A young prothallus of a Maiden-hair, middle portion of the younger one, partly among the rootlets, the antheridia or fertilizing organs, and above, near the notch, three pistillidia to be fertilized.
Asa Gray The Elements of Botany for Beginners and for Schools (New York, Cincinnati, Chicago: American Book Co., 1887)
1142×2400, 552.9 KiB
487×1024, 86.8 KiB
304×640, 47.4 KiB
152×320, 18.4 KiB