Liatris tenuifolia
Liatris laevigata
pine-needle gayfeather, shortleaf blazing star, shortleaf gayfeather
clusterleaf gayfeather, shortleaf blazing star
glabrous or sparsely pilose.
glabrous.
basal and proximal cauline (arising from separated nodes) 1-nerved, linear to linear-lanceolate, 100–300 × 1–2(–2.5) mm, gradually or abruptly reduced distally, essentially glabrous, gland-dotted (proximal margins sometimes ciliate).
basal and proximal cauline (mostly arising from congested nodes) 1-nerved, lance-linear to linear, 100–380 × (1–)2–6(–9) mm, abruptly reduced distally, glabrous (minutely white-dotted by stomates), weakly, if at all, gland-dotted (glandular hairs usually not evident).
(ascending) 1–7 mm.
(ascending) 1–7 mm.
turbinate-campanulate, 5–7 × 4–5 mm.
turbinate-campanulate, 5–7 × 4–5 mm.
4–6;
corolla tubes glabrous inside.
3–5;
corolla tubes glabrous inside.
in 2–3(–4) series, lanceolate to oblong or elliptic-oblong, unequal, essentially glabrous, margins with (pinkish purple) hyaline borders, apices usually rounded-retuse and minutely involute-cuspidate to apiculate.
in 2–3(–4) series, lanceolate to oblong or elliptic-oblong, unequal, essentially glabrous, margins with hyaline borders, apices usually rounded-retuse and minutely involute-cuspidate to apiculate.
in compact, racemiform arrays.
in compact, racemiform arrays.
2.5–4 mm;
pappi: lengths ± equaling corollas, bristles barbellate.
2.5–4 mm;
pappi: lengths ± equaling corollas, bristles barbellate.
globose.
globose.
Liatris tenuifolia
Liatris laevigata
R. P. Wunderlin (1998) treated Liatris laevigata and L. tenuifolia as varieties in one species; A. Cronquist (1980, p. 207) also treated them within one species, as “two well-marked but wholly confluent geographic vars.” They have been noted to grow intermixed in Osceola County, Florida (L. laevigata, Ray et al. 10472, NCU; L. tenuifolia, Ray et al. 10423, NCU). Unequivocal intermediates have not been seen in the present study. With the observation of consistent morphologic differences in habit, vestiture, and leaf punctation, and their broad sympatry in Florida, it seems appropriate to recognize them at specific rank.
Liatris laevigata is restricted to peninsular Florida and immediately adjacent Georgia (e.g., Floyd’s Island, Charlton County, Cypert 240, SMU). Leaf width is markedly variable, and collections of narrow-leaved forms sometimes have been identified as L. tenuifolia. Narrow-leaved forms of L. laevigata apparently are more common in southern Florida (Collier, Dade, Glades, Lee, Monroe, Okeechobee, Palm Beach, and Polk counties). Broader-leaved plants apparently tend to have larger corms, which may be related to age or habitat.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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