. Bulletin, Gulf Biologic Station. Biology -- Societies, etc. 63 Plant secretory cells which yield watery exudates are in general termed hydathodes bj'^ Haberlandt. (d) In the present irstance it is evident that the epidermal cell is the hydathode ana the process merely a conduit, in which the extremity is Figure 3. An epidermal cell showing a process very highly magnified. A hydathode resembling the one found in Spartina stricta has been described by Heberlandt (e). It is found in Gono- erryum, one of the Icacinaceae. A tubular papilla rises from the epidermal cell, as in Spartina, b
. Bulletin, Gulf Biologic Station. Biology -- Societies, etc. 63 Plant secretory cells which yield watery exudates are in general termed hydathodes bj'^ Haberlandt. (d) In the present irstance it is evident that the epidermal cell is the hydathode ana the process merely a conduit, in which the extremity is Figure 3. An epidermal cell showing a process very highly magnified. A hydathode resembling the one found in Spartina stricta has been described by Heberlandt (e). It is found in Gono- erryum, one of the Icacinaceae. A tubular papilla rises from the epidermal cell, as in Spartina, but instead of the end being cicsed by a cellulose wall, it is closed by a mucilaginous cap in the center of which the canal opens. After a heavy rain the cap may be washed away, when the canal is unstopped. Haberlandt says that the function of this hydathode is the same as that of the ordinary water pore in that it serves as a means of escape of water in liquid form, or when water in gaseous form can not escape by the usual process of transpiration. He says that there i. no protoplasmic contents of the canal in the Gonocaryum hyda- thode. If there is any protoplasm in the canal of the Spartina hydathode it is not recognizable by an ordinary oil-immersion lens. The secretion of salty solutions by plants is generally as- sociated with the metabolism of xerophytes, or plants living in (d) (e) Phj'siologische Pflanzenanatomie. loc. 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 Gulf Biologic Station (La. ). Baton Rouge, Louisiana State Board of Agriculture and Immigration.
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