1897.] Botany. 63 
Viola pedatifida, Desmodium sessilifolium, D. illinoense, Baptisia 
leucantha, Psoralea melilotoides, Petalostemon candidus, P. violaceus, 
Ammania coccinea, Rotala ramosior, Spiræa lobata, Eryngium yuccefo- 
lium, Thaspium aureum trifoliatum, T. bardinode angustifolium, Acti- 
nella acaulis glabra, Aster shortii, Boltonia asteroides, Eclepta alba, 
Helianthus grosseserratus, H. hirsutus, H. mollis, H. occidentalis, Eupa- 
torium altissimum, Kuhnia eupatorioides, Liatris squarrosa, Solidago 
rupestris, Asclepias sullivantii, Phacelia purshii, Cuscuta decora, Cono- 
bia multifida, Gerardia auriculata, Seymeria macrophylla, Lippia lan- 
ceolata, Euphorbia dentata, Populus heterophylla, Smilax bona-noz, §. 
ecirrhata, Juncus scirpoides, Carex conjuncta, C. shortiana, Poa brevi- 
folia, Equisetum levigatum.—E. L. MosELEY, Sandusky, Ohio. 
The Systematic Arrangement of the Protophyta.—[In a re- 
-cent study of the families and genera of the Protophyta I have reached 
some results which involve a rearrangement of the group, the general 
outlines only of which may be given here. It is, of course, here as else- 
where, a matter of individual judgment as to the value to be assigned 
to any structure in determining the place which a particular plant must 
occupy in a system, and it is doubly difficult when we are dealing with 
such minute and simple structures as the protophytes. Moreover, it is 
-quite probable that some of the forms now thought to be distinct are 
ônly stages of others also given specific or generic standing. Neverthe- 
less, we have here a great mass of organisms with sufficient autonomy 
to demand classification at our hands, and we may not excuse ourselves 
-from this task merely because we do not know fully the life history of 
-every species, 
The following provisional arrangement has therefore been made as a 
result of a careful study of the whole problem. As will be observed, I 
have not considered the hysterophytic habit of some of the forms as 
entitling them to be separated widely from those to which they are struc- 
turally similar. In other words, the “ Bacteria” are here not regarded 
as constituting a distinct family. Furthermore, it appears that “ Bac- 
teria” have arisen at various points in the protophyte system, so that 
it is now impossible to maintain a compact group of the hysterophytic 
genera. Indeed, it is highly probable that we should admit into some 
genera both holophytic (green) and hysterophytic (colorless) species, 
as, for example, the species of Schizothrix. 
In the arrangement below, the hysterophytes are preceded by a star 
-(*),80 that the position of the “ Bacteria” may be noticed at a glance. 
