Honckenya peploides subsp. robusta  (Arenaria p.) sea-beach sandwort Caryophyllaceae  HOPE; Q, rb;

  

Honckenya peploides var. robusta.Glen Mittelhauser.New England Wild Flower Society.gobotany-dev.herokuapp.com

Honckenya peploides var. robusta.Glen Mittelhauser.New England Wild Flower Society.gobotany-dev.herokuapp. (Accessed 4/2014).

Honckenya peploides subsp. robusta is a perennial, reclining, mat forming herb from rhizomes and runners rooted deeply in sand, stems 10-50 cm long, pale, succulent. 

Leaves opposite, each pair at right angles to next, blades yellow-green, 1-2 cm long, thick, stalkless, (sessile), tip pointed, bases broad almost meeting across stem, making ends of non-flowering stems appear cross-shaped if viewed end-on. 

Flowers whitish, small, 5-parted, unisexual, near ends of stems, male flowers with petals and sepals 0.3-0.7 cm, female flowers with petals to 0.2 cm long; blooming June-July. 

Fruit dry, hollow, a capsule 0.4-0.8 cm long, 0.5-1.2 cm wide, splitting into 3 sections to release many red-brown seeds, 0.3-0.5 cm long. 

Wetland status: FACU. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Beach dunes. 

Notes: Two other varieties or subspecies are found in the northwestern US and in Alaska (USDA, NRCS. 2004).