Plant Database

From the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Breeding System: Flowers Bisexual
Inflorescence: Panicle
Size Notes: 30-120 cm. (Webref 3).
Leaf: Leaves light green, thin to firm; basal withering by flowering, sessile, blades oblanceolate, 10-40 x 3-10 mm, attenuate, margins usually entire, rarely remotely serrate, piloso-ciliate, apices obtuse, rounded to mucronulate, faces sparsely to moderately strigose; proximal cauline sometimes persistent by flowering, sessile, blades linear or oblong to elliptic-oblanceolate, 40-60 x 3-10 mm, bases rounded or slightly clasping, margins entire, scabrous, apices acute to obtuse, faces more or less copiously hirsute; distal sessile, blades oblanceolate, 15-45 x 2-3(-4.5) mm, progressively reduced distally, bases cuneate, margins entire, apices acute, white-spine-tipped, faces sparsely strigose. (Webref 3).
Flower: Ray florets 20-35; corollas azure blue to violet or lavender, laminae 5-10 x 0.6-1.2 mm. Disc florets 20-30+; corollas light yellow turning pinkish to purple, 3-4 mm, tubes ca. 1/2 narrowly funnelform throats, lobes triangular, 0.5-0.7 mm, glabrous. (Webref 3).
Fruit: Cypselae dull purple or brown, obovoid, not compressed, 1.5-2 mm, 7-9-nerved, faces densely sericeous; pappi tan to tawny, sometimes rose to violet-tinged, 3.5-5.5 mm. (Webref 3).

Bloom Information

Bloom Color: Blue , Purple , Violet
Bloom Time: Aug , Sep , Oct

Distribution

USA: CO , CT , IA , IL , IN , KY , MA , MD , MN , MO , ND , NE , NJ , NY , PA , RI , VT , WA , WI
Canada: ON
Native Habitat: Fields, prairies, disturbed grounds; 200-400 m. (Webref 3).

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Symphyotrichum ×amethystinum in USDA Plants
FNA: Find Symphyotrichum ×amethystinum in the Flora of North America (if available)
Google: Search Google for Symphyotrichum ×amethystinum