Easton's Bible Dictionary
(Heb. pishtah, i.e., “peeled”, in allusion to the fact that the stalks of flax when dried were first split or peeled before being steeped in water for the purpose of destroying the pulp). This plant was cultivated from earliest times. The flax of Egypt was destroyed by the plague of hail when it “was bolled”, i.e., was forming pods for seed (Ex. 9:31). It was extensively cultivated both in Egypt and Palestine. Reference is made in Josh. 2:6 to the custom of drying flax-stalks by exposing them to the sun on the flat roofs of houses. It was much used in forming articles of clothing such as girdles, also cords and bands (Lev. 13:48, 52, 59; Deut. 22:11). (See LINEN.)
International Standard Bible Encyclopedia (ISBE)
<p>flaks pesheth, also pishtah; linon (Mt 12:20)): The above Hebrew words are applied</p><p>(1) to the plant: "The flax was in bloom" (the King James Version "bolled"; Ex 9:31);</p><p>(2) the "stalks of flax," literally, "flax of the tree," put on the roof to dry (Jos 2:6);</p><p>(3) to the fine fibers used for lighting: the King James Version "tow," "flax," the Revised Version (British and American). "A dimly burning wick will he not quench" (Isa 42:3); "They are quenched as a wick" (Isa 43:17). The thought is perhaps of a scarcely lighted wick just kindled with difficulty from a spark.</p><p>(4) In Isa 19:9 mention is made of "combed flax," i.e. flax hackled ready for spinning (compare Ho 2:5,9; Pr 31:13). The reference in Jud 15:14 is to flax twisted into cords.</p><p>(5) In Jud 16:9; Isa 1:31, mention is made of ne`oreth, "tow," literally, something "shaken off"--as the root implies--from flax.</p><p>(6) The plural form pishtim is used in many passages for linen, or linen garments, e.g. Le 13:47,48,52,59; De 22:11; Jer 13:1 ("linen girdle"); Eze 44:17 f. Linen was in the earliest historic times a favorite material for clothes. The Jewish priestly garments were of pure linen. Egyptian mummies were swathed in linen. Several other Hebrew words were used for linen garments.</p><p>See LINEN.</p><p>Flax is the product of Linum usitatissimum, a herbaceous plant which has been cultivated from the dawn of history. It is perennial and grows to a height of 2 to 3 ft.; it has blue flowers and very fibrous stalks. The tough fibers of the latter, after the decay and removal of the softer woody and gummy material, make up the crude "flax." Linseed, linseed oil and oilcake are useful products of the same plant.</p><p>E. W. G. Masterman</p>