Science . 570 SCIENCE [N. a Vol. XXV. No. 636 producing the gametes is the stage arising from the germination ofthe zygote is the sporophyte. All formswhich are hermaphroditic in the gameto-phyte are of necessity hermaphroditic alsoin the sporophyte. Every part of themucor species Sporodinia, therefore (withperhaps exception of the sexual organs),contains both sexes. The same is true ofsome of the mosses and probably of all ofthe homosporous ferns. No representativesof this type exist among the floweringplants. Phycomyces is diceuious in its gameto-phyte. The zygospore formed b
Science . 570 SCIENCE [N. a Vol. XXV. No. 636 producing the gametes is the stage arising from the germination ofthe zygote is the sporophyte. All formswhich are hermaphroditic in the gameto-phyte are of necessity hermaphroditic alsoin the sporophyte. Every part of themucor species Sporodinia, therefore (withperhaps exception of the sexual organs),contains both sexes. The same is true ofsome of the mosses and probably of all ofthe homosporous ferns. No representativesof this type exist among the floweringplants. Phycomyces is diceuious in its gameto-phyte. The zygospore formed by conjuga-tion of branches from male and femaleindividuals produces at germination but asingle kind of germ tube which gives riseto a sporangium containing both male andfemale spores. The sporophyte thereforeis hermaphroditic. That the germ tube infact contains both male and female char-acters may be proven by forcing it to growdirectly out to a vegetative mycelium beforethe formation of spores. The growth
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