Students' handbook to accompany Plants and their uses . FIG. 54. Entire plant of dog-tooth violet (Erythroiihitn) Hardly any aerial stem ap-pears, the flower stalk bringsheathed by the leafstalksand arising from a deeplyburied bulb. One fourthnatural size. FIG. 55. Rosette of leaves of the common evening primrose, as seen at the end of the first years growth of the plant on the green cells of the leaf. Clearly, therefore, it is usuallyas important for sugar- and starch-making that the leaf shouldcatch all the sunlight it can get, as it is for rapid sailing thata sailboat should expose its sail
Students' handbook to accompany Plants and their uses . FIG. 54. Entire plant of dog-tooth violet (Erythroiihitn) Hardly any aerial stem ap-pears, the flower stalk bringsheathed by the leafstalksand arising from a deeplyburied bulb. One fourthnatural size. FIG. 55. Rosette of leaves of the common evening primrose, as seen at the end of the first years growth of the plant on the green cells of the leaf. Clearly, therefore, it is usuallyas important for sugar- and starch-making that the leaf shouldcatch all the sunlight it can get, as it is for rapid sailing thata sailboat should expose its sails as fairly as possible to The student will find it well worth while to observethe arrangement of alternate leaves, which are so placed, both 1 Leaves just unfolding from the bud. some of those exposed to tropicalsuns, and certain others (sect. 51) are exceptions. THE STEM AND THE LEAF 73 on vertical and on horizontal branches, that they lie flatwaysto the sun and do not overshadow each other. The way inwhich these results are secured in the case of opposite leavesis well shown in figures 39, 52, and 53. 71. Rosette plants. Some plants, such as the dandelion andthe plantains, have their leaves spread out in the form of a
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Keywords: ., bookcentury1900, bookcollection, bookdecade191, booksubjectbotany
