1) Arenaceous plant 2) Flower 3) Moehringia mucosa 1) Longroot 
Sandwort is the common name of several plants, which may be members of the following genera: ...
• (n.) Any plant of the genus Arenaria, low, tufted herbs (order Caryophyllaceae.)
(from the article `Caryophyllales`) ...with sesame seeds and honey, is used in making the confection halvah. G. struthium is found in Europe and the United States and may have some ...
Sand'wort` noun (Botany) Any plant of the genus Arenaria , low, tufted herbs (order Caryophyllaceæ .) 
Sandwort (Arenaria) is a genus of plants of the family Caryophyllaceae, comprising low herbs with usually awl-shaped leaves and small white flowers.
[n] - loosely matted plant with mosslike foliage studded with tiny starry 4-petaled white blossoms 2. [n] - low-growing herb having clusters of small white-flowers 4-petaled flowers 3. [n] - low-growing chiefly perennial plants usually with small white flowers suitable for e.g. rock gardens
noun low-growing herb having clusters of small white four-petaled flowers