[11] This term is adopted as a translation of the German “anlage.”
[12] Also termed Water-Fungi (Wasserpilzen).
[13] Antheridium is preferred in this sub-class as keeping a more uniform term (Kn).
[14] In the resupinate fruit-bodies a fertile and sterile surface cannot be distinguished (cf. Polyporaceæ and some Stereum-species).
[15] The two last genera are identical, the Algal part being a Scytonema, that of Cora a Chroococcus; while the same Fungus—a Thelephora—takes part in the formation of all three (A. Möller, Flora, 1893).
[16] Formerly termed oophyte.
[17] The oospore divides by a wall transverse or oblique to the longer axis of the archegonium. From the upper (epibasal) cell, the capsule (and seta) is derived, while the lower (hypobasal) gives rise to the foot. In Riccia the hypobasal half takes part in the formation of the sporangium.
[18] In the Polypodiaceæ unisexual prothallia as distinct as those of Equisetum are of common occurrence.
[19] The position of the annulus varies in the different orders; longitudinal in Polypodiaceæ, Hymenophyllaceæ, and Cyatheaceæ; transverse in Schizæaceæ, Gleicheniaceæ; indistinct or apical in Osmundaceæ, Ophioglossaceæ, Marattiaceæ, Salviniaceæ, Marsiliaceæ.
[20] The former genus Pteris is divided into Pteris and Pteridium.