Evolution of sex in plants / by John Merle Coulter.

  • Coulter John Merle, 1851-1928.
Date:
[1914]
Catalogue details

Licence: In copyright

Credit: Evolution of sex in plants / by John Merle Coulter. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    81/160 (page 67)
    (litions. Kxix)sure to air means constant danj;er of excessive loss of moisture, which is fatal to living cells. Algae are not exposed to this danger, and to meet it liverworts needed to develop a structure that \\ ould I'lG. 25.—group of floating liverworts (Rii<hi ' protect them. A comjtact body was the lirst desidera- tum. which would retluce to a minimum the ex])osure of cells to the air. This simply means that only algae with compact bt)dies could have made a start toward actiuiring the land habit. Next, the prostrate position upon a mt)ist surface would mean the minimum exposure