Echinacea angustifolia
Echinacea tennesseensis
blacksamson, blacksamson echinacea, narrow-leaf purple coneflower, purple coneflower
Tennessee purple coneflower
moderately to densely hairy (induments relatively harsh, hairs spreading, ca. 1–2 mm).
sparsely to densely hairy (indument relatively soft, hairs spreading, to 2+ mm).
mostly green to purplish.
yellowish green becoming tan.
petioles 2–12 cm;
blades (1-), 3-, or (5-)nerved, elliptic to lanceolate, 7–30 × 0.5–2.5(–4) cm, bases cuneate to attenuate, margins entire (usually ciliate).
petioles 2–10 cm;
blades 1- or 3-nerved, linear to lanceolate, 6–12 × 0.7–1.5 cm, bases attenuate, margins entire (usually ciliate).
10–30 cm.
8–25+ cm.
paleae 9–14 mm, tips purple, straight, sharp-pointed.
paleae 9–12 mm, tips purple, 2–3 mm, often incurved, rounded to acute.
pink to purplish, laminae reflexed, 15–40 × 5–8 mm, sparsely hairy abaxially.
pink to purplish, laminae spreading to reflexed, 20–40 × 3–4 mm, moderately hairy abaxially.
5–7+ mm, lobes usually purple.
5.5–6.5 mm, lobes usually purple.
lanceolate to ovate, 6–12 × 1–2.5 mm.
lanceolate to ovate, 5–10 × 1.5–2.5 mm.
often bicolored, tan proximally, dark brown banded distally, 4–5 mm, faces ± smooth, usually glabrous;
pappi to ca. 1 mm (major teeth 0–4).
tan, 4–5 mm, faces smooth, glabrous;
pappi to ca. 1.2 mm (major teeth 0–4).
conic to hemispheric, 15–30 × 20–35 mm.
conic, 10–25 × 15–25 mm.
= 22, 44.
= 22.
Echinacea angustifolia
Echinacea tennesseensis
R. L. McGregor (1967, 1968) recognized Echinacea angustifolia var. strigosa as a complex of diploid and tetraploid populations ranging geographically from southeastern Kansas and central Oklahoma to north-central Texas. He noted that var. strigosa is distinguishable by its shorter stature, stems frequently branched, somewhat flexuous, distally strigose to strigose-hirsute that retain, in part, a green color upon drying. A hybrid origin for var. strigosa was suggested based on the morphologic intermediacy of natural populations compared to synthesized hybrids between typical E. angustifolia and E. atrorubens (McGregor 1968). Populations along the southern boundary of the range of var. strigosa are tetraploid. In their morphometric analyses, S. E. Binns et al. (2002) did not recognize var. strigosa; they found it indistinguishable from typical E. angustifolia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Echinacea tennesseensis is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
KS Wildflowers
MN Wildflowers
MO Plants
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
