +
gland-dotted +
acute;acute;subrounded +
Norman K. B. Robson +
Walter +
striate +  and smooth +
punctiform +
distinct +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2 cm20 mm <br />0.02 m <br />) +
lanceolate +, elliptic +  and ovate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
ovoid;rostrate-subglobose +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Coppery St. John’s wort +
Ala. +, Del. +, Ga. +, N.J. +, N.Y. +, N.C. +, Pa. +, S.C. +, Tenn. +  and Va. +
0–400 m +
connate +  and distinct +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Wet woods, marshes, bogs +
dichasial +, branching +, corymbiform +  and 25-flowered +
axillary +  and terminal +
terete +  and angled +
persistent +  and deciduous +
spreading;appressed +
not setulose-ciliate +  and ciliate +
glandular-ciliate +
(2-)3(-4)-merous +
axile +  and parietal +
glanduliferous +
contorted +  and imbricate +
orange-yellow +
persistent +
distinct +
obovate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering summer–early fall (Jun–Sep). +
Fl. Carol., +
allison2011a +
interrupted +  and continuous +
not carinate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (?) +  and 0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +
persistent +
connate +  and distinct +
lanceolate;elliptic or obovate +
subequal +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Endemic +  and Illustrated +
persistent +
expanded +  and minute +
connate +  and distinct +
elongate +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
Hypericum angulosum +, H. denticulatum var. ovalifolium +, H. laevigatum +  and H. virgatum var. ovalifolium +
Hypericum denticulatum +
Hypericum sect. Brathys +
species +
ribbed-scalariform +
reticulate +  and foveolate +
hairy +  and glabrous +
6 +, 9 +  and 7 +