1g2 BOTANICAL GAZETTE [SEPTEMBER 
is Eriocaulon septangulare With. The material collected at the 
Alexandria end of the bridge by Vasey and Coville, and Maxon’s 
1900 collection along with Steele’s Anacostia material, soon to 
be mentioned, were made the basis of the new var. reticulata A. 
A. Eaton. 
10. Mount Vernon, Va., is on the west bank of the Potomac 
about 11*™ south of Alexandria, Va. A specimen in the National 
Herbarium, collected at this place, bears the data: ‘Mt. Vernon, 
Va., July 4, 1889. Shore of the Potomac at the foot of the Mt. 
Vernon estate, Collector F. V. Coville.’”’ The collector describes 
(2m ditt.) the station as being ‘‘at the slope immediately in front 
of the house and therefore a hundred yards or more (100™) 
north of the boat landing. There was a considerable area here 
in shallow water covered with Isoetes. The soil was gravelly.” 
11. Notley Hall, Mad., is on the east shore of the Potomac 
River, nearly opposite the mouth of Hunting Creek, Alexandria, 
Va. A-specimen in the National Herbarium was collected at 
this place by F. V. Coville in 1894. 
12. hour Mile Run, Va.—This creek enters the Potomac 
from the west about midway between Washington, D. C., and 
Alexandria, Va. Its lower course forms a wide bay, along 
the south side of which the banks are being eroded by wave 
action, which carries away the finer material, leaving a gently 
sloping tide-beach of mingled sand and gravel, on which Isoetes 
grows luxuriantly. The first collection at this station was made 
by E. S. Steele, August 5, 1898. The writer visited this place 
and made collections on August 22, 1902. 
13. Anacostia River crosses the District of Columbia east of 
Washington, D. C., and empties into: the Potomac River just 
south of that city. On September 1, 1900, E. S. Steele dis- 
covered Isoetes ‘‘on the southeast bank of the Anacostia River 
nearly opposite the Navy Yard, perhaps a half [one-fourth | 
mile below the Navy Yard bridge.’’? This collection forms a part 
of the type material of var. reticulata A. A. Eaton. 
14. Sugar Loaf Creek is a small stream which empties into 
Gunpowder River, western shore of Maryland, from the north, 
9In a letter to the writer. 
