OF SOUTH AUSTRALIA. 
151 
Gigartina crassicaulis Setchell and Gardner. 
Frond rather thick cartilaginous, flattened, distichously compound pin- 
nate ; ultimate pinnae linear ; greater ones flat, attenuated at both 
extremities. Height 30 cm. or more. Width of the flattened axis to 7 mm. 
or more. Cystocarps behind the apex of the pinnules, sessile on the flat 
face. Sori spreading along the borders of the wide axis among the 
pinnellae. Colour varying a good deal on condition, when freshest a rich 
brown-purple. 
South Australia (Eastern Bays), Victoria, Tasmania. 
Fig. 23 . — Gigartina crassicaulis : a, branch; b, fertile 
branchlet; c, ramulus with conceptacle; d, 
section through conceptacle showing structure 
of frond and spores; e, spores; f, portion of 
cortical layer and medullary network. (After 
Harvey.) 
