The embryology and development of Riccia lutescens and Riccia crystallina .. . ed on themud and growth should continue rosettes would be formed. Fig. 6. Plants decolorized in alcohol. The sporophytes appear as chains ofdark bodies in the thallus. PLATE VI. Fig. 7. Longitudinal section of thallus parallel to the dorsal furrow, showingarrangement of sexual organs. Fig. 8. Cross-section of thallus showing archegonia. Fig. 9. Cross-section of thallus, showing the origin of archegonia in rows onfloor of dorsal groove. Fig. 10. Cross-section of thallus, antheridia. Fig. 11. Longitudinal section of t
The embryology and development of Riccia lutescens and Riccia crystallina .. . ed on themud and growth should continue rosettes would be formed. Fig. 6. Plants decolorized in alcohol. The sporophytes appear as chains ofdark bodies in the thallus. PLATE VI. Fig. 7. Longitudinal section of thallus parallel to the dorsal furrow, showingarrangement of sexual organs. Fig. 8. Cross-section of thallus showing archegonia. Fig. 9. Cross-section of thallus, showing the origin of archegonia in rows onfloor of dorsal groove. Fig. 10. Cross-section of thallus, antheridia. Fig. 11. Longitudinal section of thallus parallel to surface, showing thearrangement of antheridia. Archegonia have not begun to develop. Figs. 12-18. Stages in development of archegonium. Fig. 19. Archegonium in which egg-cell has not been fertilized and isshrunken. Fig. 20. Cross-section of neck of archegonium. Fig. 21-25. Stages in development of sporophyte. Fig. 26. Spore mother-cells. Figs. 27-33. Development of antheridium. Figs. 27-31, from materialcollected in October. B0TAX1CAL GAXETTE, XLI PLATE V. LEWIS on RICCIA BOTAXICAL GAZETTE, XLI PLATE VJembryologydevelo00lewi
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