One of the lobes of its fruit-bearing portion, bearing two rows of spore-cases.
Asa Gray The Elements of Botany for Beginners and for Schools (New York, Cincinnati, Chicago: American Book Co., 1887)
1315×2400, 542.4 KiB
561×1024, 87.0 KiB
350×640, 45.8 KiB
175×320, 16.4 KiB