Orobanche uniflora L.
Family - Orobanchaceae
Stems - Parasitic on roots of other vascular plants, herbaceous, achlorophyllous, subterranean, thin, glabrous.
Leaves - Alternate, few, reduced to scales, whitish-tan, 2-3mm long, glabrous, ovate.
Inflorescence - Solitary flower on axillary pedicel to 15cm long. Pedicel glandular pubescent, erect.
Flower - Corolla typically
white, tubular, 2.2cm long, dense glandular pubescent, 5-lobed. Lobes to
6mm long, 4.5mm broad, with two yellow bearded strips alternating with
two bottom lobes. Stamens 4, adnate at base of corolla tube, alternating
with lobes. Filaments white, glabrous, to +4mm long. Anthers pale yellow,
1.1mm long. Style 7-8mm long, glabrous, tubular, expanded at apex. Stigma
two lobed. Calyx tube campanulate, 5-lobed. Tube to 4mm long, 5-6mm in diameter, dense glandular pubescent. Lobes attenuate,
to 5mm long, glandular pubescent.
Calyx and corolla.
Flowering - April - June.
Habitat - Wooded slopes, rocky open woods, rocky glades, base of bluffs.
Origin - Native to U.S.
Other info. - I like the
parasitic plants and this plant is no exception. It's a small plant but
easy to find because of the fairly large white flower. The big tubular
corolla with the yellow bearded strips is just screaming to be visited
by a bee or small wasp. The stems are short and thin and rarely seen unless
you dig a bit at the base of the pedicel.
Photographs taken in the Hercules Glade Wilderness, Mark Twain National Forest, Taney County, MO., 4-29-00.
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