Sargassum

Sargassum crassifolium J. Agardh

(G) Sargassum cristaefolium C. Agardh

Sargassum ilicifolium (Turner) J. Agardh

Sargassum microphyllum C. Agardh

(G) Sargassum obtusifolium J. Agardh

Tsuda (1988) placed all specimens (GUAM-ML) identified in Tsuda (1972) as Sargassum tenerrimum J. Agardh into S. obtusifolium.

(G) Sargassum polycystum C. Agardh

Tsuda (2002) in his checklist for Palau also listed:
Sargassum oligocystum Montagne

S. cristaefolium habit.

S. tenerrimum (L; fertile) and S. polycystum.(Inarajan at back side of rim pools, Apr. 7 2003)

macro
Detail of S. tenerrimum with receptacles, and S. polycystum with abundant small floats.

macro
Detail of S. polycystum floats. (The brown dots are cryptostomata, or hair pits.)

S. cristaefolium (fertile)

macro
Detail of S. cristaefolium receptacles.

20x DIC
Portion of section of receptacle, showing three parenchymatous tissues: epidermis (E),
cortex (C) (these both pigmented), and medulla (M).

20X DIC
Portions of two conceptacles with eggs (large, round, colorless cells).