163 
all the species. The dimensions given in this paper are ex- 
pressed in thousandths of a millimetre (mikrons). 
CHARA CUBENSIS sp. nov. 
Chara diplostephana, triplosticha, gymnopus, monoica-con- 
juncta, podosteira. 
Stems 40-50 cm. in length, armed with scattered linear’spines | 
of variable length, from one-half the diameter of stems in length, 
to longer than the diameter (.360-.850 mm.); diameter of stem 
about .780 mm. The leaves usually rather shorter than the inter- 
nodes in mature plants. ; 
Stipules nearly equal or exceed the length of the lowest leaf- 
Segment, upper, about .850 long; lower .610 long. 
Leaves consist of 6-7 segments, of which the first is naked, .Q00- 
‘975 long, .550 in diameter (varies to 1.098 long, .340 in diame- 
ter); first node usually sterile, sometimes fertile ; second segment 
usually corticated, 2.500 long, .500 in diameter; third segment, 
2.200 long; fourth, 6.500 long, .600 in diameter, usually naked ; 
fifth and sixth (terminal) naked, at times the whole leaf naked. 
Bracts verticillate, anterior usually exceed the length of the 
*Porophydia, posterior slightly shorter; lateral bracts longer than 
anterior (anterior .700 long, lateral 1.100, posterior .700), sporo- 
Phydium .610 long, coronula spreading, .120 high, .220 in diame- 
ter. Nucleus -600 long, .400 broad (.585 by .425) with 12 or 13 
ridges, Antheridium .360 in diameter. In older specimens the 
leaves frequently have 7-8 nodes, in some specimens all the leaves ae 
are naked. 
: This species is founded upon a few specimens, now known only | 
in the herbarium of the Missouri Botanical Garden, collected by 
“Wright” in Cuba, at “ Guyman's,” and in the river at “ Mayan.” 
It appears to me to be allied to C. Humboldtii A. Br., but the ; 
Nucleus js smaller, so that according to Braun’s synopsis, it is 
allied rather with C. Ceylonica Klein. 2 3 
Jn Plate 189, Figs. 1 and 2 represent the stem with spines of 
variable length, the leaves with long, naked, basal segments, one 
leaf with three additional nodes (one node fertile, continued ae 
fe fig. 3), a Portion of a naked leaf, X 25; fig. 4, nucleus X 50. 
