“5 Ss aS epee! deh eee | 
1893.) On the Development of the Caryopsis. 213 
der Milchreife ahnlich wird, ist durchaus erforderlich zur ge- 
naueren Betrachtung der einzelnen Schichten.” The descrip- 
tions were accompanied by a number of plates. The most 
important literature on the subject was critically reviewed in 
the light of his results. To this review, I am indebted for — 
the résumé of a number of early articles to which I have not 
had access. 
W. Johannsen brought out in 1885° the results of his study 
of the development and constitution of the endosperm of the 
he gave attention to the fruit envelopes. In minor details 
only did he depart from the results previously obtained. 
_In 1888, H. Jumelle published’ the results of his investiga- 
ons concerning the constitution of the caryopsis. As his 
conclusions differed very widely from the hitherto generally ac- 
gi view, I quote them. “A aucun moment, pendant la 
maturation du grain des Graminées, il n’y a soudre entre les 
, ra 
but oth ervations on the wheat were given in the article, 
“r cereals were studied and all contributed to the re- 
sults quoted. 
In th 
e : : 
Same year, the Same conclusions were announced in 
der scope. ® 
is often described outer is much heavier than the inner which 
_ The latest ref as the ‘‘hyaline layer.” 
Nee is found in .. to the subject that has come to my no- 
this eam Tieghem’s Traité de Botarique, where 
de ovule ment: “Chez les Graminées, le tégument » 
8 memb d €st resorbé comme le tégument interne, et 
ci Contre le agg embryonnaire vient s’accoler intime- 
tégument. uuet ne des pistil. La graine y est de 
~No. 6, 
