The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . ounded on them. When there is no articulation between the petiole andthe stem, as is the case with many Monocotyledons, theleaf is continuous with the axis, and is not deciduous, butwithers on the stalk. In many Liliaceous plants theleaves during their decay continue attached to the petiole varies in length, being usually shorter than thelamina, but sometimes much longer. In some Palms it is15 or 20 feet long, and is so firm as to be used for poles orwalking-sticks. In general, the petiole is mo
The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . ounded on them. When there is no articulation between the petiole andthe stem, as is the case with many Monocotyledons, theleaf is continuous with the axis, and is not deciduous, butwithers on the stalk. In many Liliaceous plants theleaves during their decay continue attached to the petiole varies in length, being usually shorter than thelamina, but sometimes much longer. In some Palms it is15 or 20 feet long, and is so firm as to be used for poles orwalking-sticks. In general, the petiole is more or lessrounded in its form, the upper surface being flattened orgrooved. Sometimes it is compressed laterally, as in theAspen, and to this peculiarity the trembling of the leavesof this tree is attributed. In aquatic plants the leaf-stalkis sometimes distended with air, as in Pontederia and 4—7 Trapa, so aa fo float the leaf. At other times it is viinged,and is either leafy, as in the Orange (fig. 119, p). Lemon, andDionjea (fig. 46, p), or jjitcher-like, aa in the Pitcher-plant.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
