. Botany of the southern states. In two parts. Botany. If the secondary axes develop tertiary ones, a panicle is formed (Fig. 117), as in the Poa. The term deliquescent panicle is applied to that variety of the panicle, when the rachis is lost in its irregular divisions, and does not continue direct through the inflorescence. The ramification of the axes may proceed further, forming compound panicles. A very dense panicle, with the lower branches shorter than the middle ones, is called a thyrsus, as in the Lilac. Stamens. 117. Immediately within the corolla are situated a row of organs called
. Botany of the southern states. In two parts. Botany. If the secondary axes develop tertiary ones, a panicle is formed (Fig. 117), as in the Poa. The term deliquescent panicle is applied to that variety of the panicle, when the rachis is lost in its irregular divisions, and does not continue direct through the inflorescence. The ramification of the axes may proceed further, forming compound panicles. A very dense panicle, with the lower branches shorter than the middle ones, is called a thyrsus, as in the Lilac. Stamens. 117. Immediately within the corolla are situated a row of organs called stamens. The stamens, like the calyx and corolla, are modifications of leaves. They usually consist of three parts—filament, anther, and pollen. The filament is the thread-like organ which supports the anther. (Fig. 118, b.) This is not necessary to the functions of the sta- Fig. us. mens any more than a petiole is necessary to a leaf. The anther is the knob, usually yellow or brown, situated on the summit of the filament (Fig. 118, a); or if the filament be absent, it sits upon the receptacle. The pollen is the yellow dust-like substance contained within the anther, and is necessary in the vegetable economy to the perfection of the seed. 118. The arrangement of the stamens is usually alternate with the petals or their segments, and of course opposite those ..-CI ...* A panicle ? A deliquescent panicle ? A thyrsus ?—117. Where are the stamens situated? Of how many parts does each consist? What is the filament? What is the anther ? The pollen ?—118. What is the arrange- ment of stamens ?. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darby, John, 1804-1877. [from old catalog]. New York, A. S. Barnes & co. , [etc. ,etc. ]
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1885
