Jepson eFlora: Taxon page
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Arenaria paludicola

Higher Taxonomy
Family: CaryophyllaceaeView DescriptionDichotomous Key

Common Name: PINK FAMILY
Habit: Annual to perennial herb; rarely dioecious (Silene), taprooted or rhizome generally slender. Leaf: simple, generally opposite (subwhorled), entire, pairs at nodes often +- connected at bases; stipules generally 0; petiole generally 0. Inflorescence: generally cyme, generally open; flowers 1--many; involucre generally 0 (present in Dianthus, Petrorhagia). Flower: generally bisexual, radial; hypanthium often present but obscure; sepals (4)5, +- free or fused into a tube, margins generally scarious, more so on inner 2 or not, tube generally not scarious, awns generally 0; petals (4)5 or 0, generally tapered to base (or with claw long, limb expanded), entire to 2--several-lobed, limb generally without scale-like appendages adaxially, generally without ear-like lobes at base; stamens generally 10, generally fertile, generally free, generally from ovary base; nectaries 0 or 5; ovary superior, generally 1-chambered, placentas basal or free-central, styles 2--5 with 0 branches or 1 with 2--3 branches. Fruit: capsule or utricle (rarely +- dehiscent), generally sessile.
Genera In Family: 83 or 89 genera, 3000 species: widespread, especially arctic, alpine, temperate northern hemisphere; some cultivated (Agrostemma, Arenaria, Cerastium, Dianthus, Gypsophila, Lychnis, Sagina, Saponaria, Silene, Vaccaria). Note: Apetalous Caryophyllaceae can also be keyed in Rabeler & Hartman 2005 FNANM 5:5--8.
eFlora Treatment Author: Ronald L. Hartman & Richard K. Rabeler, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: ArenariaView DescriptionDichotomous Key

Common Name: SANDWORT
Habit: Annual, perennial herb, erect to mat-forming, taprooted. Leaf: not congested at base of flowering stems; blades narrowly lanceolate to ovate; veins 1--5. Inflorescence: terminal or axillary; flowers 1--many; peduncles, pedicels 1--50 mm. Flower: sepals 5, +- free, 1.5--4 mm, +- lanceolate to widely ovate, glabrous to glandular-hairy; petals 0 or 5, 1.5--6 mm, entire; stamens 10; styles 3, 0.5--2 mm. Fruit: capsule, ovoid to urn-shaped; teeth 6, ascending to recurved. Seed: 8--20, gray- or dark brown.
Species In Genus: 210 species: northern temperate, especially mountains, South America, Eurasia. Etymology: (Latin: sand, a common habitat) Note: Based in part on molecular evidence, most taxa moved to Eremogone.
Unabridged Note: Based in part on molecular evidence, taxa in 2 of McNeill's subgenera here included in Eremogone.

Arenaria paludicola B.L. Rob.
Habit: Perennial herb, erect or not, often supported by nearby pls, green. Stem: 25--90 cm, angled or grooved, shiny, glabrous except at nodes. Leaf: 20--55 mm, some 2--7 mm wide, +- lanceolate, narrowly acute; vein 1. Inflorescence: flower 1, axillary; pedicels 15--50 mm. Flower: sepals 2.8--3.5 mm, in fruit < 4 mm, obtuse to rounded; petals 5--6 mm.
Ecology: Wet meadows, marshes; Elevation: < 300 m. Bioregional Distribution: s CCo (Nipomo Mesa, San Luis Obispo Co.), SnFrB (extirpated), SCo (Santa Ana River); Distribution Outside California: Mexico. Flowering Time: Late spring--summer Note: Threatened by development.
eFlora Treatment Author: Ronald L. Hartman & Richard K. Rabeler
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Arenaria lanuginosa var. saxosa
Next taxon: Arenaria serpyllifolia var. serpyllifolia

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botanical illustration including Arenaria paludicola


Citation for this treatment: Ronald L. Hartman & Richard K. Rabeler 2017. Arenaria paludicola, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 23, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on September 23, 2017.

Geographic subdivisions for Arenaria paludicola:
s CCo (Nipomo Mesa, San Luis Obispo Co.), SnFrB (extirpated), SCo (Santa Ana River);
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.