FRULLANIA 169 
sterile plant was thus transformed throughout, there was little, out- 
side of the axillary branching, to distinguish it from the holostipous 
Lejeuntae. The inflated cavities of the ventral lobes and sometimes 
also those of the underleaves were mostly occupied by one or 
more yellowish or colorless subspherical bodies, 40-120 и in 
diameter, probably sporangia of a fungus belonging to the order 
Chytridiales, perhaps to the genus Rhizophidium Schenk. At 
maturity, the contents of some of the globose bodies become re- 
solved into numerous minute ovoid colorless masses, 4—6 м in 
diameter. Іп both of the cases where the Pore//a was thus affected 
it was growing in company with species of Radula (Radula com- 
planata, near Mendocino, no. 707, and Radula Bolanderi, near 
McBride’s, Mad River, Humboldt Co., no. 1051). 
PLATES 115 AND 116. PORELLA NAVICULARIS, 
nd 2. Plants, 2 and 9, natural size. 
3. Portion of © plant, viewed ventrally, 12. 
4-7. Leaves, showing ventral lobes, X 12. 
8 and 9. Underleaves, 2 
то. Outline of cauline сан dorsal view, ` 12. 
11. Q branch, with young perianth, bracts, bracteole, etc., ventral view, Х 21. 
12. Mature perianth, ventral aspect, and sporogonium, ` 12. 
13. Inferior basal margin of dorsal дейі K AN: 
14 and 15. Leaves, dorsal aspect, Х 1 
16. One half of mouth of young at, Х 53. 
id Leaf-cells, X 305. 
I, 7, and 15 drawn from no. 776 (Ukiah); 2, 3, 6, 8, 11, 12, 14, and 16, 
from no. pid (Mendocino); 4, 5, 9, and 10, from no. 1215 (Mill Valley). 
35. FRULLANIA Raddi, Atti Soc. Ital. Sci. Mod. 18:--(о). 
1818. Mem. Mat. e Fis. Soc. Ital. Sci. Mod. 18: 20. 1820. 
Spruce, Trans. and Proc. Bot. Soc. Edinb. 15: 3. 1884. 
Plants large or small, depressed-caespitose, mostly reddish- 
brown, less commonly green or nearly black. Stems moderately 
stout, opaque, composed of several layers of small cells, pinnately 
ramose, the branches all lateral, each arising exactly in the axil 
of a cauline leaf, from which it is always free ; root-hairs springing 
in tufts from the bases of the underleaves. Leaves alternate, some- 
what obliquely or almost transversely inserted, complicate-bilobed ; 
the dorsal lobes incubous, obliquely ovate to suborbicular, nearly 
always entire ; ventral lobes (lobules) usually developed as inflated 
galeate, cucullate, cylindrical-clavate, or rarely digitiform water- 
sacs, or sometimes evolute, more or less distant from the stem, 
uj 
