56 PITTONIA. 
separate from Krynitzkia by its persistent fruiting calyx, and 
from Allocarya by the absence of all carination of the nutlets, 
whether dorsal or ventral. 
Eremocarya is most excellently marked in a three fold way 
by its racemes, for they are biserial and very dense, conspicu- 
ously leafy-braeted, and repeatedly dichotomous. Moreover, 
it has a persistent open calyx and an enlarged persistent style. 
Piptocalyx we may suppose to have been referred to Kry- 
nitzkia upon the general principle that, as we are obliged to 
admit into Plagiobothrys some exceptional species with cir- 
cumscissile calyx, so we may do with Krynitzkia. But this is 
to ignore a great deal of what appertains to the question. In 
Plagiobothrys the pedicels are always persistent, whatever 
becomes of the calyx-limb, but it is far otherwise in Krynitz- 
kia where, if Piptocalyx be placed we shall have both decidu- 
ous and persistent pedicels, for these latter are very persistent 
in Piptocalyx, while in the forty species of true Krynitzkia 
the pedicels are jointed with the rachis and fall away as soon 
as the seeds are ripe. And yet, dropping even this important 
failure of analogy between Plagiobothrys and Krynitzkia, 
with Piptocalyx included, there is a still stronger argument 
for the genus last named. Its impregnable defense is its 
peculiar dichotomy, which is eymose, somewhat imperfectly 
that of our depressed and compacted Caryophyllacee. For 
genera of Asperifolie better marks than these which distin- 
guish Hremocarya and Piptocalyx are seldom found. And 
it is safe to say that if the plants were a foot or two high 
instead of three or four inches, these important matters would 
not have been overlooked, nor the species referred to genera 
in whieh, although there are geminate racemes, real dichotomy 
is unknown. 
All the known species of these several genera have been so 
recently defined in the Synoptical Flora and its Supplement 
that to redescribe them now would be superfluous. It is in- 
deed possible that confusion of species still exists in the 
