Pi.cell.aph. 2. THALASSIOPHYT. 45. Ulva. 343 
2. Ulva lalissima. Broadest laver. 
Thallus yellow-green, solitary, oblong, very broad, flat, 
edge waved. 
Ulva latissima, Lin. S. P. 1632. 
Sea-shores. 
Thallus 2 or 3 feet long, nearly a foot broad, edge waved, 
base not narrower. 
3. Ulva‘ bullosa. Bullate laver. 
Thallus dark green, dilated, at first tubular, then flat- 
tened, sinuous, rather plaited, slippery. 
Ulva palustris lactuce marine similis, sed multo minor et tenerior, 
Dillen in Raii Syn. 63, 6. 
Tremella palustris, vulgari similis, sed minor et tenerior, Dillen Musc.. 
AA, 
Ulla bullosa, Roth Cat. 3, 329. 
Ulva Lactuca 8, Hudson Fl. Angl. 567. 
On aquatic plants in ditches; annual; Sept. to May. 
- Thallus solitary or aggregate. 
4. Ulva lanceolata. Lance laver.. 
Thallus pale green, ovate, spearshape. 
Ulva lanceolata, Lin. §. P. 
Rocks on the sea-shore. 
Thallus 9 inches to a foot long. 
5. Ulva fasciata. Banded laver. 
Thallus green, aggregate, lanceolate, not cut, narrower 
at both ends, flat; edge flexuous. 
Ulva Linza, Lin. S. P. 1633. 
Tremella marina fasciata, Dillen in Raii Syn. 62,33 Musc. 46. 
Thallus 6 to 12 inches long, an inch broad. 
6. Ulva plicata. Folded laver.. 
Thallus dark green, connate at bottom, imbricate, plaited, 
ovate, blunt. 
Lichen marinus, Tabernem. Icon. 814. 
Bryon lactucwfolium, Lobel, 2, 247. 
Ulva plicata, Flor. Dan. 829. - 
Rocks and the sea-shore. 
Thalli many, aggregate, umbilicated at bottom, in the 
centre. 
7. Ulva terrestris, Land laver.. 
Thallus dark green, aggregate, ovate, crowded, slender, 
decumbent, plaited, crisped. 
