. Nature-study; a manual for teachers and students. Nature study. LESSONS WITH PLANTS 333 the structure of in a general perhaps the best for teaching 3 recognize but understand ^ay. The common sunflower is he structure of com- iosites. A few belated pecimens may still be Dund in the fall when chool begins. But the ingle garden zinnias, nd single asters, the did sunflowers, and the aisies will do very well. d first thought one 'â ould think that what ; generally called a sun flower" is really a sin- le flower, but closer ex- mination will reveal le fact that this is an ggregation of hundre
. Nature-study; a manual for teachers and students. Nature study. LESSONS WITH PLANTS 333 the structure of in a general perhaps the best for teaching 3 recognize but understand ^ay. The common sunflower is he structure of com- iosites. A few belated pecimens may still be Dund in the fall when chool begins. But the ingle garden zinnias, nd single asters, the did sunflowers, and the aisies will do very well. d first thought one 'â ould think that what ; generally called a sun flower" is really a sin- le flower, but closer ex- mination will reveal le fact that this is an ggregation of hundreds f very small flowers lassed together in a at head. Note first the reen calyx-hke leafy :ales on the outside of le whole. This is not a true calyx, but is called an in- olucre. Note how the scales are in several overlapping 3WS. Next within the green involucre comes a circle of at, ribbon or strap-shaped, colored parts that are often Tongly called petals. They are not petals, but whole flow- rs. Pull out some of these flowers. Note that the flat. Fig. 132. Pussy-willows- (The pussies are flower buds.). 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 Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons
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