. The school book of forestry . redwith leaves. Maple seeds fly by means of double-winged sails which carry them far afield beforethey settle. Ash seeds have peculiar appendageswhich act like a skate-sail in transporting themto distant sections. Cottonwood seeds havedowny wings which aid their flight, while bass-wood seeds are distributed over the country bymeans of parachute-like wings. The pods of thelocust tree fall on the frozen ground or snowcrust and are blown long distances from theirsource. On the other hand, oak, hickory, andchestnut trees produce heavy seeds which gener-ally remain w
. The school book of forestry . redwith leaves. Maple seeds fly by means of double-winged sails which carry them far afield beforethey settle. Ash seeds have peculiar appendageswhich act like a skate-sail in transporting themto distant sections. Cottonwood seeds havedowny wings which aid their flight, while bass-wood seeds are distributed over the country bymeans of parachute-like wings. The pods of thelocust tree fall on the frozen ground or snowcrust and are blown long distances from theirsource. On the other hand, oak, hickory, andchestnut trees produce heavy seeds which gener-ally remain where they fall. Squirrels are the most industrious forestersin the animal world. Each year they bury greatquantities of tree seeds in hoards or caches hiddenaway in hollow logs or in the moss and leaves ofthe forest floor. Birds also scatter tree seedhere, there, and everywhere over the forests andthe surrounding country. Running streams andrivers carry seeds uninjured for many milesand finally deposit them in places where they. HOW TREES GROW AND MULTIPLY 17 sprout and grow into trees. Many seeds arecarried by the ocean currents to distant foreignshores. The decay of leaves and woodland vegetationforms rich and fertile soils in the forests, in whichconditions are favorable for the development ofnew tree growth. When living tree seeds areexposed to proper amounts of moisture, warmthand air in a fertile soil, they will sprout and root develops which pushes its way down intothe soil, while the leaf-bud of the plant, whichsprings from the other end of the seed, works itsway upward toward the light and air. Thisleafy part of the seed finally forms the stem ofthe tree. But trees may produce plenty of seedand yet fail to maintain their proper proportionin the forest. This results because much of theseed is unsound. Even where a satisfactory sup-ply of sound fertile seed is produced, it does notfollow that the trees of that variety will be main-tained in the forest, as the seed
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforests, bookyear1922
