(277 ) 
lated regions, one from Mexico, the other from Colombia, while 
both too fragmentary for description, are yet clearly sefusctae in a 
wide sense, but if here described would be treated as distinct. 
25. CHara Hornemannu Wallm. Kongl. Vet.-Akad. Handlingar 
1852: 288. 1854 
C. ceratophylla Halsted, Proc. Boston Soc. Nat. Hist. 20: 182. 
1879. Not C. ceratophylla Wallr. 
Dio 12-40 cm. high, pense yellowish- or dark-green, 
cee facristed: stems 0.7-1.5 mm. in diameter, essentially triply 
rticated, the cortical seek often developing secondary cells 
on err sides, but these usually elongating in one longitudinal direc- 
tion only, the cortication thus appearing double, the primary cortex- 
cells somewhat larger and more prominent than the secondary; 
spine-cells very conspicuous, somewhat scattered on the lower parts 
of the stem, crowded near the apex, attaining a length o mm., 
lodes forming a single whorl at each node, twice as many as the 
— or fewer, similar to the spine-cells, 2.5-ro mm. long, 0.35- 
wide: leaves 8-10 in a whorl, 1-2.5 cm. long, usually 
containing 4 internodes, entirely uncorticated ; leaflets 2~4 mm. long 
-25-0.5 mm. wide, as bracteoles similar, much exceeding the sporo- 
carps : antheridia 1-1.2 mm. in diameter; mature sporocarps I-1.3 
mm. long, 0.65-0.8 mm. wide; odspores 0.56~-0.8 mm. long, 0.4- 
0.48 mm, eos with 5-7 striae; whorl of crown-cells about 0.175 
mm. high, 0.2 mm. wide at base, ovate, the cells connivent. 
Type igesige: : Crab Island, West Indies. 
Distribution: Tropical and subtropical America from southern 
Florida and New Mexico through the West Indies and Mexico to 
southern Braz 
He ‘Kitz. Tab. Phyc. 7: pl. 48. f.z; A. Br. Fragm. 
Monogr. Char. fl. 2. f. 74; pl. 3. fo 75 (?). 
26. Chara Nordhoffiae (Allen) 
C. Hornemanni Nordhoffiae Allen, Bull. Torrey Club 27: 299 
pl. 12,73. 1900. 
Dioecious: closely allied to C. Hornemanniz Wallm., but of 
somewhat different habit, owing to the longer internodes and more 
eae mes leaves: 0.25-0.5 m. high, not incrusted; stems 1-1. 5 
iameter, cortex much as in C. Hornemannzt, but the pri- 
mary cortical cells distinctly more prominent than the secondary ; 
spine-cells few on the lower internodes of the stem, more frequent 
but not crondes oe usually about 5 mm. long, but reaching a 
maximum length of 9 mm., 0.36-0.44 mm. wide: stipulodes forming 
