488 KEY TO THE HIGHER ALGE OF THE ATLANTIC COAST. 
140. CALLITHAMNION AMERICANUM Harvey. New York and North. 3-4. 
141. CALLITHAMNION PYLAISEI Montague. Cape Cod and North. 3-4. 
142, CALLITHAMNION FLOCCOSUM Agardh. Massachusetts. 4-3. 
143. CALLITHAMNION CRUCIATUM Agardh. New York. 1-14. 
Ag st. 
i 
— 
. CALLITHAMNION TU 
14%, CALLITHAMNION LUXURIANS Agardh. New York and North.— 
146. CALLITHAMNION ROTHII Lyngby. Connecticu 
147. CALLITHAMNION VIRGATULUM Harvey. New eatin 
48. C HAMNION DAVIESH Agardh. Massachusetts.— 
149, CALLITHAMNION TENUE Harvey. New Jersey. 3-4. 
eal 
EE 
foni 
BS 
* PART III. CHLOROSPERMEZ. 
(GREEN ALG.) J 
PLANTS grass-green, rarely brownish, bluish or purple, a few low 
forms red. Propagation in our species by simple cell-division, 
or by transformation of the coloring matter (endochrome) | of & 
cells of the whole or a part of the frond, into me In 
waters and damp places.* a 
A. Fronds Jilamentous, articulated; éendochrome diffused : H 
spores amallss: ies roy naa aa E 
A. Fronds various, never truly jointed. . . . + + + 
B. Frond tubular and hollow often branched or else broad w M 
flat, membranous, composed of simple quadrate cells. ' i 
B. Fronds composed of a simple filiform often pre, 
; branching cell, or of many such cells united into & 
sponge-like body; often bright green a plume-like- 
oe ienen SIPHONACEE. É 
B. Frond with an annulated pith, composed of very short re 
lules, surrounded by a membranous, inarticulate, 
Omar wean, o o CILLATORIACE: 
B. Microscopic, wnicellular ; growth by semisection of the cell. 
ULVACEE: 
C. Olivaceous or purplish, pi aie ak “ple Wee 
Onin fruits osc PORPHYRAC 
C. Color bright green at all times. . . 
* For een te of our numerous joe water Chlorosperms venga excellent 
arrangement of families than the one her adopted, see Prof. C. gai 
'“ Contrib reine to the History of the Fresh Water Algæ of North “America. 
