304 
THE SEAWEEDS 
Lenormandia marginata Hook, fit et Harvey. 
Frond 15 cm. to 25 cm. long and as much in the expansion of the pro- 
liferous phyllodia. Primary pliyllodia 6 cm. to 12 cm. long, 1 cm. to 2 cm. 
wide, obtuse at each end, oblong, emarginate at the extremity, traversed 
by a very slender (sometimes obsolete) midrib, and bordered with 
abundant ciliary processes, rarely absent. Secondary and tertiary phyllodia 
spring from the margins; in older fronds many more arise from the disc 
and spread in all directions. Surface of disc or phyllodia commonly smooth 
and naked, marked with faint decussating lines; occasionally bearing 
processes. Fruits marginal, occasionally on the disc. Cystocarps ovate, 
shortly pedicellate, opaque, with thick walls, containing a tuft of narrow- 
pyriform spores. Stichidia linear-lanceolate, acute, densely cellular contain- 
ing a double row of tetraspores. Colour pale blood-red, darker on drying. 
Substance firmly membranaceous, adhering imperfectly to paper. 
South Australia (Pennington Bay (Kangaroo Island), Robe), Tasmania. 
Fig. 144 . — Lenormandia marginata: a, plant; b, frag- 
ment of a leaf, with marginal ceramidia; 
c, section of a ceramidium; d, spores; e, 
fragment with marginal stichidia; f, 
stichidium. (After Harvey.) 
