. Gray's school and field book of botany. Consisting of "Lessons in botany," and "Field, forest, and garden botany," bound in one volume. Botany; Botany. 58 LEAVES. [SECTION 7. feather-veined (i. e. pinnaiely-veined) simple leaf; as will be seen at once on comparing the forms. The lea/lets of the former answer to the loies or divisions of the latter; and the continuation of the petiole, along which the leaflets are arranged, answers to the midrib of the simple leaf. 150. Three sorts of pinnate leaves are here given. Yig. 156 is pinnate with an odd or end leaflet, as in the
. Gray's school and field book of botany. Consisting of "Lessons in botany," and "Field, forest, and garden botany," bound in one volume. Botany; Botany. 58 LEAVES. [SECTION 7. feather-veined (i. e. pinnaiely-veined) simple leaf; as will be seen at once on comparing the forms. The lea/lets of the former answer to the loies or divisions of the latter; and the continuation of the petiole, along which the leaflets are arranged, answers to the midrib of the simple leaf. 150. Three sorts of pinnate leaves are here given. Yig. 156 is pinnate with an odd or end leaflet, as in the Common Locust and the Ash. Pig. 157 is pinnate with a tendril at the end, in place of the odd leaflet, as in die Vetches and the Pea. Tig. 158 is evenly or abrupty/ pinnate, as in the Honey-Locust. 151. Palmate (also named Digitate) leaves are those in which the leaf- lets are all borne on the tip of the leaf- stalk, as in the Lupine, the Common Clover, the Virginia Creeper (Pig. 93), and the Horse-chestnut and Buckeye (Fig. 159). They evidently answer to the radiate-veined or palmately-veined simple leaf. That is, the Clover-leaf of three leaflets is tiie same as a palmately three-ribbed leaf cut into three separate leaflets. And such a simple five-lobed leaf as that of the Sugar-Maple, if more cut, so as to separate the parts, would produce a palmate leaf of five leaflets, like that of the Horse-chestnut or Buckeye. , 152. Either sort of compound leaf may have any number of leaflets ; yet palmate leaves cannot well have a great many, since tliey are all crowded together on the end of the main leaf-stalk. Some Lupines have nine or eleven; the Horse-chestnut has seven, the Sweet Buckeye more commonly five, the Clover three. A pinnate leaf often has only seven or five leaflets, or only three, as in Beans of the genus Phaseolus, etc.; iu some rarer cases only t'"o; in the Orange and Lemon and also in the common Barberry there is only one! The joint at the place where the lea
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
