. Practical botany. Botany. 272 PKACTIGAL BOTAJSTY the leafy liverworts from some of the mosses except when the sporophytes are present. In one group of liverworts, of which the horned liverwort (^Anthocerog) is the commonest represent- ative, the gametophyte is strikingly simple and the sporophyte equally striking in its complexity (Fig. 227). This plant is widely distributed upon damp rocks, banks of streams, and often in open meadows. The gametophyte is small and extremely thin. The simple antheridia and archegonia are embedded in the gametophyte. After the oospore is formed, it germi- nate
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. Practical botany. Botany. 272 PKACTIGAL BOTAJSTY the leafy liverworts from some of the mosses except when the sporophytes are present. In one group of liverworts, of which the horned liverwort (^Anthocerog) is the commonest represent- ative, the gametophyte is strikingly simple and the sporophyte equally striking in its complexity (Fig. 227). This plant is widely distributed upon damp rocks, banks of streams, and often in open meadows. The gametophyte is small and extremely thin. The simple antheridia and archegonia are embedded in the gametophyte. After the oospore is formed, it germi- nates and produces a sporo- phyte, which consists of a large swollen foot reerion and prominent stalk. The foot is well fitted to absorb nourish- ment from the gametophyte and the stalk bears chlorophyll. The presence of stomata in the stalk further suggests ability to do chlorophyll work. In- deed, if the sporophyte could live with its foot in the soil, it might live independent of the gametophyte. The entire stalk becomes a kind of cap- sule, part of its tissues forming spores, first at its tip, then L )wer aiid lower down to the base. It is the sujjposed resemblance of the sporophyte to a horn which gave the name horned liverworts to the Anthoccros forms. 254. Summary of the bryophytes. Th(^ bryophytes are in many ivspects higher plants than the thallophytes. Sexual reproduction by means of complex archegonia and anther- idia occurs upon one phase of these plants, and asexual reproduction by means of special capsules occurs upon a dis- tinctly different part of the plant's life cycle. This constitutes. Fig. 227. Anthoceros, a liverwort with very simple thallus and com- plex sporophyte. 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 work.. Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- jo