MARINE AQUARIA 



to somewhat resemble a frond of the "Boston fern." It usually grows to 

 5 to 6 feet with instances of over 20 feet in length, and is of olive-green 

 color. The young plants soon grow to 6 to 8 inches and are of delicate 

 green and yellowish color. Rarely occurs south of Cape Cod, in both 

 shallow and deep water, but sometimes found in the Gulf Stream drift. 



Fucus vesiculosus (Linn.) or Rock Weed, is common on submerged 

 woodwork and rocks and is variable both in the size of the plant and of 

 the fronds; but occurs to two feet in length. It is of leathery texture 

 with flat fronds having numerous small air bladders on each frond and is 

 fastened by disclike holdfasts. The color is olive-green in the younger 

 plants and greenish-brown in the older growth. Occurs generally as far 

 south as the Carolinas. 



Fucus nodosus (Linn.) or Knotted Sea Whistle, derives its name from 

 the "knots" in the fronds produced by the larger air bladders. It is a 

 stringy plant of rich olive-green color. The fronds are generally small and 

 pinnate. Usually found associated with the foregoing. Other common 

 Fuca are F. furcatus. Forked Rock Weed; and the California Rock Weed, 

 F. fastigatus. 



Sargassum vulgare (Ag.) or Gulf Weed, Sea Lentel, occurs principally 

 in the drift of the sea on the coast. It has a disclike holdfast with a cen- 

 tral stem and branching fronds, with the midrib distinct and crisped and 

 toothed edges. The globular air vessels are set between the leaves on 

 short stems. The plant grows below low-tide marks and is common along 

 the Atlantic coast. 



Laminaria saccarhina (Lam.) or Oar Weed, Sugar Sea Belt, has an 

 eight inch long stem and a flat base consisting of rootlike prongs. The 

 stem expands into a wide, dark olive-green, leathery, thick and smooth 

 frond, ruffled at the edges, 4 to 8 feet long and 6 to 12 inches wide. 

 There are also a number of smaller varieties. Found in deep pools and 

 below tide-marks south to Virginia. 



Laminaria flexicaulis (Le Jolis) or Sea Tangle, is somewhat similar to 

 the above, but the frond is broader and divided into long segments ; which 

 together with L. longicruris, are popularly known as Finger Tangles. 

 They usually grow in deeper water than the first named and may reach a 

 length of ten feet. Sometimes found in the Gulf Stream drift. 



Stilophora rhizodes (Ag.) or Needle Weed, is a bristlelike filiform sea- 

 weed with widely spreading irregularly forked branches and cylindrical 

 fronds, with wartlike clusters of sphores which resemble chaplets of beads. 

 It is of olive-green color and occurs below tide-marks from Cape Cod 

 southward. 



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