esp US orach
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Orach, Orache, or′ach, n. one of several European plants used as spinach.
A third species—the Grass-leaved Orache (A. littoralis) grows in salt marshes.The Sea Shore|William S. Furneaux
Orache is frequently used as a substitute for Spinach where the ordinary variety fails.
Red Orache is useful for growing in ornamental borders, but it is not so suitable for culinary purposes as the white variety.
It feeds in the autumn on the flowers and seeds of various kinds of goosefoot (Chenopodium), also on Orache (Atriplex).The Moths of the British Isles, Second Series|Richard South