18 Rhodora [JANUARY 
TumBLE-WEEDs.—In many instances the fact whether an annual 
plant be a tumble-weed or not, depends upon the conditions of its 
growth and exposure to strong winds. This is well illustrated by the 
following example. In the thin grass near trees at the Michigan 
Agricultural College, Zrifolium procumbens has grown for thirty years 
or more without showing any symptoms of acting as a tumble-weed. 
In a grass garden begun on stiff clay in 1888 a patch two yards square 
of this clover was planted and kept free from grass and weeds. The 
clover plants became larger than usual and in autumn, to my surprise, 
they broke loose from the soil and went nicely with the wind for some 
distance. 
In central Michigan I have seen the following plants act as tumble- 
weeds, and they all now grow or may soon arrive in many parts of 
New England. 
Amaranthus albus. Trifolium procumbens. 
Panicum capillare. Cycloloma platyphyllum. 
Agrostis scabra. Oenothera biennis. 
Lepidium apetalum. Gypsophila elegans. 
Salsola Tragus. 
This fall in clearing off the tops of Statice Limonium, where a 
clump of it grew in the Botanic Garden, I observed that the old 
stems were decayed near the ground and made no resistance as the 
cluster of stiff tops were taken hold of. Here, I thought, is another 
tumble-weed, for all it lacks is a good breeze. This observation on 
Statice makes me wish to hear from botanists of New England regard- 
ing its habit on their coast. Can anyone enlarge the above list of 
plants? — W. J. Bea, Michigan Agricultural College. 
CvcLoLoMA on Cape Cop.—On August 22 last I collected in 
Orleans, Mass., a plant which was determined at the Gray Herbarium 
as Cycloloma platyphyllum, Moquin. It was growing in dry sand by 
the roadside, about half a mile from the railroad, and I did not notice 
more than the one plant. This seems to be a new and extralimital sta- 
tion for this plant, the ordinary range for which is from Manitoba 
westward and southward. — Jonn Murpocu, Jr., Roxbury, Massa- ` 
chusets. 
Vol. 2, No. 24, including pages 227 to 260, plate 21, and title-page of the vol- 
ume, was issued December 19, 1900. 
