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Dictyotales, Dictyotaceae

Padina sanctae-crucis Børgesen

Padina sanctae-crucis Børgesen photoIn natural habitat.
Photo Data
Place
: Samui Island, Surat Thani.
Depth
: 1.5 m
The plants are flat, flabellate and 2 cells thick throughout, and grow up to 10 cm tall. This species is similar to other species of Padina that are two cells thick, such as P. australis and P. minor however the sori are indusiate in this species. The plants are found on rocks in subtidal zones along shorelines with moderate wave exposure.

Padina sanctae-crucis Børgesen photo2
Fresh specimen.
Padina sanctae-crucis Børgesen photo3
Microscopic view of sorus (arrow 1) covered by indusium (arrow 2).