. Introduction to structural and systematic botany, and vegetable physiology. Botany. EXOGENOUS OB DICOTYLKDONOUS PLANTS. 481 927. Ord. CycadaceiE {Oycas Family). Tropical plants, with an unbranclied cylindrical trunk, increasing, like Palms, by a single terminal bud; the leaves pinnate and their segments more or less rolled up from the apex (circinate) in vernation, in the manner of Ferns. Flowers dioscious ; the staminate in a strobile or cone ; the pistillate also in strobiles, or else (in Cycas) occupying contracted. and partly metamorphosed leaves; the naked ovules borne on its margins. —
. Introduction to structural and systematic botany, and vegetable physiology. Botany. EXOGENOUS OB DICOTYLKDONOUS PLANTS. 481 927. Ord. CycadaceiE {Oycas Family). Tropical plants, with an unbranclied cylindrical trunk, increasing, like Palms, by a single terminal bud; the leaves pinnate and their segments more or less rolled up from the apex (circinate) in vernation, in the manner of Ferns. Flowers dioscious ; the staminate in a strobile or cone ; the pistillate also in strobiles, or else (in Cycas) occupying contracted. and partly metamorphosed leaves; the naked ovules borne on its margins. — Ex. Cycas, Zamia. — A kind of Arrowroot is obtained from these thickened stems, or caudexes, as from our dwarf Florida species (tlie Coontie of the aborigines); and a coarse Sago from the trunk of Cycas. FIG. 1189. Zamia iategrlfolia (the Coontie of Florida). 1190. Section of the sterile ament. 1191. One of its scales detached, bearing scattered anthers. 1192. Fertile ament, from which a quarter-section is removed. 1193. A pistillate flower, consisting of two ovules pendent from the thickened summit of the carpellary scale. 1194. A drupaceous seed, from which a part of the pulpy outer portion, at the apex, is removed. 1195. Vertical section through the seed (of the natural size], showing the pulpy outer coat, the hard inner integument, the albumen, and the embryo. 41. 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 Gray, Asa, 1810-1888. New York [etc. ] Ivison, Blakeman, Taylor & Co.
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1850, booksubjectbotany
