Minuartia uniflora
Minuartia cumberlandensis
one-flower stitchwort
Cumberland stitchwort
filiform.
filiform;
basal offshoots present.
erect to ascending, green, 7–20 cm, glabrous, internodes of stems 1–7 times as long as leaves.
erect or ascending, green, (8–)10–15(–20) cm, glabrous, internodes of flowering stems 0.8–1.2 times as long as leaves.
not overlapping, connate proximally, with tight, herbaceous or scarious sheath 0.1–0.3 mm;
blade straight to outwardly curved, widely spreading, green, flat, 1-veined abaxially, especially proximal, narrowly lanceolate to oblong, commonly linear, 2–20 × 0.3–1.5 mm, flexuous, margins not thickened, scarious, smooth, apex green to purple, rounded to acute, dull, glabrous;
axillary leaves poorly developed.
overlapping proximally, variably spaced distally, connate proximally, with ± loose, scarious sheath 0.1–0.2 mm;
blade spreading or ascending to outwardly curved, green, flat, 1-veined, linear-oblanceolate to linear-spatulate, (10–)20–30(–40) × 1–3 mm, flexuous, margins not thickened, minutely scarious, smooth, apex green, obtuse to broadly acute, shiny, glabrous, axillary leaves absent.
7–25+-flowered, open cymes;
bracts subulate to ovate, herbaceous, margins scarious.
flowers solitary, terminal, or 1–3-flowered cymes;
bracts narrowly lanceolate, herbaceous.
0.5–5 cm, glabrous.
12–30 cm, glabrous.
hypanthium disc-shaped;
sepals obscurely veined, ovate to elliptic or lanceolate (herbaceous portion elliptic to lanceolate), 2–3.5 mm, not enlarging in fruit, apex green, obtuse to rounded, not hooded, glabrous;
petals oblanceolate to spatulate, 1.5–2.5 times as long as sepals, apex rounded, entire to shallowly notched.
hypanthium dish-shaped;
sepals very weakly 3-veined, broadly oblong (herbaceous portion broadly oblong), 2–3 mm, not enlarging in fruit, apex green, obtuse or rounded, not hooded, glabrous;
petals oblong or obovate, 1.6–2 times as long as sepals, apex rounded to truncate, entire or slightly emarginate.
on stipe shorter than 0.1 mm, pyramidal-ovoid, 3.5–4 mm, longer than sepals.
broadly ovoid, (2–)3–3.5 mm, equaling or longer than sepals.
yellowish brown, suborbiculate with radicle obscure, slightly compressed, 0.4–0.6 mm, tuberculate;
tubercles low, rounded.
reddish brown, asymmetrically reniform with radicle prolonged into beak, not compressed, 0.5–0.7 mm, reticulate.
= 14.
= 20.
Minuartia uniflora
Minuartia cumberlandensis
Minuartia alabamensis was originally described to accommodate much-reduced plants from Alabama (J. F. McCormick et al. 1971). Subsequent studies have shown them to be conspecific with M. uniflora (R. Wyatt 1984).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Minuartia cumberlandensis may be most closely related to M. groenlandica and M. glabra; R. Kral (1983) noted that it may be distinguished from either of those taxa by leaf size and shape, seed sculpture, phenology, and habitat preference (shaded sandstone versus sunny granitic flat-rocks).
Minuartia cumberlandensis is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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