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Environmental effect on leaves of Diplanthera Du Petit-Thouars
Phillips, R.C. (1960). Environmental effect on leaves of Diplanthera Du Petit-Thouars. Bull. Mar. Sci. Gulf Caribb. 10(3): 346-353
In: Bulletin of Marine Science of the Gulf and Caribbean. University of Miami Press: Coral Gables. ISSN 0096-8900
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| Trefwoorden |
Diplanthera Thouars [WoRMS]
Marien/Kust |
| Abstract |
Diplanthera was collected from three tidal zones from various Florida locations. Three growth conditions were found which corresponded to these tidal zones. The first, found in areas exposed at both neap and spring low tides, consisted of dwarf-sized plants. The second, found in areas exposed only at spring low tides, were intermediate in size between the first and third classifications. The third condition, found in areas never exposed, displayed plants of luxuriant size. Leaf length, leaf width, rhizome thickness, and rhizome internode length were found to be affected by the environment. The two vegetative characters of leaf apex and internal cellular anatomy were considered by Sauvageau (1890) and later substantiated by Feldmann (1938) as valid for the separation of the two species of Diplanthera, D. uninervis and D. wrightii. The author found that these factors were variable in D. wrightii, according to the tidal zone in which the plants were found. It is concluded that these two characters are not valid for distinguishing the two species. |
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