— 72 — 
9. Porella Cordaeana (Hiiben.) comb. nov. Jungermannia Cordaeana 
Hiiben. Hepat. Germ. 291. 1834. Madotheca Cordaeana Dumort, Recueil d’ 
Obs. sur les Jung. 11. 1835. M. rivularis Nees, Naturg. Europ. Leberm. 3 : 196. 
1838. Porella dentata Lindb. Acta Soc. Sci. Fenn. 9 : 342. 1869. P. rivularis 
Trevis. Mem. 1 st. Lombardo III. 4 : 407. 1877. Madotheca dentata Massal. 
Bull. Soc. Bot. Ital. 1904: 38. M. lamelliflora Steph. Sp. Hepat. 4 : 250. 1910. 
A few years ago Miiller 1 demonstrated the fact that Jungermannia Cor- 
daeana Hiiben. was the oldest valid name for the present species. He conse- 
quently revived for it the name Madotheca Cordaeana (Hiiben.) Dumort. For 
those who maintain the Linnaean genus Porella , in place of the much later Ma- 
dotheca, the above new combination becomes necessary. The writer 2 has pointed 
out the distinctive features of P. Cordaeana, in connection with a discussion of 
P. platyphylla (L.) Lindb., and has shown that it is confined, in North America, 
to the western part of the continent. Specimens have been examined from 
Alaska, British Columbia, Washington, California, Idaho and Montana. 
10. Leptocolea cardiocarpa (Mont.) Evans, Bull. Torrey Club 38 : 268. 
pL 12, f. 1-3. 1911. Lejeunea cardiocarpa Mont.; Ramon de la Sagra, Hist. 
Cuba 9 : 476. pi. 18, f 4. 1845. 
Collected in 1918, in the vicinity of Sanford, Florida, by S. Rapp (Nos. 
Q2 & 93). New to the United States but widely distributed in the American 
tropics. In the last paper of this series the number of Lejeuneae definitely 
known from Florida was estimated as thirty-eight. Last year the writer 3 was 
able to report the six following species, all collected by Rapp in the vicinity of 
Sanford: Cololejeunea contractiloba, Lejeunea cladogyna, L. longifissa, Recto- 
lejeunea Maxonii, Euosmolejeunea parvula, and Ptychocoleus heterophyllus. These, 
together with the Leptocolea just reported, increase the total number of Florida 
Lejeuneae to forty-five. 
The most important distinctions between Leptocolea cardiocarpa and the 
closely related L. Jooriana (Aust.) Evans are found in the male inflorescence. 
L. cardiocarpa is an autoicous species and the male bracts occupy a more or less 
elongated branch, each bract bearing as a rule two antheridia. L. Jooriana, 
on the other hand, is paroicous and the male bracts, which are usually monan- 
drous, are situated close to the perianth. In other respects the species agree 
closely. 
Sheffield Scientific School, 
Yale University. 
Explanation of Plate II 
Nardia rubra (Gottsche) Evans 
Figs. 1-3. Plants with perianths, dorsal view, 15. 
Fig. 4. Plant with perianth, lateral view, X15. 
’Rabenhorst's Kryptogamen-Flora 62 : 585. 1915. 
2 Rhodora 18 : 106-109. 1916. 
3 Am. Jour. Bot. 5 : 131-150. 1918. 
