Bulletin - United States National Museum - Smithsonian Institution

FLORA OF WASHINGTON AND VICINITY. Ill
t Celtis occidentalis, L. Hackberry. Sugarberry.
Early part of May.
Humulus Lupulus, L. Common Hop.
Rock Creek, near the Adams Mill; rare. August.
Cannabis saliva, L. Hemp.
Waste lots in the city. August.
Madura aurantiaca, Nutt. Osage-Orange. Bois c'arc.
Deserted hedges, growing thrifty and bearing fruit. End of May.
tMorus rubra, L. Red Mulberry.
Middle of May; fruit ripe in June.
Morus alba, L. White Mulberry.
Roadside near Uniontown (Prof. J, H. Comstock), May 7, 1881.
tUrtica dioica, L. Nettle.
July.
tLaportea Canadensis, Gaudichaud. Wood-Nettle.
July.
t Pilea pumila. Gray. Richweed. Clearweed.
August.
tBoehmeriacylindrica, Willd. False Nettle.
Two forms; a slender, narrow-leaved, and a shorter, broad-leaved one. July '
August.
Parietaria Pennsylvanica, Muhl. Pellitory.
Below the Insane Asylum. First week in June. '
PLATANACEiE.
Plane-Tree Family.
tPlatanus occidentalis, L. American Plane-Trek. Sycamore. Buitonwood.
First week in May.
JUGLANDACEiE.
Walnut Family.
Carya alba, Nutt. Shell-bark Hickory. Shag-bark Hickory.
Rare, and perhaps only as intentionally planted. Middle of May; fruit, September
or October.
Carya microcarpa, Nutt. Small-fruited Hickory.
It is to be hoped that this may be ultimately retained as distinct from C. alba.
The differences in this locality are immense. First week in May; fruit in October.
t Carya tomentosa, Nutt. Mocker-nut. White-heart Hickory.
Second or third week in May ; fruit, October or November.
t Carya porcina, Nutt. Pig-nut. Broom Hickory. Brown Hickory.
First week in May ; fruit, October.