. The botanical class-book, and flora of Pennsylvania, designed for seminaries of learning and private classes. r.) 3. Acerose, (needle-shaped) as in the Pines. 105. When the veins diverge from the middle, the leafbecomes Lanceolate as in the Orchis. Oblong as in the Cypri-pedium. Curvincrved Leaves. 106. When the simple parallel veins or nerves arise froma prolongation of the petiole in the form of a thickened mid-rib, they are called curvinerved, as in the Pontederia an iEthiopian Lily (Calla). COMPOUND LEAVES. 107. A compound leaf consists of several loaves or leafletsattached to the common
. The botanical class-book, and flora of Pennsylvania, designed for seminaries of learning and private classes. r.) 3. Acerose, (needle-shaped) as in the Pines. 105. When the veins diverge from the middle, the leafbecomes Lanceolate as in the Orchis. Oblong as in the Cypri-pedium. Curvincrved Leaves. 106. When the simple parallel veins or nerves arise froma prolongation of the petiole in the form of a thickened mid-rib, they are called curvinerved, as in the Pontederia an iEthiopian Lily (Calla). COMPOUND LEAVES. 107. A compound leaf consists of several loaves or leafletsattached to the common petiole by articulation, distinct fromeach ether and falling away separately. Feather-veined Corn-pound leaves. 108. When a feather-veined leaf becomes comDound. a D 38 FORM OF LEATES. pinnate (winged) leaf (Fig. 48) is produced. The petiolebearing a row of leaflets on each side; generally equal inn,uinber and opposite. 1. Unequally pinnate, (Fig. 48) when a pinnate leaf isterminated by an odd leaflet. Ex. Hose, Ash, it is terminated by a tendril it is called cirrhose as inthe Pea. 48. 49.
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
