OF SOUTH AUSTRALIA. 
323 
TYLOCOLAX Schmitz., 
Frond parasitic, rising from within the thick cellules of the parent 
stem, forming a sub-lobate swelling or cushion; five central cells; the 
rhizoids corticate; monopodial growth; the fruit is found in the swelling 
or cushion. Stichidia linear, elongate, immature ones are subarcuate. 
Tetrasporangia in two rows in the stichidia. Antheridia ovoid. Cysto- 
carps ovoid, shortly pedicellate, pericarp thin. 
Tylocolax mictocarpus Schmitz. 
The only species with the characters of the genus. Growing on 
Lenormandia spectabilis. 
Southern Australia. 
Family CERAMIACEAE ( Bonnemaison) Naegeli. 
CONSPECTUS OF THE SUBFAMILIES. 
I. — Fronds extremely confervoid, young fronds always uniseriate, 
articulate. 
Spermothamnieae. Fronds filiform, usually naked, laterally branched. 
Cystocarps terminal, often involucrated with ramuli, gonimoblasts 
one to two composite. Sporangia triangularly divided, sometimes 
polysporous (spores 60 or more). 
Griffithsieae. Fronds naked of clothed with short verticillate ramuli. 
Cystocarps on ramuli proper, terminal, involucrate. Gonimoblasts 
(nucleus) composed of one to two gonimolobes. Tetrasporangia 
triangularly divided. 
Monosporeae. Fronds filiform, naked. Cystocarps on fertile ramuli, 
terminal, formed from a single gonimoblast, involucrated in 
various ways. Sporangia triangularly or radially divided into 
many parts. 
Callitkamnieae. Fronds filiform, naked or corticated with down- 
wardly directed rhizoids. Cystocarps lateral (sometimes 
apparently terminal), not involucrate, gonimoblasts double (rarely 
single). Tetraspores cruciately or triangularly divided. 
Spongoclonieae. Fronds naked when young, long, becoming corticated 
with lateral ramuli of spongy-intricate texture. Cystocarps on 
short terminal ramuli (apparently laterally fixed), involucrate. 
Gonimoblasts evolving from successively formed round gonimo- 
lobes. Tetrasporangia triangularly divided. 
II. — Branches naked or with short ramelli, or corticated with rhizoids or 
with a true continuous cortex. Cystocarps usually involucrated with 
numerous ramelli. 
Ptiloteae. Fronds filiform and terete, or plane and two-edged. Cysto- 
carps on fertile terminal pinnae, or apparently lateral. 
Tetraspores triangularly divided. 
