Silene petersonii |
Silene williamsii |
|
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Peterson's campion or catchfly, plateau catchfly |
Williams' catchfly |
|
Habit | Plants perennial, rhizomatous; caudex thick, with many rhizomatous, creeping, branched, slender subterranean shoots, terminating in tight tufts of leaves and erect flowering stems. | Plants perennial; taproot slender; rootstock much-branched. |
Stems | simple, 5–15 cm, pubescent and viscid, with stipitate glands. |
several–many, decumbent to erect, much-branched and sometimes matted, leafy, 5–30 cm, pubescent and glandular, at least distally. |
Leaves | basal with blade 1-veined, oblanceolate, broadly spatulate, 1–4 cm × 2–8 mm, apex obtuse to acute, glandular-puberulent throughout, rarely subglabrous adaxially; cauline in 3–6 pairs, sessile, reduced distally, blade lanceolate, narrowly elliptic, or oblanceolate, 2–4 cm × 2–8 mm, apex ± acute, glandular-puberulent throughout. |
2 per node, leafy above, sessile; blade narrowly lanceolate to elliptic-lanceolate, broadest proximally, narrowed to base, 1–5 cm × 3–8 mm, apex acute, short-pubescent and ± glandular on both surfaces. |
Inflorescences | usually with solitary terminal flower, sometimes cymose, to 8-flowered, open. |
cymose, loose, leafy, compound, or flowers terminal, axillary in distal nodes. |
Pedicels | erect or angled near tip with flowers slightly nodding, 1–3 times longer than calyx, glandular-puberulent, often densely so. |
0.5–1(–3) cm, glandular-pubescent. |
Flowers | calyx prominently 10-veined, campanulate, not contracted proximally around carpophore, 15–20 × 4–8 mm, papery, margins dentate, veins parallel, usually purple tinged, with pale commissures; lobes ovate, 3–5 mm, glandular-puberulent, midrib triangular, margins purple tinged, broad, membranous, apex obtuse; corolla bright pink, clawed, claw equaling calyx, broad and ligulate but abruptly contracted into limb, limb broadly cuneate, shallowly to deeply 2–4-lobed, 5–15 mm, lobes broad or narrow, appendages absent or to 2 mm, margins erose; stamens slightly longer than corolla claw; stigmas 3(–5), slightly longer than corolla claw. |
unisexual, all plants having both staminate and pistillate flowers; calyx obscurely 10-veined, ovate-campanulate, 9–11 × 4–6 mm, herbaceous, papery, pubescence rather dense, glandular, ± obscuring veins, veins slender, without conspicuous pale commissures, lobes lanceolate, ca. 2 mm, apex acute to acuminate; corolla white, clawed, claw shorter than calyx, limb oblong, 2-lobed, 1.5–3 mm, lobes lanceolate, apex acute, appendages linear, 0.3–0.5 mm; stamens equaling corolla; stigmas 3, slender, equaling corolla, papillate only at tip. |
Capsules | equaling calyx, opening by 6 (or 8 or 10) lanceolate teeth; carpophore 1–2.5 mm. |
straw colored, ovoid-ellipsoid, slightly longer than calyx, opening by 6 teeth; carpophore ca. 1 mm. |
Seeds | brown, broadly reniform, flattened, 2–2.5 mm, rugose, more coarsely so on margins. |
dull brown, not winged, angular-reniform, ca. 1 mm, tuberculate. |
2n | = 96. |
= 24. |
Silene petersonii |
Silene williamsii |
|
Phenology | Flowering summer. | Flowering summer. |
Habitat | Calcareous gravel, clay, talus, and rocks on ridges, slopes, and barren ground | Heaths, disturbed ground, river gravel and bluffs, roadsides |
Elevation | 2000-3400 m (6600-11200 ft) | 100-700 m (300-2300 ft) |
Distribution |
NV; UT
|
AK; YT |
Discussion | Of conservation concern. This beautiful alpine species is variable with respect to density of pubescence, flower size, and petal structure. As this variation occurs both within and among populations, little useful purpose is served by giving names to it. The Nevada population, which is the basis for the name Silene clokeyi, is interfertile (A. R. Kruckeberg 1961) with populations in Utah (the basis for the name S. petersonii). Accordingly, a single species is recognized here without infraspecific taxa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Silene williamsii is similar to S. menziesii but is readily separated by its leaves, which are broadest below the middle, its dull tuberculate seeds, and its stigmas, which are papillate only at the tip. It is also monoecious instead of functionally dioecious. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 198. | FNA vol. 5, p. 213. |
Parent taxa | Caryophyllaceae > subfam. Caryophylloideae > Silene | Caryophyllaceae > subfam. Caryophylloideae > Silene |
Sibling taxa | ||
Synonyms | S. clokeyi, S. petersonii var. minor | S. menziesii subsp. williamsii, S. menziesii var. williamsii |
Name authority | Maguire: Madroño 6: 24. (1941) | Britton: Bull. New York Bot. Gard. 2: 168. (1901) |
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