Conobea multifida (Michx.) Benth. - Fernald
Family - Scrophulariaceae
Stems - To 20cm tall (typically shorter), erect, herbaceous, branching, terete, densely glandular pubescent, from a taproot.
Leaves - Opposite, decussate, pinnatifid to bipinnatifid in the apical 1/2, glandular pubescent, to 1.8cm long, 1.3cm broad. Ultimate leaf divisions linear to oblong or oblanceolate, entire.
Inflorescence - Typically single flowers from upper leaf axils. Pedicels to 3mm in flower, slightly longer in fruit, densely glandular pubescent.
Flowers - Corolla bilabiate, pale blue to lilac, to +4mm long, glabrous externally, sparse pilose internally. Upper lip single-lobed. The lobe with a notched at the apex, to -2mm broad, -1mm long. Lower lip 3-lobed. The lobes mostly equal, to 1.2mm long. Corolla tube to 2.5-3mm long, expanded and white at the base. Stamens 4, didynamous, adnate near middle of corolla tube, included. Filaments to 1.3mm long, white, glabrous. Anthers pale yellow to white .1-.2mm broad. Ovary superior, green, glabrous, +/-1mm long in flower, ovoid, 2-locular. Ovules many. Placentation axile. Style 1.1mm long, glabrous, green. Stigma 2-lobed. Sepals 5, barely united at the base for -1mm, to +2mm long in flower, +4mm in fruit, .3mm broad, linear-attenuate, slightly spreading at the tips or erect, glandular pubescent. Calyx accrescent. Capsule green, glabrous, 2-valved.
Corolla and calyx.
Flowering - May - October.
Habitat - Gravel bars of streams, moist ground of fields and prairies, mud flats, low woods, roadsides.
Origin - Native to U.S.
Other info. - This is one
of those plants that most people would see as a weed in need of a good
shower of "Round-Up". Closer inspection, however, reveals a neat little
plant with very nice yet small flowers. The plant can be found throughout most of Missouri except may of the northern counties.
Photographs taken on the Current River, Shannon County, MO., 7-15-03.