HARPER: VEGETATION OF THE HEMPSTEAD PLAINS 273 
account of the considerable possibility that they may have been 
introduced, or wrongly identified. The names of evergreens are 
in heavier type, and those of a few species of weedy tendencies, 
which may not have been in the prairie in prehistoric times, are 
put in parentheses. 
The nomenclature is in most cases identical with that in 
Taylor’s Flora of the vicinity of New York (1915); and where it 
differs from that it conforms with other easily accessible works. 
After the name of each species is put the numbers of the months 
in which it normally blooms, the prevailing color of its flowers 
(replaced by a dash in the case of wind-pollinated species which 
have no organs for attracting insects), and a symbol indicating 
the mode of dissemination, when known. Wind-disseminated 
species (including tumble-weeds) are indicated by Y, tonoboles* 
(i. e., plants with capsules or firm cup-like calyces borne on stiff 
stems which stand up through the winter) by T, berries and nuts 
by O, and pods which discharge their seeds by elastic force by E. 
One could go still farther and have symbols or abbreviations for 
annuals and perennials, the Raunkiaerian growth-forms, various 
types of leaf, etc.,} but it is just as well not to undertake too much 
at one time, and some of these matters—as well as the authors’ 
names, common names, phaenological curves, etc.—can very well 
be deferred to a more exhaustive study of the flora. 
The first list is for uplands and dry valleys. 
TREES 
жете populifolia. хара eee Ce eet 5---Ү 
ercus тағуанйШса.........-....----.--:---:-%5:». 5—0 
Dwercue Шаа о аео 2а 5—— О 
Т rtl" ОО САА а ЕВА ела e а а рса 5— Y 
SHRUBS 
адрес Менен: 2 жеее ше: жж meon hanh ..5-7 white T 
Salix tristis 3 2 С НТ A N A a VE ru AE 4 М 
Осие ИЮНЕ. 22-52 5— O 
(Populus она ИСАИА ОЕ ОКЕ ен, 4—— Y 
* See Clements, Bot. Surv. Neb. 7: 47. 1904. 
See Ann. N. Y. Acad. Sci. 17: 36-38 (1906) for a more elaborate method of 
treating plant association lists. 
+ This could just about as well be S. humilis. No one seems to have succeeded 
in drawing a sharp line between the two forms. 
$ This is normally a small tree, but on the Hempstead Plains it seldom gets 
more than three or four feet tall, perhaps on account of the frequent fires. 
