American basket-flower
Also known as: American star-thistle, powderpuff thistle
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Morphology
- Stem
- Erect, sparingly branched above mid-stem, glabrous, minutely scabrous and minutely glandular.
- Leaves
- Alternate, simple, sessile, mostly entire, margins entire or minutely toothed, surfaces glabrous or scabrous, often dotted with minute yellow to brown glands; basal blades often absent at anthesis, oblanceolate to narrowly obovate, 4 to 8 inches long, .6 to 1.4 inches wide, angled or tapered to sharp point; cauline blades gradually reduced, ovate to lanceolate, mostly 2 to 4 inches long.
- Inflorescence
- Heads, hemispheric, borne singly at end of stem or branches, disciform, 1.2 to 3.2 inches across, showy. Involucres broadly hemispheric, 1 to 1.8 inches tall, wider than tall. Phyllaries many in 6-10 series, appressed, overlapping, of two distinct parts, lower part pale green, entire, upper part straw-colored, with a comb-like fringe of 9-15 stiff, parallel bristles.
- Flower
- Ray florets absent; discoid florets many, deeply 5-lobed, lobes linear; outer corollas larger, pink to occasionally purplish-red or rarely white, 1.4 to 2 inches, raylike, usually sterile; central corollas pinkish, .8 to 1 inch, usually fertile.
- Fruit
- Achenes, grayish brown to black, obovoid to oblong, .16 to .2 inch, somewhat flattened, glabrous or sparsely hairy; pappus bristles white, stiff, unequal, barbed, .24 to .55 inch.
Ecology
- Habitat
- Prairies, fields, roadsides, disturbed sites
- Distribution
- Collected in Meade, Neosho, Saline, and Woodson counties. Specimens from Meade and Neosho counties appear to be from introductions.
Practical Information
- Uses
- The Kiowa applied a poultice of leaves to skin sores (Moerman 1998).
Additional Notes
Comments
American basket-flower is not spiny though it is sometimes referred to as star-thistle or powderpuff thistle. The common name basket-flower alludes to the basket-like appearance of the overlapping phyllaries. It is sometimes cultivated as a garden ornamental.
Synonyms
Alternative scientific names that have been used for this plant.
Scientific Name: Centaurea americana
Full Citation: Centaurea americana Nutt.
Quick Facts
- Plant Type
- Wildflower
- Family
- Asteraceae - Sunflower Family
- Life Span
- Annual
- Height
- 20-80 inches
- Origin
- Native
- Last Updated
- 2021-11-19
Color Groups
Flowering Period
Blooms: June, July