Illustration from 1911 Encyclopædia Britannica, article BRYOPHYTA.

Original caption: FIG. 5.—Marchantia polymorpha. (After Sachs.)

A. Portion of thallus (t) bearing two stalked antheridiophores (hu).

B. Longitudinal section through a young antheridiophore. The antheridia (a) are seated in depressions of the upper surface (o); b, scales; h, rhizoids.

C. Longitudinal section of antheridium; st, stalk; w, wall.

D. Two spermatozoids.

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