Silene stellata
Silene sorensenis
starry campion, widow's frill
sorensen's catchfly, three-flower campion
several, simple proximal to inflorescence, 30–80 cm, puberulent, becoming subglabrous near base.
simple below flowering region, stout, 5–30 cm, pubescent, viscid-glandular, densely so distally, ciliate at nodes, hairs with purple septa.
withering proximally, in whorls of 4, ± sessile to short-petiolate, largest in mid-stem region;
blade lanceolate to ovate-lanceolate, 3–10 cm × 4–40 mm, apex acuminate, puberulent on both surfaces, sparsely so adaxially.
basal petiolate, tufted, petiole to length of blade, broad, blade oblanceolate, 1–8 cm × 2–8 mm, fleshy, base blunt, tapering into petiole, margins ciliate, apex ± acute, glabrous (rarely pubescent) on both surfaces;
cauline in 1–2 pairs, sessile, connate proximally, blade narrowly oblong-lanceolate, 5–30 × 1.5–5 mm, apex purple-tipped, ± acute, pubescence as in basal leaves.
paniculate, open, bracteate, bracteolate, branches elongate, puberulent;
bracts and bracteoles linear-lanceolate, 2–15 mm.
cymose, single, terminal, congested, 1–3-flowered, bracteate, rarely with 1 or 2 flowers in axil of mid-stem leaves (occasionally branched with 2 or 3 erect, elongate branches), densely woolly with purple septate hairs of various lengths, longest equaling pedicel diam.;
bracts leaflike, lanceolate, 4–10 mm.
straight, often with 1 or 2 pairs of bracteoles, slender, 1/2–3 times calyx, glabrous or scabrous-puberulous.
stout, usually much shorter than calyx, rarely to 2 times as long, or flowers sessile.
calyx obscurely 10-veined, broadly campanulate, becoming obtriangular in fruit, 7–11 × 6–10 mm, herbaceous, margins dentate, very narrow, membranous, sparsely puberulent, lobes broadly triangular, 2–3 mm;
corolla white, ca. 2 times longer than calyx, limb obtriangular, narrowed into claw, divided ca. 1/2 its length into 4–12 lobes, appendages absent;
stamens equaling petals;
styles 3, longer than petals.
calyx broadly 10-veined, ovate-campanulate, ca. 10 × 6 mm in flower, enlarging to 15 × 10 mm in fruit, base round, narrowed to ca. 1/2 its diam. at mouth, margins dentate, teeth purple, ovate-obtuse, ca. 2 mm, pubescence densely glandular, viscid, partially obscuring the broad veins;
corolla white to dingy pink, clawed, claw equaling calyx, limb obovate, 2-lobed, 3–5 mm, appendages 2, oblong, ca. 1 mm, margins crenulate;
stamens equaling petals;
styles 5, equaling petals.
globose, opening by 3 broadly triangular teeth;
carpophore 2–3 mm.
included in calyx, dehiscing by 5 teeth, often splitting into 10;
carpophore 1–1.5 mm.
dark brown, reniform, ca. 1 mm, papillate.
brown, not winged, triangular-reniform, ca. 1 mm, spinose-papillate.
= (34), 48.
= 72.
Silene stellata
Silene sorensenis
Silene stellata is a very distinct species with its broadly lanceolate leaves in groups of four at each node, and its brilliant white, multilobed petals. Two varieties are recognized by some workers: var. stellata, with glabrous pedicels; and var. scabrella, with scabrous pedicels. The former tends to have longer, more slender pedicels and be more common towards the northeast, whereas the latter tends to be more western. The correlation of characters and distribution is poor, however, and intermediate plants are often encountered.
Silene stellata was collected near the Grand River, Cambridge, Ontario, in 1941, but was probably introduced there and has not been seen since.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Silene sorensenis usually is readily separable from most other arctic silenes by the dense purplish pubescence that tends to obscure its calyx venation, the nonwinged seeds, and the congested flowers. Specimens of S. taimyrensis in the western arctic can resemble S. sorensenis but are distinguishable by their smaller seeds and calyx, more-slender stems, and hairs that are shorter than the diameter of the pedicel. Apparent hybrids with S. involucrata are occasionally encountered. A. Nygren (1951) considered S. sorensenis to be of amphidiploid origin involving S. uralensis and S. involucrata.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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