"Bread mold (Rhizopus nigricans). A, older plant; myc, mycelia; sph, sporangiophore; sp, sporangium;…
"Rhizopus nigricans. A, Young sporangium, showing columella within; B, older sporangium, with the wall…
An example of brown mold (mucor mucedo). s, spore; m, mycelium; t, gonidiophore; sp, sporangium.
"Spore-plant of a fern (Aspidium filix-mas). A, part of a rootstock and fronds; fr, young fronds unrollin.…
An illustration of section through a pinnule of the frond and sorus of Aspidium: b, mesophyll; sch,…