50 Cyclosporiiiae, SargassacccX!, Sargassum. 



duplici serie notata, iiiargine sul)spinescente-(lentata, dentibus al- 

 terne sursuni deorsunique spectaiitibus margineni duplicantibus. 

 Vesiculse in petiolo 8-9 mm. longo sursum incrassato sphoerico-el- 

 lipsoideae, margine angustissimo integerrimo cinctce et apiculo trun- 

 cato terminatjTe. Receptacula glomerulum crassum axillarem, folio 

 triplo breviorem formantia, furcato-ramosissima, teretiuscula sed 

 verrucis prominentibus densissimis spinosa. Substantia plant;e exsic- 

 catie coriacea, madefactai subcarnosa. 



76. Sargassum obovatum Harv. Telf. n. 3. Kuetz. Sp. p. 618, J. Ag. 73 

 Sp. I, p. 346, Sp. Sarg. Austral. p. 89. — Rachidibus ramorum deor- 

 sum ob exsiccationem collabascenti-planis , sursum filiformibus, 

 alterne ramosis, ramis patentibus, foliis densis oblongo-obovatis 

 subpetiolatis seminerviis serratis; vesiculis sparsis, ellipticis vel 

 piriformibus, in petiolo clavato-vesicato elongato, vix apiculatis ; re- 

 ceptaculis angulatis, spinulosis, axillaribus, laxe csespitosis, ramosis- 



-^mis. 



Hah. ad insulam Mauritii (Harvey, Melvill). — Folia inferiora 

 obovata, superiora nunc magis prolongata fere obovato-linearia, 

 costa evanescente et cryptostomatibus admodum prominulis insi- 

 gnia, latiora conspicuo serrato-dentata, angustiora integriuscula. 

 Receptacula longiora laxiusque disposita quam in Sargasso cras- 

 sifolio J. \g. 



77. Sargassum duplicatum J. Ag. Sp. Sarg. Austral. p. 90, Sargassum 77 

 ilicifoliu)r> var. (luplicatum^ J. Ag. Sp. I, p. 318, Sargassum cri- 

 sta^foUum, Harv. in Hook. Lond. Journ. Bot. I, p. 147, Sargassum 

 Pfeiffero' Grun. Alg. Fidsch. p. 5, vix Sargassum. duplicatum 

 Bory Coquille n. 27. — Rachidibus ramorum teretiusculis (exsicca- 

 tione collabascendo adparenter compressis); foliis subspathulato- 

 obovatis at inferiori parte adscendente. superiori subrecurva fere 

 subfalcata, a suprema parte ligulam transversalem a pagina supe- 

 riore emittentibus, margine grosse dentatis, seminerviis, cryptosto- 

 matibus sparsis fere hemisphserice prominulis conspicuis instructis; 

 vesiculis paucis, in petiolo brevi dilatato ipsaruni lougitudinem vix 

 Oijquante, obovato-sph^ericis ; receptaculis ramosissimis glomerulatis- 

 que, spinulosis. 



Hab. in oceano Indico et Pacifico inferiore ad Moluccas et 

 Mascarenas. — Folia ad basim vix excisa. Vesirube magnitudinem 

 seminis Pisi suba^quantes. 



78. Sargassum berberifolium J. Ag. Sp. I, p. 337, Sp. Sarg. Austral. ts 

 p. 90, t. XXYl, V, Kuetz. Sp. p. (118. Sargassxm crista'folium var. 



