Plate XI. 
, Fig. 41. STEIARIA ATTENUATA. 
Colour, Pale olive. 
Substance. Delicately membranaceous. 
Character of Frond. Tbread-sbaped {filiform) ; tufted ; branched. Stem branched on each 
side. Branches long, simple ; or sometimes re-branched. Branches and branchlets 
mostly opposite ; tapering at each end ; marked, when in fructification, with dark 
rings or bands. Boot, a disc. 
Measurement. From 3 to 12 inches long. 
Fructification. Minute seeds {spores) in clusters (accompanied by fibres), forming rings or bands 
round the branches. 
Habitat. Our coasts generally. Growing on other algee between tide-marks, and in from 
4 to 5 fathom water. 
The mode of branching varies occasionally ; but the marked character of tapering 
extremities never fails. 
Fig. 42. PUNCTARIA LATIFOLIA. 
Colour. Pale olive-green ; sometimes darker in age. 
Substance. Thin ; delicately membranaceous ; semi-transparent ; almost gelatinous when 
young ; afterwards coarser. 
Character of Frond. A leafy expansion ; flat ; ribless ; more or less oblong ; tapering suddenly 
at the base into a short stem ; tip sometimes obtuse, and sometimes pointed ; margins 
wavy ; growing in tufts. 
Measurement. From 8 to 16 inches long ; from 1 to 3 wide. 
Fructification, Dot-like groups of seeds [spores) scattered over both surfaces of the frond. 
Habitat. Sidmouth and Torquay. Belfast and west of Ireland. On rocks and algie between 
tide-marks. Not very common. 
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