. Contributions from the Hull Botanical Laboratory. Plants. iooS] BRIEFER ARTICLES 413 OO O CD c: hundred ovules germinated in 1906, the embryos bore only one cotyledon (figs. 1,2,3). When the anatomical study was completed, a preliminary note was received from Matte (4), who had germinated some seeds provided by Chamberlain and had begun the study, not knowing that the work was being carried on in this laboratory. Matte reports that the embryo is monocotyledonous. Chamberlain (14) in his recent report on Cera- tozamia, read before the Chicago meeting of the Botanical Society of America, makes
. Contributions from the Hull Botanical Laboratory. Plants. iooS] BRIEFER ARTICLES 413 OO O CD c: hundred ovules germinated in 1906, the embryos bore only one cotyledon (figs. 1,2,3). When the anatomical study was completed, a preliminary note was received from Matte (4), who had germinated some seeds provided by Chamberlain and had begun the study, not knowing that the work was being carried on in this laboratory. Matte reports that the embryo is monocotyledonous. Chamberlain (14) in his recent report on Cera- tozamia, read before the Chicago meeting of the Botanical Society of America, makes the same Yig. 1.—Seedling of Ceratozamia showing base of the cotyledonary petiole encir- cling the stem. Natural size. Fig. 2.—Cross-section of middle region of cotyledon. XS. Fig. 3.—Longitudinal section of seedling in the emergent stage: c, cotyledon; s, scale; a, growing point of stem. X8. In other cycad embryos, the cotyledons are often reported as unequal in size. Tretjb (5) observed and figured the inequality in Cycas circi- nalis. Worsdell (6) described a seedling of Cycas revoluta in which one cotyledon was considerably shorter than the other. Matte (7) re- ports a case in Dioon edule in which the vascular strands in the smaller cotyledon are reduced in number, only the rudiments of the missing ones occurring at the base of the cotyledon. He also mentions an inequality in. 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 Hull Botanical Laboratory. [Chicago : University of Chicago Press
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1895
