. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. 98a. The primary divisions in a palmately decompound leaf (asa b) are not given a distinct name in general botanical botanist would describe this dieentra leaf (Fig. 87) nearly as fol-lows : Leaf ternately decompound (or sometimes written ternatelycompound, if the degree of compounding is afterwards specified), themain sections bearing palmately — or even pinnately — divided leaflets,the segments again deeply cut or divided. 99. The leaf in Fig. 88 (agum arable tree, a kind of
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. 98a. The primary divisions in a palmately decompound leaf (asa b) are not given a distinct name in general botanical botanist would describe this dieentra leaf (Fig. 87) nearly as fol-lows : Leaf ternately decompound (or sometimes written ternatelycompound, if the degree of compounding is afterwards specified), themain sections bearing palmately — or even pinnately — divided leaflets,the segments again deeply cut or divided. 99. The leaf in Fig. 88 (agum arable tree, a kind of aca-cia) is decompound, and is pin-nate. Each of the numerousentire pieces or parts is calleda leaflet, and the six primaryparts are pinnas. The leaf ispinnately bi-compound (or twice-compound) . If each of theleaflets was again compound—which is not very rare inplants of this family—the leafwould be said to be tri-com-pound; the primary parts would stUl be calledpinnae, the secondary parts pinnules, and the lastcomplete divisions leaflets. 100. This acacia leaf has no terminal Twice-pinnate leaf ofacacia. 92 zESSoys with plants Compare the poison sumac (Fig. 85). Thatis, one is abruptly-pinnate, like the honey locustand the peanut (having no terminal leaflet),and the other is odd-pinnate. The latter is themore common form. Leaves are fairly constant
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Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
