The evening primrose (Oenothera biennis L.) is found wild in the Poles’e and other regions of the U.S.S.R. The air-dry roots contained 1.6% rubber and 32% resin. The leaves contained 0.3% rubber and 2.5% resin. The yields of bast from the stems were 13.3-19.5% and of fiber from bast 39.4 - 57.0%. The seeds yielded 9.1% of an oil similar to poppy oil; it did not become rancid during 1 year. Drying oil from evening primrose gives rapidly drying paints. Unfertilized soil produced: roots 23 quintals, stalks 132 quintals, and seeds 18 quintals, per hectar. Soil fertilized with P2O5, N and K20 produced 32, 189 and 20, resp., quintals per hectar. The plant grows well on sandy soils under conditions favorable for cultivation of beets.
W. R. Henn