Some American authors advise the use of pollen gathered as needed. In practice this is not easily possible, as the pollen is scattered about as soon as the anthers burst. A more certain plan is to stick a number of small branches loaded with newly opened flowers in moist sand in a warm room. As the anthers become about mature they are clipped off and dropped on white paper. In a dry room the ripening process will soon be completed and the liberated pollen dried. With this dry pollen thus roughly gathered, mixed with the dried anthers and pistils, the most perfect success has been often secured. Even with pollen thus gathered and sent in a letter from Oregon, the success in using has been satisfactory.