338 BULLETIN OF THE BUSSEY INSTITUTION. 
that the awns are normally straight but many of them curl in the 
process of drying. It is noticeable also that, in drying, the points 
of some of the awns curl one way and some another; that is to 
say, some of the awns bend inward toward the centre of the flower 
and others bend outward. ‘The same diversity in direction will be 
found in the figures given in the books. ‘Thus, Professor Asa 
Gray, in his ‘‘ Manual of the Botany of the Northern United 
States,” gives a figure of the awn of H. /anatus that has a pro- 
nounced curl outward; and several other authors might be men- 
tioned who give somewhat similar figures, among them J. 8. Gould, 
in his essay on ‘‘Grasses and their Culture,” published in the 
‘‘ Transactions of the New York State Agricultural Society for 
1869,” p. 351, plate 53, fig. 184. So too Langethal, in his ‘* Die 
Stissgriser,” Jena, 1855, p. 84, table IV., makes the awn curl out- 
ward though in a much feebler way than Gray. But Jessen, in his 
‘¢Deutschlands Graser,” Leipzig, 1863, pp. 56, 106, figures the 
awn of H. lanatus with an emphatic hook inward. There are 
some figures in Ettinghausen & Pokorny’s ‘* Physiotypia Plantarum 
Austriacarum,” Vienna, 1855, vol. I. plate 97, which are specially 
interesting in their bearings on this note because they were made 
by the nature-printing process (phytoglyphy) and must necessa- 
rily truly represent the dried plants from whose imprint they were 
taken. In these figures most of the awns turn inward toward the 
centre of the flower, while some turn outward and some are straight. 
Many straight awns are visible also on a typical dried specimen*of 
H. lanatus contained in a collection of the agricultural grasses 
of Germany, made by Dr. A. B. Frank, Custodian of the Univer- 
sity Herbarium at Leipzig, which belongs to the Bussey Institution. 
It is true, moreover, that several of the books relating to grasses 
that are contained ‘in the library of the Bussey Institution * give 
figures in which the awns of H. lanatus are represented as being 
straight. Indeed, several authors recognize two species or varieties 
of holeus — the one called A. lanatus and the other AH. mollis — 
which really appear not to differ from one another in fact any more 
than fresh and dried specimens of the plant /. /anatus do naturally 
differ. Langethal tells of the prominent awns of H. mollis and 
the short awns of H. lanatus, and he figures them also; but a com- 
parison of his figures suggests the thought that the /anatus awns 
* It should be said that in reporting these notes I have confined myself to 
the references and authorities which were readily accessible to Mr. Ford, and 
- which I know were consulted by him. — F. H. Storer. 
