ee Sr 
KEY TO THE HIGHER ALG OF THE ATLANTIC COAST. 485 
X.? Pinnate; branches mostly opposite and compound, . . . . . 118 
Y.’ Very densely tufted; often distorted; livid E ian: ELE 
Z? Similar, except in fruit, to Polyides, or eat at ee 8h 
a.’ Frond multifid; laciniz very long, reves aN oe EO 
a.° Frond pinnately decompound, aie a eee e 
b.? Much branched; older parts kilid; ; Pind oes ALO 
¢.’ Branches spreading; covered with small Titaha, ieecien Be 
e? Branches straggling; often revolute; shorter and stouter, 
- Internodes entirely diaphanous; surface cells only at the nodes, e? 
d.? Coa arser; internodes not e diaphanous; common and var- 
e, . 121 
6? Joints everywhere 3 as long as broad ; or a alugic online cell 
ormipg mats o 
@.” Frond of equal diatas eras house lowes joint rosy 4 to 6 
times as long as broad; upper shorter - 12 
®.* Attenuated above: lower j joints 3-4 times = fae as Mente: A 
f. Nodes swollen: internodes pellucid, JR fut Fas 
” Nodes not swollen: lower ternodenal 
- Pinne opposite, énitkes the one aaa leat, t the other 
branch-like pinnately-comp ; 
8? Pinnæ opposite, mostly similar E E a ae: y 
5 Pinnæ articulated : dark pu roles diites w pami argent 128 
a. Pinne unequal: northern: rare in America, E a s ARE 
1.” Branchlets very numerous, incurved,. . . + + + + + + +129 
A Adheres closely to paper: common : variable, 130 
k.? Frond shr a -_ pyramidal, with an caren: main -stem 
which is not obviously articulate, . i 
k.? Frond ieee: oe or alternately dechin genial with atéhotomous 
mares color not rose- Pets commonly drying pale 
or brown red x dy Meer Deraan Ge 
Fronds alternately P a a pair ve minute opposite 
branchlets at each node; mostly brillian 
ea few and distant, with whorls ms f opposite Ja at r 
apex, 
Without above: damas: an inc ei or more high. de nsely 
tufted, mostly rose-purple, and sie at jointed wore es 
+. Frond 41 inch, rolag oe cement: fonttod mee sea 
= Frond 4 inch or less high: parasitic, not rising from matted 
i thre a 8, om mostly but slightly branched, - - - + + >» 
es mes as long as broad, . . i 
eg Without above characters, a 
Densely tufted: bright rose seule aments ‘Aner than human 
` Mair: joints 3-8 times as long as broa 
