The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links
Silene acaulis

moss campion, silène acaule

drooping catchfly, nodding campion, nodding catchfly

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.

Flowering stems

erect, leafy proximally, 3–6(–15) cm, old leaves persistent at base.

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

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
from FNA
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)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ME; NJ; NY; OR; WY; BC; Europe [Introduced in North America]
[BONAP county map]
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
S. antirrhina, S. aperta, S. armeria, S. bernardina, S. bridgesii, S. campanulata, S. caroliniana, S. chalcedonica, S. conica, S. coniflora, S. conoidea, S. coronaria, S. csereii, S. dichotoma, S. dioica, S. douglasii, S. drummondii, S. flos-cuculi, S. gallica, S. grayi, S. hitchguirei, S. hookeri, S. invisa, S. involucrata, S. kingii, S. laciniata, S. latifolia, S. lemmonii, S. marmorensis, S. menziesii, S. nachlingerae, S. nivea, S. noctiflora, S. nuda, S. occidentalis, S. oregana, S. ostenfeldii, S. ovata, S. parishii, S. parryi, S. pendula, S. petersonii, S. plankii, S. polypetala, S. pseudatocion, S. rectiramea, S. regia, S. repens, S. rotundifolia, S. sargentii, S. scaposa, S. scouleri, S. seelyi, S. serpentinicola, S. sibirica, S. sorensenis, S. spaldingii, S. stellata, S. subciliata, S. suecica, S. suksdorfii, S. thurberi, S. uralensis, S. verecunda, S. virginica, S. viscaria, S. vulgaris, S. williamsii, S. wrightii
S. acaulis, S. antirrhina, S. aperta, S. armeria, S. bernardina, S. bridgesii, S. campanulata, S. caroliniana, S. chalcedonica, S. conica, S. coniflora, S. conoidea, S. coronaria, S. csereii, S. dichotoma, S. dioica, S. douglasii, S. drummondii, S. flos-cuculi, S. gallica, S. grayi, S. hitchguirei, S. hookeri, S. invisa, S. involucrata, S. kingii, S. laciniata, S. latifolia, S. lemmonii, S. marmorensis, S. menziesii, S. nachlingerae, S. nivea, S. noctiflora, S. nuda, S. occidentalis, S. oregana, S. ostenfeldii, S. ovata, S. parishii, S. parryi, S. petersonii, S. plankii, S. polypetala, S. pseudatocion, S. rectiramea, S. regia, S. repens, S. rotundifolia, S. sargentii, S. scaposa, S. scouleri, S. seelyi, S. serpentinicola, S. sibirica, S. sorensenis, S. spaldingii, S. stellata, S. subciliata, S. suecica, S. suksdorfii, S. thurberi, S. uralensis, S. verecunda, S. virginica, S. viscaria, S. vulgaris, S. williamsii, S. wrightii
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)
Web links