Hypericum gentianoides

(Linnaeus) Britton
Prelim. Cat., 9. 1888.
Common names: Orange-grass pineweed
EndemicWeedy
Basionym: Sarothra gentianoides Linnaeus Sp. Pl. 1: 272. 1753
Synonyms: Brathys gentianoides (Linnaeus) Spach Hypericum nudicaule Walter
Treatment appears in FNA Volume 6. Treatment on page 95. Mentioned on page 88, 96.

Herbs annual, erect, branches strict, in distal 2/3 or from most nodes, 0.7–6 dm, wiry. Stems: internodes 4-lined. Leaves appressed, sessile; blade narrowly triangular-subulate to linear-subulate, scalelike, 1–4 × 0.4–0.6 mm, subcoriaceous to chartaceous, margins incurved, apex obtuse to rounded, basal vein 1, midrib unbranched. Inflorescences usually pyramidal, 1–24-flowered, branching mostly monochasial. Flowers 3–5 mm diam.; sepals lanceolate to narrowly oblong or linear-lanceolate, unequal, 1.5–2.5 × 0.4–0.8 mm, apex acute; petals orange-yellow to golden yellow, oblong, 2–4 mm; stamens 5–11, 5 separate or obscurely 5-grouped; styles 0.8–1.2 mm; stigmas broadly capitate. Capsules narrowly cylindric-conic, 4–5 × 1–1.2 mm, length 2–2.7 times sepals. Seeds 0.4–0.8 mm; testa markedly ribbed-scalariform. 2n = 24.


Phenology: Flowering late spring–fall (May–Oct).
Habitat: Dry, sandy soil in open woods, fields, roadsides, waste or rocky places, tall-grass prairie
Elevation: 0–500 m

Distribution

V6 164-distribution-map.jpg

N.S., Ont., P.E.I., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Ky., La., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis., introduced in West Indies (Dominican Republic), South America (Brazil, Paraguay), Europe (France).

Discussion

Hypericum gentianoides is smaller in all parts than H. drummondii and more branched. The relatively long, narrow capsule is diagnostic, as are the relatively small, often scalelike leaves.

Hypericum sarothra Michaux and Sarothra hypericoides Nuttall are illegitimate names that pertain here.

Selected References

None.

Lower Taxa

None.

... more about "Hypericum gentianoides"
Norman K. B. Robson +
(Linnaeus) Britton +
Sarothra gentianoides +
Orange-grass +  and pineweed +
N.S. +, Ont. +, P.E.I. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +, introduced in West Indies (Dominican Republic) +, South America (Brazil +, Paraguay) +  and Europe (France). +
0–500 m +
Dry, sandy soil in open woods, fields, roadsides, waste or rocky places, tall-grass prairie +
Flowering late spring–fall (May–Oct). +
Prelim. Cat., +
Endemic +  and Weedy +
Brathys gentianoides +  and Hypericum nudicaule +
Hypericum gentianoides +
Hypericum sect. Brathys +
species +