120 Harper: TRIP ON WARRIOR AND TOMBIGBEE RIVERS 
lina, Mollugo verticillata, Echinochloa Crus-galli, Tripsacum dacty- 
loides. 
5. Species believed to have been introduced from the tropics 
in modern times. (There seem to be no European weeds along 
these rivers.) 
Cardiospermum Halicacabum, Boerhaavia erecta, Leptochloa 
mucronata, Eleusine indica, Capriola Dactylon, Sorghum halepense. 
No information as to relative frequency or local distribution is 
given in these five lists, but some of the most abundant weeds are 
mentioned in the first table. Perennials seem to predominate in 
the first and third classes and annuals in the fourth, but in the 
whole list of 40 weeds they are about equal in number. 
The following notes on particular species are believed to add 
something worth knowing to our present stock of information 
about the distribution of each. Specimens of some of them have 
already been distributed, and such are indicated by numbers. 
CAMPANULA AMERICANA L. 
Still in bloom on Oct. 16 near the base of St. Stephens Bluff, 
Washington County, a perpendicular cliff of “‘ White Limestone” 
about 75 feet high, which faces nearly north. This species is 
confined chiefly to the Alleghanies and northward, and had never 
before been reported so far south. 
SicyOS ANGULATUs L. 
A common vine on densely wooded alluvial banks; seen on 
every day of the trip, in every county passed, and perhaps over 
every formation. Still in bloom. Dr. Mohr does not seem to 
have seen this in Alabama himself, but he reported it from a 
single locality in Autauga County, where it was collected by Dr. 
Smith. I have never met with it in any other southern state. 
HOusTONIA ANGUSTIFOLIA Michx. 
This is a comparatively rare species, but pretty widely distrib- 
uted, with a remarkable range of habitat, from limestone rocks to 
dry sand, both in Georgia and Alabama. On this trip I found it 
on St. Stephens Bluff, with Campanula americana. Dr. Mohr 
knew it only from dry ridges. 
