doubt. This has been particularly true in the case of milo 
and kaoliang, which are not listed in such authoritative 
manuals as Bailey (7) and Hitchcock (2). 
Within the last few years considerable progress has 
been made toward a better and more accurate under- 
standing of the group. The typification of the generic 
name Holeus by H.lanatus 1.., in accordance with the 
rules of the Sixth International Botanical Congress, has 
rendered the generic name Sorghum available for the cul- 
tivated sorghums. This eliminates the confusion which 
arises when these plants are considered as species and 
varieties of Holcus. 
In 1985, J. D. Snowden published a classification of 
the cultivated sorghums (3) and followed this, in 1986, 
by an exhaustive monograph (4) dealing with all the cul- 
tivated races of sorghum. In this latter work the author 
discusses the taxonomic position and botanical history of 
the various types in great detail, and gives, as well, much 
valuable information in regard to the cultural features of 
the plants concerned. Snowden, following the Kuropean 
custom, considers the chief groups of Sorghum to be dis- 
tinct species, and lists some 81 species, 158 varieties and 
524 unnamed forms. Probably few American botanists 
will care to adopt this treatment, preferring to treat the 
majority of the cultivated forms as varieties of a single 
polymorphic species. Snowden, nevertheless, has made 
a distinct contribution and one that should be accept- 
able to everyone, in that he makes clear the identity of 
all the larger groups, indicating their nomenclatorial his- 
tory and citing full synonymy as well. As a result of his 
work one can now list the American sorghums more 
completely and more accurately than has hitherto been 
possible. 
The object of this paper is to assign names to those 
sorghums which are not treated in Bailey or Hitchcock, 
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