Hypericum gymnanthum

clasping-leaf st. john's-wort, claspingleaf st. johnswort
Family

Clusiaceae

Leaf Arrangement

opposite

Leaf Attachment

sessile, clasping

Leaf Margin

entire

Leaf Type

simple

Leaf Shape

lanceolate, cordate, deltoid, ovate

Growth Form

forb

Flower Color

yellow

Flower Petals

5

Flower Month

June - September

Height (meters)

0.1 - 0.9

Milky Sap

No

Armed/Unarmed

Unarmed

Origin

native

Lifespan

perennial

Growing Season

Warm season


Wetland Class

FACW

Prairie Coefficient of Conservatism

5

Field Characters

May be distinguished by its small 4 petaled flowers, clasping leaves that are spreading and not ascending, and its stems which are usually not branched. The Hypericums have punctate or gland-dotted leaves that are opaque if held up to the light. 5-7 prominent nerves in clasping leaves. Single stem, dichotomously branched inflorescence with no leaves. Plants woody.

Cultural Information

Seed germination is improved by cold/moist stratification (Steffen 1997).

Natural History

Found in sandy soils in barrens, low ground, and coastal prairies mostly throughout Louisiana and south-central and southeast Texas.

Habitat

Bogs, savannahs, in sandy soils in barrens or low ground.