89g 
Gen. Odonthalia, Lyngb. 
O. dentata, Lyngb. Frequent. 
fie:: Harvey II, 98. 
District : In all districts. 
Zone: L.W.O.S.T. and below. 
Occurrence: Perennial. 
Reproduction: Cystocarpia in Spring and Summer; tetraspores in 
Spring and Autumn. 
Notes: This is a plant of deep water situations. It can be found 
attached in pools at low water level but is more frequently 
met with as a cast-up. 
Gen, Laurencia, Lamour. 
L. obtusa, Lamour. Frequent. 
fie.: Harvey li, 137. 
District: In all districts. 
Zone: L.W.O.N.T. downwards. 
Occurrence: Annual, Summer. 
Reproduction : Cystocarpia and spermatia in August. 
Notes: Plant dark red at first but turns yellow with exposure to 
bright illumination. 
L. hybrida, Lenor. Common. 
Fig.: Harvey II, 136 [as L. caespitosa}. 
District: Port Erin; Port St. Mary; Castletown; Pooyllvaaish. 
Zone Mal. zone to L.W.O.N.T. 
Occurrence: Perennial. 
Reproduction: Spermatia in Winter; cystocarpia and tetraspores 
in Spring. 
Notes: Very common plant in Spring on the limestone terraces at 
Port St. Mary. It occurs on limpets, as the floor covering 
of shallow pools and as a carpet in inter-pool vegetation. 
It is a perennial with great powers of proliferation. 
L. pinnatifida, Lamour. Abundant. 
Bie: Harvey Il, 135. 
District: In all districts. 
Zone: M.T. zone downwards. 
Occurrence: Perennial. 
Reproduction: Cystocarpia, spermatia and tetraspores in Winter. 
Notes: Generally occurs fringing the edges of pools. 
Gen. Chondria, Ag. 
C. tenuissima, Ag. Occasional. (See note 16, p. 116.) 
Fig.: Harvey II, 139 [as Laurencia tenuissima]. 
District: Port Erin; Douglas Bay (Talbot). 
Zone? L.W-:O:S. 1. 
Occurrence: Annual, Summer. 
Reproduction: Tetraspores in Summer; no other data available. 
