120 Rhodora [Jury 
to occur in a different habitat in Pennsylvania and New Jersey. 
Stone ! reports it from “ Damp meadows or bogs in the Middle district, 
near the Delaware River, local and not common.” 
U. S. NATIONAL Museum, Washington, D. C. 
TWO NEW MYRIOPHYLLUMS AND A SPECIES NEW TO 
| THE UNITED STATES. : 
M. L. FERNALD. 
MYRIOPHYLLUM exalbescens, n. sp., herba aquatica, caule glaber- 
rimo folioso simplice vel ramoso purpureo in statu exsiccato exal- 
bescente; foliis verticillatis raro 3"* plerumque 4" 1.2-3 cm. longis, 
segmentis 7-1l-jugis capillaceis flaccidis vix subrigidis 0.5-3 em. 
longis; spicis terminalibus subnudis, floribus verticillatis inferioribus 
foemineis superioribus masculis sessilibus; bracteis fructum rare 
aequantibus spatulato-obovatis vel oblongo-cochleiformibus inferiori- 
bus serratis superioribus integris; bracteolis ovatis integris brunneo- 
marginatis 0.7-1 mm. longis; petalis oblongo-obovatis concavis 2.5 
mm. longis; staminibus 8, antheris oblongis 1.2-1.8 mm. longis; 
fructibus subglobosis angustissime 4-sulcatis 2.3-3 mm. longis, mero- 
carpiis dorso rotundatis laevibus vel rugulosis. 
Aquatic herb; the stem glabrous, leafy, simple or branching, 
purple, in the dried state becoming white: leaves verticillate, rarely 
in 3's, commonly in 4's, 1.2-3 em. long, with 7-11 pairs of capillary 
flaccid or barely a little rigid segments: spikes terminal, almost naked, 
the flowers verticillate; the lower pistillate, the upper staminate, 
sessile: bracts rarely equalling the fruit, spatulate-obovate or oblong- 
cochleiform; the lower serrate, the upper entire: bracteoles ovate, 
entire, brown-margined, 0.7-1 mm. long: petals oblong-obovate, 
concave, 2.5 mm. long: stamens 8; anthers oblong, 1.2-1.8 mm. long: 
fruits subglobose, very slenderly 4-sulcate, 2.3-3 mm. long; the 
merocarps rounded on the back, smooth or rugulose.— Ponds, pools 
and quiet streams, often brackish or caleareous, Greenland and 
Labrador to Washington, south to western Newfoundland, Cape 
Breton, southern New Brunswick, southern New England, south- 
eastern, central and western New York, the Great Lake region, 
Kansas, Arizona and southern California. GREENLAND: Ikerasak, 
July 19, 1892, Vandhéffen. LammADOR: shallow sandy-bottomed 
1 Plants of southern New Jersey 777 (1911). 
