I if AT 
gog] WIELAND—WILLIAMSONIAS OF MIXTECA ALTA 431 
os if not the most primitive of all the angiosperms. In 
pendentl vetoes ese: the first; though HALLIER soon inde- 
y reached similar conclusions as to the origin of the Magno- 
a and likewise cited Liriodendron. 
eco. and PARKIN visualized in the Annals oj botany the 
crown of i Gree co cadean angiosperm ancestor with its 
surmounted a ieee dase 5 irally inserted microsporophylls 
a. y similarly set carpophylls; and these authors at the 
etn tae much further the idea that the true mode of angio- 
all its broad eeaser long completely hidden, was at last indicated in 
3 aes outlines by — direct evidence. 
a Racha and PARKIN Ss ancestral stage we certainly behold a 
a. and decidedly plastic type, which they choose to call 
under SE though I perversely prefer to group such plants 
hypothetic ae S old term of proangiosperm.’ It is one of the 
= orms, moreover, which is not only so readily conceivable 
. infinity of modifications in the direction of higher 
Blentiy : one which, as I have long since told ARBER, we may con- 
Sl will yet be found in the fossil stage. 
into th . ae this progress, the actual mode of modification leading 
re complex types of angiospermous flowers has remained 
grow “ : . 
Sa hemiangiosperms,” as he has proposed. I duly 
s of importance that they receive a more thorough consideration than can 
be accorded 
them here. 
should duly honor SAPORTA as 
psed an important truth when 
To claim that the proangio- 
. ae the angiosperms, could have their gymnos 
iid He ude other truly lineal families, 
Diane m the Cycadeoideae at best. For these reasons, 
at ae that to use fairly the term hemiangiosperm we farth 
’ ere by another hiatus the proangiosperms merge into the more primitive 
fern derivatives. 
