Lobelia spicata Lam.
Family - Campanulaceae
Stems - Simple, erect, to +/-50cm tall, glabrous to variously pubescent, herbaceous, 4-5 angled.
Leaves - Mostly in lower
1/2 of stem, sessile or short petiolate (near base of stem), spatulate to
oblong, rounded at apex, entire to irregularly dentate (margins strigillose
to ciliate), +/-5cm long, +/-2cm broad, sparse strigose to glabrous.
Inflorescence - Terminal
spikiform raceme to +/-35cm long (tall). Each flower subtended by a lance-linear
to subulate bract to 1.5cm long, 3mm broad. Bracts typically glabrous.
Pedicels to 3mm long, glabrous to pubescent.
Flowers - Resupinate. Corolla
whitish to lilac, to 1.3mm long, 5-lobed. Three "upper" lobes to 4.1mm
long, 2mm broad, oblanceolate to lanceolate. Two "lower" lobes deflexed
to reflexed, 3mm long. Stamens 5, adnate at base of corolla tube. Filaments
white, pubescent at base. Anthers purplish-blue, connate around stigma.
Stigma purple, bearded at base. Style 1, 5mm long, glabrous, greenish.
Ovary ovoid-conic, slightly compressed, green, 2-locular. Placentation
axile. Calyx tube +/-1mm long, 5-lobed. Lobes auricled at base, 3mm long,
-1mm broad at base, linear-attenuate. Auricles various. Capsule to 8mm
long, +/-4mm in diameter, glabrous to pubescent.
Flower close-up.
Side-view.
Flowering - May - August.
Habitat - Prairies, glades, open woods, bluffs, wet meadows.
Origin - Native to U.S.
Other info. - This is a highly
variable species. The flowers can be bluish to white, the stems can be
glabrous to hispid, and the calyx lobes can have variable auricles at their
bases. The anthers of the plant can also be variable in color sometimes.
Steyermark breaks the species apart into 4 different varieties but these
varieties integrade and can be difficult to distinguish so I won't mention
them here.
Remember, the flowers are inverted (resupinate) on this plant so what looks like the top of the flower is actually the bottom and vice-versa.
Photographs taken at the Peck Ranch Wildlife Refuge, Carter County, MO., 7-12-03.
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