\ 
OF SOUTH AUSTRALIA. 163 
GELINARIA Sonder. 
It is at present doubtful as to the systematic position of this very hand- 
some genus. The cystocarps have not been seen and the embryology is 
unknown. The general structure, internally tubular with anastomosing fila- 
ments and a similar cortex, as well as the cruciate tetrasporangia, seem to 
show a close relation with Kallymenieae and Cystaclomeae. 
Two species have been described. 
Gelinaria ulvoidea Sonder. 
Holdfast a fleshy disc, half an inch in' diameter. Stipes compressed 2 cm. 
to 5 cm. long, firmly cartilaginous, expanding into the cuneate base of the 
frond. Frond 25 cm. to 60 cm. long, and nearly as much in the expansion 
of the segments, repeatedly and irregularly pinnatifidly divided. The 
principal segments are 2 cm. to 5 cm. broad, distantly pinnate with linear- 
lanceolate branches, the tips acute. The colour a rich crimson-lake, and the 
pigment runs when the plant is placed in fresh water. 
Western Australia, probably South Australia. 
Fig. 36 . — Gelinaria ulvoidea : a, plant; b, section through 
the frond; c, minute portion of the cortical 
stratum. (After Harvey.) 
