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Published In: Supplementum Plantarum 373. 1781[1782]. (Apr 1782) (Suppl. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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1. Aster tataricus L.f. (Tatarian aster)

Map 961

Plants perennial herbs, with stout rootstocks, often densely colonial from relatively thick, somewhat fleshy rhizomes. Stems 1 to several, 50–200 cm long, erect or ascending, often with several to numerous ascending branches above the midpoint, moderately to densely roughened, with short, broad-based hairs toward the tip, glabrous to sparsely hairy toward the base. Basal leaves persistent at flowering, robust, mostly 30–50 cm long, 3–10 cm wide, the blade oblanceolate to narrowly elliptic, narrowed or short-tapered to a sharply pointed tip, long-tapered to the base, the margins shallowly toothed, the surfaces and margins roughened with sparse to moderate, short, broad-based hairs. Stem leaves gradually reduced toward the tip, 3–30 cm long, narrowed or short-tapered to a sharply pointed tip, tapered to a sessile, somewhat sheathing but not strongly clasping base, the margins entire to shallowly toothed, the surfaces and margins roughened with sparse to moderate, short, broad-based hairs. Inflorescences often elongate panicles (rarely reduced to a solitary terminal cluster), the heads in flat-topped to somewhat rounded clusters at the ascending branch tips, the bracts relatively numerous, leaflike, linear to narrowly oblong-elliptic or narrowly oblanceolate. Heads radiate, not sticky or resinous. Involucre 7–12 mm long, cup-shaped to slightly bell-shaped. Involucral bracts in 3 or 4 unequal, overlapping series, linear to narrowly lanceolate, the tip ascending and often somewhat purplish-tinged, poorly differentiated into a green central band and lighter margins, the margins sometimes somewhat irregular, occasionally sparsely hairy toward the tip, the outer surface glabrous or sparsely hairy. Receptacle flat or slightly convex, with minute, irregular ridges around the concave attachment points of the florets. Ray florets 15–30, pistillate, the corolla 10–15 mm long, pale lavender to purple or purplish blue. Disc florets 25–50, perfect, the corolla 4–6 mm long, yellow, often turning purplish after the pollen has been shed, not persistent at fruiting. Pappus of the ray and disc florets similar, of numerous capillary, finely barbed bristles in 2 similar series, 6–8 mm long, white or cream-colored. Fruits 1.5–2.0 mm long, narrowly obconical, not or only slightly flattened, 4–6-ribbed, glabrous to finely hairy, light brown to tan. 2n=54. September–November.

Introduced, uncommon and sporadic, mostly near urban areas (native of Europe, Asia, introduced sporadically in the eastern U.S. west to Iowa and Missouri). Banks of streams; also gardens and moist, disturbed areas.

Tatarian aster is a striking and robust plant that is grown as an ornamental in gardens. Under some conditions, it can be relatively aggressive, forming dense colonies from the rhizomes. This species was first reported from Missouri by Yatskievych and Summers (1993) based on collections made in the 1970s in Jefferson County by James Solomon of the Missouri Botanical Garden.

 
 


 

 
 
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