200 
THE SEAWEEDS 
A world- wide genus with six or seven Australian representatives, which 
rarely produce cystocarps. 
Frankly, I find it impossible to distinguish categorically our so-called 
species. Rhodymenias are common with us, in all the States of the Com- 
monwealth, but they are rarely found fruiting. European phycologists 
apparently have had similar difficulties. In his monograph “Die Flori- 
denordnung Rhodymeniales, ” 1931, Kylin has given great help by produc- 
ing photographic figures of the original types of leptophylla, linearis , 
Fig. 65 . — Rhodymenia australis : a, plant; b, apices, 
bearing cystocarps; c, vertical section 
of a cystocarp; d, apices, bearing nema- 
thecia; e, cross-section of lamina and 
nemathecium; f, a tetraspore; g, longi- 
tudinal section of lamina. (After 
Harvey.) 
foliifera , and stenoglossa , as also of Bory ’s corallina. Harvey identified one 
of our forms (or perhaps more) as R. corallina of Chile and Peru and 
Magellan *s Straits, but his identification is reprobated by later writers. 
The following rough grouping of our species may be of some use in guid- 
ing collectors. Fruiting forms, sexual and non-sexual, are needed in 
quantity before an exact taxonomy can be proposed. 
