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Asteraceae

Echinacea angustifolia DC.

Kingdom: Plantae Rank: Species Parent: Echinacea Status: Invalid Reason: unverified

Common Names:

  • BLACKSAMSON - English, United States of America

Morphological Description

Diagnosis: Leaf blades gradually tapering to base, lanceolate to lanceolate-linear or narrowly elliptic, the basal and lower ones usually > 5 times as long as wide, 1–4 (+) cm wide, entire; native species; ligules light purple to pink or white; 2–4 cm long when fully expanded, spreading, 1–1.5 times as long as breadth of disk; plants 0.2–0.7 m tall; pollen yellow.

Other

Notes: Gravelly or rocky limestone prairies (on mixed sand and gravel farther w); Blackland Prairie w to Plains Country and s to Edwards Plateau. May–Jun. [E. pallida var. angustifolia (DC.) Cronquist] Barkley (1986) indicated that this species grades into E. pallida to the e; Cronquist (1980) and Gandhi and Thomas (1989) treated it as a variety of E. pallida. We are following McGregor (1968a) and Baskin et al. (1993) in recognizing it at the specific level. It is sometimes split into 2 varieties based on pubescence characters (e.g., McGregor 1968a; Kartesz 1994; Jones et al. 1997). Variety strigosa McGregor is said to differ in having consistently strigose or strigose-hirsute leaves and upper stems. While numerous individuals annotated as both variety angustifolia and variety strigosa are known from nc TX, virtually all are ± strigose or strigose- hirsute. We are thus not distinguishing varieties. (angustifolia: narrow-leaved)