. The fern allies of North America north of Mexico. Pteridophyta; Botany. Isoetes Orcutti. The plants referred to Isoctcs Orcutti belong to the same general group of which Isoctcs Nuttallii may be taken as the type. The megaspores, howe\er, are \'er)' smooth, at best having onlv a faint granular appearance. They have the same glassy lustre as those of Isoctcs Nuttallii and are dark blue-grey in colour. The indu- sium is entire. From resemblances of the spores, indusium, and habitat, the author has no doubt that this is a southern form of Isoctcs A^uttallii, and believes it would be better char
. The fern allies of North America north of Mexico. Pteridophyta; Botany. Isoetes Orcutti. The plants referred to Isoctcs Orcutti belong to the same general group of which Isoctcs Nuttallii may be taken as the type. The megaspores, howe\er, are \'er)' smooth, at best having onlv a faint granular appearance. They have the same glassy lustre as those of Isoctcs Nuttallii and are dark blue-grey in colour. The indu- sium is entire. From resemblances of the spores, indusium, and habitat, the author has no doubt that this is a southern form of Isoctcs A^uttallii, and believes it would be better characterised by calling it Isoctcs Nuttallii Orcutti. The leaves of tliis form are few, from two to four inches long, and contain from two to four bast bundles. The megaspores are from ; to 300.'' in di- ameter, and the microspores are dark. Megaspore of Isoetes Orcutti,. 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 Clute, Willard Nelson, b. 1869. New York, F. A. Stokes
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1905
