Contains 3 accepted taxa overall.

Characteristics
Arenaria L.
SANDWORT
Classification
CARYOPHYLLALES
Arenaria
Citation
ARENARIA Linnaeus, Sp. Pl. 423. 1753.
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TYPE: Arenaria serpyllifolia Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 52. 1913.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Arenaria lanuginosa SPREADING SANDWORT Native FAC (NWPL)
Arenaria serpyllifolia subsp. leptoclados THYMELEAF SANDWORT Not Native
Arenaria serpyllifolia subsp. serpyllifolia THYMELEAF SANDWORT Not Native UPL (NWPL)
[Family identification key]
1.  Perennial, often rhizomatous; leaves mostly 6-35 mm long, the blade 1-veined, linear-lanceolate to narrowly elliptic
1.  Annual; leaves 2-7 mm long, the blade 3- to 5-veined, ovate to narrowly lanceolate
2
2.  Fruit cylindric to cylindric-ovoid, not significantly broader at base (walls nearly straight); seeds ca. 0.4 mm long
2.  Fruit ovoid to ovoid-conic, broader at base; seeds 0.5-0.6 mm long
Genus Synonyms
Synonym Full Citation Basionym Type
Alsinanthus Alsinanthus Desvaux, J. Bot. (Paris) 3: 221. 1816. TYPE: = Arenaria Linnaeus 1753.
Alsinella Alsinella Gray, Nat. Arr. Brit. Pl. 2: 655. 1821, non Hill 1756, nec Moench 1794. TYPE: = Arenaria Linnaeus 1753.
Ballarion Ballarion Rafinesque, Amer. Monthly Mag. & Crit. Rev. 2: 266. 1818. TYPE: Spergulastrum lanuginosum Michaux
Brewerina Brewerina A. Gray, Proc. Amer. Acad. Arts 8: 620. 1869. TYPE: Brewerina suffrutescens A. Gray
Dufourea Dufourea Grenier, Actes Soc. Linn. Bordeaux 9: 25. 1837, non Acharius 1809, nec Bory ex Willdenow 1810, nec Kunth 1819. TYPE: Non designatus.
Eremogone Eremogone Fenzl, Vers. Darstell. Alsin. 13. 1833. TYPE: Non designatus.
Euthalia Euthalia (Fenzl ex Endlicher) Ruprecht, Mem. Acad. Imp. Sci. Saint Petersbourg 15(2): 220. 1869. BASIONYM: Arenaria Linnaeus, sect. Euthalia Fenzl ex Endlicher, Gen. Pl. 967. 1840. TYPE: Non designatus.
Gouffeia Gouffeia Robillard & Castagne ex Lamarck & de Candolle, Fl. France, ed. 3. 6: 609. 1815. TYPE: Gouffeia arenarioides Robillard & Castagne ex Lamarck & de Candolle
Gypsophytum Gypsophytum Adanson, Fam. Pl. 2: 256, 564. 1763. TYPE: = Arenaria Linnaeus 1753.
Odontostemma Odontostemma Bentham ex G. Don, Gen. Hist. 1: 449. 1831. TYPE: Odontostemma glandulosum Bentham ex G. Don
Plinthine Plinthine (Reichenbach) Reichenbach, Handb. Nat. Pfl.-Syst. 298. 1837. BASIONYM: Arenaria Linnaeus, sect. Plinthina Reichenbach, Fl. Germ. Excurs. 792. 1832. TYPE: Plinthine aggregata (Linnaeus) Reichenbach (Gypsophila aggregata Linnaeus)