Minuartia uniflora
Minuartia groenlandica
one-flower stitchwort
Greenland stitchwort, minuartie du groenland, mountain sandplant, mountain sandwort
filiform.
filiform to slightly thickened.
erect to ascending, green, 7–20 cm, glabrous, internodes of stems 1–7 times as long as leaves.
ascending to erect, green, 3–10 cm, glabrous, internodes of all stems 2–4 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 (basal rosette), perfoliate, connate proximally, with ± tight, herbaceous to scarious sheath 0.5–1 mm;
blade erect to spreading, green, weakly 1-veined abaxially, flat, ± linear, 4–12(–15) × 0.5 mm, flexuous, margins not thickened, slightly scarious to herbaceous, smooth, apex green, rounded, dull, glabrous;
axillary leaves absent.
7–25+-flowered, open cymes;
bracts subulate to ovate, herbaceous, margins scarious.
3–5-flowered, open, leafy cymes or sometimes solitary, terminal;
bracts linear to subulate, mostly herbaceous.
0.5–5 cm, glabrous.
0.2–1(–2) 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 disc-shaped;
sepals obscurely veined, elliptical-oblong to obovate (herbaceous portion elliptical-oblong to obovate), 2–4.5 mm, not enlarging in fruit, apex green, obtuse to rounded, not hooded, glabrous;
petals clawed, broadly obovate, 2–2.2 times as long as sepals, apex rounded, shallowly notched.
on stipe shorter than 0.1 mm, pyramidal-ovoid, 3.5–4 mm, longer than sepals.
on stipe shorter than 0.1 mm, broadly ellipsoid, 5.5 mm, longer than sepals.
yellowish brown, suborbiculate with radicle obscure, slightly compressed, 0.4–0.6 mm, tuberculate;
tubercles low, rounded.
brown, obliquely triangular with adaxial groove, radicle prolonged into short beak, compressed, 0.5–0.8 mm, obscurely tuberculate.
= 14.
= 20.
Minuartia uniflora
Minuartia groenlandica
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.)
Minuartia groenlandica is morphologically very similar to M. glabra (Michaux) Mattfeld; the two are clearly separable by habit, phenology, and elevation at the southern end of the range of M. groenlandica (R. E. Weaver 1970).
E. Hultén (1964) confirmed the report of Minuartia groenlandica from a mountain in southern Brazil (Morro de Igreja, Santa Catarina). This remains the only report of Minuartia in South America.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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