Silene acaulis |
Silene pendula |
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moss campion, silène acaule |
drooping catchfly, nodding campion, nodding catchfly |
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Habit | Plants perennial, mat- or cushion-forming, subglabrous; taproot stout; caudex much-branched, becoming woody. | Plants annual, with several decumbent shoots; taproot slender. |
Stems | procumbent to ascending, branched, leafy, 15–45 cm, lanuginose, often sparsely so, viscid distally. |
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Flowering stems | erect, leafy proximally, 3–6(–15) cm, old leaves persistent at base. |
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Leaves | mostly basal, densely crowded and imbricate, sessile; blade 1(–3)-veined, linear-subulate to lanceolate, 0.4–1(–1.5) cm × 0.8–1.5(–2) mm, margins cartilaginous, often ciliolate especially proximally, apex acute, glabrous to scabrous. |
2 per node; proximal with blade obovate, spatulate, apex obtuse; distal sessile, blade ovate to lanceolate, 2–5 cm × 2–20 mm, apex acute, sparsely pubescent adaxially, more densely so abaxially. |
Inflorescences | solitary flowers. |
pseudoracemose, lax, solitary flowers in axils of leafy bracts. |
Pedicels | 2–40 mm. |
erect in flower, sharply deflexed at base in fruit, usually shorter than calyx, pilose and stipitate-glandular. |
Flowers | bisexual or unisexual, all plants having both staminate and pistillate flowers, others having only pistillate flowers, subsessile or borne singly on peduncle; calyx 10-veined, lateral veins absent, tubular to campanulate, (5–)7–10 mm, herbaceous, margins often purple tinged, dentate, sometimes ciliate, ± scarious, glabrous, lobes lanceolate to ovate, 1–2 mm; petals bright pink, rarely white, limb unlobed to shallowly 2-fid, 2.5–3.5 mm, base tapered into claw, auricles and appendages poorly developed; stamens exserted in staminate flowers, not so or aborted in pistillate flowers; styles 3. |
calyx prominently 10-veined, obovoid, especially in fruit, clavate, constricted around carpophore and narrowed at mouth, umbilicate, inflated, 13–18 mm, loose and papery, pubescence glandular and eglandular, sparsely lanuginose, veins parallel, green or purple, with pale commissures, lobes triangular, ca. 2 mm, apex obtuse; corolla bright pink, clawed, claw equaling calyx, limb obtriangular, 2-lobed, 7–11 mm, lobes divergent, ovate, appendages 2, shorter than 1 mm, apex acute; stamens slightly longer than petal claw; stigmas 3, equaling petals. |
Capsules | 3-locular, cylindric, equaling or to 2 times calyx, opening by 6 recurved teeth; carpophore ca. 1 mm. |
included in calyx, ovoid-conic, opening by 6 teeth; carpophore 3–6 mm. |
Seeds | light brown, reniform, 0.8–1(–1.2) mm broad, dull, shallowly rugose. |
dark brown, broadly reniform, 1.3–1.5 mm, with concentric crescents of shallow tubercles on both sides, margins with larger, deeper tubercles. |
2n | = 24. |
= 24 (Europe). |
Silene acaulis |
Silene pendula |
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Phenology | Flowering early summer. | Flowering early summer. |
Habitat | Arctic and alpine tundra, gravelly, often wet places, rocky ledges | Roadsides |
Elevation | 0-4200 m (0-13800 ft) | 0-2900 m (0-9500 ft) |
Distribution |
AK; AZ; CO; ID; ME; MT; NH; NM; NV; NY; OR; UT; WA; WY; AB; BC; NL; NS; NT; NU; ON; QC; SK; YT; Greenland; Europe; Asia (Russian Far East)
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CA; ME; NJ; NY; OR; WY; BC; Europe [Introduced in North America] |
Discussion | Silene acaulis is a variable species, and most workers have recognized infraspecific taxa in North America: subsp. acaulis (subsp. exscapa and subsp. arctica), which is predominantly arctic; and subsp. subacaulescens, which extends down the Rocky Mountains from Alaska to Arizona and New Mexico. In subsp. acaulis, the leaves are flat and short and the flowers are subsessile and smaller in size. Subspecies subacaulescens is typically a larger, less-compact plant with longer, narrower leaves and larger, pedunculate flowers. However, in many populations, these two variants are poorly differentiated, and in others both occur together, connected by intermediates. Silene acaulis is widely distributed in arctic and alpine Europe. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Silene pendula is an attractive, rarely escaping and persisting garden plant readily recognized by its beautiful pink flowers, straggling leafy stems, racemelike inflorescences with axillary flowers, and the obovoid, papery, strongly veined calyx that is constricted below the middle. It is occasionally used in seeding roadsides. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 173. | FNA vol. 5, p. 198. |
Parent taxa | Caryophyllaceae > subfam. Caryophylloideae > Silene | Caryophyllaceae > subfam. Caryophylloideae > Silene |
Sibling taxa | ||
Synonyms | Cucubalus acaulis, S. acaulis subsp. arctica, S. acaulis var. exscapa, S. acaulis subsp. subacaulescens, S. exscapa, Xamilensis acaulis | |
Name authority | (Linnaeus) Jacquin: Enum. Stirp. Vindob., 78, 242. (1762) | Linnaeus: Sp. Pl. 1: 418. (1753) |
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