| Family | CARYOPHYLLACEAE |
| Genus species | Arenaria mattfeldii Baehni ex J.F.Macbr. |
| Bibliography | Publ. Field Mus. Nat. Hist., Bot. Ser. 13(2): 601 (1937) |
| Native Range | Peru (Junín) |
| Primary Biome | Subalpine |
| Habitat | grassland |
| Altitude | 4000-4500m |
| Description | leaves 1-2mm, spirally arranged, 4-seriate, imbricate, succulent, subtriangular, obtuse, ciliate, flowers shortly pedicellate, amongst upper leaves, sepals 2mm, triangular |
| Size | 3-5cm |
| Color | |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | humous, moist, but in winter drier, semi-shady site alpine house, moist, humous soil, shading in summer |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 13-18°C division in early spring; cuttings in late summer |
| Territory | 8 Southern America 83 Western South America (PER Peru) |