. A handbook of cryptogamic botany. Cryptogams. VASCULAR CRYPTOGAMS The edges of the pinnules are slightly serrate from the numerous dicho- tomising veins ; the lower part of the stipe is clothed with scales. Spo- ranges with the characteristic oblique annulus of the Hymenophyllaceae have also been found in the coal measures by Carruthers ('Geol. Mag.,' Feb. 1872). Remains which can be referred with certainty to the MARAiTiACEiE are not unfre- quent. In Scolecopteris (Stur) we have a true synange ; the separate sporanges, arranged on a common elevated re- ceptacle, are linear-ovate with a long
. A handbook of cryptogamic botany. Cryptogams. VASCULAR CRYPTOGAMS The edges of the pinnules are slightly serrate from the numerous dicho- tomising veins ; the lower part of the stipe is clothed with scales. Spo- ranges with the characteristic oblique annulus of the Hymenophyllaceae have also been found in the coal measures by Carruthers ('Geol. Mag.,' Feb. 1872). Remains which can be referred with certainty to the MARAiTiACEiE are not unfre- quent. In Scolecopteris (Stur) we have a true synange ; the separate sporanges, arranged on a common elevated re- ceptacle, are linear-ovate with a long free apex, and open by a fissure on the inner side without any trace of an an- nulus. In Asterotheca (Presl) the circular sorus usually con- sists of six exannulate spo- ranges closely adnate to one another, the sori are sessile, and are arranged in a single row on each side of the mid- rib of the pinna. In Renaultia (Stur) a group of cells occurs in the outer wall of the spo- range similar to that in Angi- opteris, which may be the rudiment of an annulus. Seftenbergia (Cord.) presents important differences. The sporanges are not collected into son, but are scattered along the veins of the third order ; each sporange has at its apex a cap-like annulus. It appears to be a connecting link between the IMarattiaceae Other types of Marattiaceae are presented by Danseites. Fig. 94.—Fructifications of fossil Marattiaceae. j4, Se/itnbergia ophidenHatica; B, Haulea Miltoni; C, OUgocarpia LindsiBoides; D, Scolecopteris poly- morpka; E, Asterotheca Stembergii. (After Solms- Laubach.) and Schizseacese. (Gopp.) and Botryopteris (Ren.). The remaining types of ferns of the Devonian and Carboniferous, and especially those of more recent periods, present the greatest resem-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
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