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Ptilota dentata sp, nov. 

The root is a small disc. The frond is cespitose, compressed, 4-10 cm. high, 2-3 mm. broad, compress - 
ed, and has a more or less distinct immersed midrib which becomes gradually fainter upwards, The 
branches are erecto-patent with rounded axils; the proliferous branchlets, which are always narrowed at the 
base, issue from the axils of pinnules. The pinnules are broad at the base, pointed at the apex, and about 
1 mm. long. They are incurved when young, but erecto-patent or somewhat recurved when old. They 
have on excentric monosiphonous axis, and are corticated to the apex. The involucre of the cystocarp 
C 
onsists of 7 or 8 ramuli which are cylindrical and tapering towards the apex. The spores are mostly in 
{yo or sometimes three roundish masses surrounded by a colorless membrane. The color of the frond is 
deep-red or brownish-red, turning dark-red on, drying. Its substance is cartilaginous, and it adheres 
imperfectly to paper except the younger soft portion. 
Pl, IV.:—Fig. 1. Mature frond with cystocarps (nat. siz.); Fig. 2. Portion of frond with tetrasporic 
sori. Fig. 3. Half of the cross-section of frond. (x38). Fig. 4. Portion of frond with single cystocarp 
in the axiles of pinnules, (mag.) Fig. 5. Sorus of tetraspores. 
っ 292 とぶ ゃ へ > nite § 
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