. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Fig. 228. Flowers of commonbuttercup. Suggestions.—The pupil should nowlook for the nectaries in all flowerswhich he suspects to be insect-polli-nated. The presence of spurs andsacs, and also of glands, is presumptive evidence of presence of insects about flowers always raises the presump-tion that those flowers are entomophilous ; the pupil should, there-fore, determine what visitors the common flowers may have. CROSS-FEKTILIZATION, CONCLUDED 239 XLV. CROSS-FERTILIZATION, CONCL
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Fig. 228. Flowers of commonbuttercup. Suggestions.—The pupil should nowlook for the nectaries in all flowerswhich he suspects to be insect-polli-nated. The presence of spurs andsacs, and also of glands, is presumptive evidence of presence of insects about flowers always raises the presump-tion that those flowers are entomophilous ; the pupil should, there-fore, determine what visitors the common flowers may have. CROSS-FEKTILIZATION, CONCLUDED 239 XLV. CROSS-FERTILIZATION, CONCLUDED 277. If the flower is to be pollinated by thevisit of insects, there must be some special con-trivances or adaptations in the flower by which thatend is accomplished. Fig, 229 shows two flowers,.
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Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
