Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Arnoglossum platagineum Raf.
- Family: Aster (Asteraceae)
- Flowering: June-August
- Field Marks: This species has a basal cluster of large, oval, strongly veined leaves and several
short-cylindrical heads of white flowers.
- Habitat: Prairies, roadsides, bogs, damp pastures, and along railroads.
- Habit: Rather coarse perennial herb with thickened rootstocks.
- Stems: Upright, stout, usually unbranched, angled, smooth, up to 6 feet tall.
- Leaves: Of 2 kinds: basal leaves oval to ovate, rounded or pointed at the tip, tapering to the long-stalked base, up to 8 inches long, up to 3 inches wide, without teeth, smooth, strongly 5- to 9-nerved;
leaves on upper part of stem alternate, smaller, with short or no leaf stalks, and a few teeth near the
- Flowers: 5 in heads, with numerous heads in a terminal, branched cluster; each head short-cylindrical,
about 1/6-1/4 inch high, subtended by very narrow, green bracts; flowers all tubular.
- Sepals: 0.
- Petals: 5, white, united to form a tube.
- Stamens: 5.
- Pistils: Ovary inferior.
- Fruits: Achenes oblongoid, smooth.
- Notes: This species has been known as Cacalia plantaginea and Cacalia tuberosa.
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