Nabalus crepidineus Michx.
Tall White Lettuce
Family - Asteraceae
Stems - Relatively stout, glabrous to moderately pubescent, often with purple mottling.
Leaves - With winged petioles, broadly ovate, usually coarsely and irregularly toothed, roughened or inconspicuously pubescent.
Upper stem leaf.
Lower stem leaf.
Inflorescence - Broad, elongate panicles, terminal and often from upper leaf axils, heads nodding.
Involucre - Green, 12-16 mm long, with 10-15 narrowly oblong inner bracts, pubescent with stout hairs.
Flowers - Ligulate florets 15-30, cream to light yellow; stamenal tubes and styles conspicuously exserted at anthesis.
Fruits - 5-6 mm long, yellowish to reddish brown, terete, beakless.
Flowering - August-October.
Habitat - Bottomland forests, banks of streams, moist depressions.
Origin - Native to U.S.
Other info. - This striking plant is known from a handful of Missouri counties, mostly toward the
eastern side of the state. It is often overlooked because it does not reliably bolt and bloom.
Basal leaves, arrowhead shaped with conspicuously winged petioles, can be found in bottomland forests in the springtime,
but most of these die back by midsummer without sending up flowering stems. However, populations which are found in flowering condition
will often flower reliably year after year.
Photographs taken near Dutzow, Warren County, MO, 9-16-2011, 10-2-2011, 9-20-2015, 9-3-2016, 10-5-2016, and 9-29-2017 (SRTurner).