. Lessons in botany. Botany. SEED DISTRIBUTION. 295 the seeds are provided with '' floats," " parachutes,'' or winged devices which buoy them up as they are whirled along, often , . miles away. In Hjl/Ly ' late spring or early summer the pods of the willow burst open, exposing the seeds, each with a tuft of white hairs making a mass of soft down. As the delicate hairs dry, they straighten out in a loose spread- ing tuft, which frees the individual seeds from the compact mass. Here they are caught by cur- rents of air and float off singly or in small clouds. 461. Theprickly lettuce. —
. Lessons in botany. Botany. SEED DISTRIBUTION. 295 the seeds are provided with '' floats," " parachutes,'' or winged devices which buoy them up as they are whirled along, often , . miles away. In Hjl/Ly ' late spring or early summer the pods of the willow burst open, exposing the seeds, each with a tuft of white hairs making a mass of soft down. As the delicate hairs dry, they straighten out in a loose spread- ing tuft, which frees the individual seeds from the compact mass. Here they are caught by cur- rents of air and float off singly or in small clouds. 461. Theprickly lettuce. — In late summer or early autumn the seeds of the prickly let- tuce (Lactuca sca- riola) are caught up from the road- sides by the winds, and carried to ¥ fFig-249-. fields where they Lactuca scanola. J are unbidden as well as unwelcome guests. This plant is shown in fig. 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 Atkinson, George Francis, 1854-1918. New York, H. Holt and company
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