. Heredity and evolution in plants . FIG. 96.—Cycas circinalis. Tip of trunk, showing numerous leaf-stalks, and the large terminal cone. Photo from specimen in BrooklynBotanic Garden. (Cf. Fig. 95.) were called Cycadeoidea by the eelebrated geologist Buck-land. The original nanir of the order was derived from THE EVOLUTION OF PLANTS 213. FIG. 97.—Cycadeoidea Wielandi. At left, a finely preserved trunkbearing many ovulate cones with seeds approaching maturity, and a lessernumber of either young or abortive cones. /, Receptacle of a shed ornon-preserved cone with surrounding bracts yet present;
. Heredity and evolution in plants . FIG. 96.—Cycas circinalis. Tip of trunk, showing numerous leaf-stalks, and the large terminal cone. Photo from specimen in BrooklynBotanic Garden. (Cf. Fig. 95.) were called Cycadeoidea by the eelebrated geologist Buck-land. The original nanir of the order was derived from THE EVOLUTION OF PLANTS 213. FIG. 97.—Cycadeoidea Wielandi. At left, a finely preserved trunkbearing many ovulate cones with seeds approaching maturity, and a lessernumber of either young or abortive cones. /, Receptacle of a shed ornon-preserved cone with surrounding bracts yet present; /, two conesbroken away during erosion, with a portion of the basal infertile pedicelyet remaining; m, four cones eroded down to the surface of the armor,in this instance about or a little beneath the level of the lowermost seeds;y, three of the dozen or more very young cones, in some cases knownto be simply ovulate and to be regarded as having aborted or else as be-longing to a later and sparser series of fructifications than the seed-bearingcones present, the latter unquestionably representing the culminant fruit-producing period in the life of this cycad; 5 (over lower arrow), the ovulatestrobilus, shown at the right, in its natural position, this photograph havingbeen made before the cone was cut out by a cylindrical drill.
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Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidheredityevol, bookyear1920
