The White Pine (Pinus strobus Linnaeus) . Leaves and Bud of the White Pine. Bull*Un No. JJ, Oiv. o( FoinUj. U. S. ol Plate Cones. Seeds, of the White Pine. SEEDS AND SEED 23 Mich.) between the middle and tlie end of the month. The staminate flowers are borne laterallyon the shoots of the season (Il. VI, J). They are extremely sinii)lo, in structure, (consisting ofnumerous pollen sacs borne in |)airs on the outer face of the scale-like staminal leaves. Thepollen is produtted in jjreat abundance and is carried by the wind to great distances. Fertilization,how
The White Pine (Pinus strobus Linnaeus) . Leaves and Bud of the White Pine. Bull*Un No. JJ, Oiv. o( FoinUj. U. S. ol Plate Cones. Seeds, of the White Pine. SEEDS AND SEED 23 Mich.) between the middle and tlie end of the month. The staminate flowers are borne laterallyon the shoots of the season (Il. VI, J). They are extremely sinii)lo, in structure, (consisting ofnumerous pollen sacs borne in |)airs on the outer face of the scale-like staminal leaves. Thepollen is produtted in jjreat abundance and is carried by the wind to great distances. Fertilization,however, notwithstanding the ])rofuse production of pollen, often fails to take place. In ,failure api)ears to be rather the rule than the exception, if we consider the frequency of offyears, in which little, if any, good seed is jnoduced. But doubtless other causes often coinbineto i)revent the produtition of a full crop of seeds. The i)istillate flowers occupy the apex of the young shoot (IM. VI, 2), Anally forming a bunch ofcones i)endent from the ends of the branches. At the time of pollination they are about onefourth of an inch in
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Keywords: ., book, bookcentury1800, bookdecade1890, bookpublisherwashingtongpo
