Hypericum cistifolium

round-pod st. john's wort, roundpod st. johnswort
Family

Clusiaceae

Leaf Arrangement

opposite

Leaf Attachment

sessile

Leaf Margin

entire

Leaf Type

simple

Leaf Shape

oblong, elliptic, lanceolate

Growth Form

forb, shrub

Flower Color

yellow

Flower Petals

5

Flower Month

June - August

Height (meters)

0.2 - 0.9

Milky Sap

Yes

Armed/Unarmed

Unarmed

Origin

native

Lifespan

perennial

Growing Season

Warm season


Wetland Class

FACW

Prairie Coefficient of Conservatism

7

Field Characters

May be distinguished from the many other species of Hypericum by its papery textured leaves with a clasping base and keeled midnerve that continues into a wing along the stem. The leaves are distinctive with edges that are rolled down. Does not have an articulation at the base of leaf. Leaves not linear.

Cultural Information

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

Natural History

Not common in Louisiana (see range map) and extremely rare in southeast Texas. Round-pod St. John's wort ranges from Texas to Florida and north to North Carolina (Correll and Johnston 1979).

Habitat

Savannahs, ditches, and low pinelands, sandy soils.