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corticated internodes of almost ne length, the basal ‘internode 
neither shortened nor uncorticate a I- or 2-celle anes 
leaf-tip, whi chi is somewhat shorter han, or sometimes as long as, t 
lo 3 
crown-cells rather short and blunt, sometimes connivent, sometimes 
slightly diverging, 0.07—-0.1 mm. hi gh, 0.14 mm. wide. 
Type locality: Valley of Mexico. 
Distribution : Mexico. 
. CuarRA CONTRARIA A. Br.; Kiitz. Phyc. Germ. 258. 1845 
Monoecious: 10-50 cm. high, lightly or more often heavily in- 
0.5~3 cm. long, sometimes entirely uncorticated, or more often with 
I-5 corticated internodes, and an uncorticated 1-5-celled leaf- aay 
leaflets usually very short, rarely ria ng o — mm, eee ae 
rior ncarly always the longer ; anterior bracteol $0. 6- 
ere the internodes both above and below are uncorticated; an- 
theridia 0.3-0.58 mm. in diameter; sporocarps 0.88-1.1 mm. pore? 
0.5-0.65 mm. wide; odéspores black or dark-brown, 0.6-0.72 mm. 
long, 0.35-0. “49 mm. wide, with 10-13 striae; whorl of crown- Sei 
0.12~-0.16 mm. high, 0.22-0.28 mm. wide at base, the individual 
cells oblong, Founded at the apex, erect but not connivent. 
Type locality: Germany. 
Distribution: Quebec and Alaska to Mexico; Europe, Asia, 
Africa, and Australia, according to Braun. 
Illustrations: Kiitz. Tab. Phyc. 7: p/. 6z; Jour. Bot. 19: AZ. 
