17 
some, as in Stipa, it is remarkably large, extending the whole length 
of the plumule. The Avene also, so far as examined, all possess an 
epiblast. It is in the Ohloridec that the most remarkable and varying 
formations of the embryo are to be found. Eleusine (fig. 52 A-D, PI. 
VI) has a round nut-like fruit, with a small embryo having a very large 
. epiblast; while Spartina (fig. 53, Pl. VI) has a long fruit, with the 
embryo extending almost the length of the seed, but with no trace of 
an epiblast. Between these occur the genera Bulbilis (fig. 58, Pl. VI), 
Leptochloa (fig. 56, Pl. VI), Astrebla (fig. 55, Pl. VI), Cynodon (fig. 57, 
Pl. VI), and Beckmannia (fig. 60, Pl. VI), each with an epiblast. 
In the Festucew, a very large percentage of the genera have a well- 
formed epiblast, but in Bromus and some others it is absent. Among 
the Hordew, Secale (fig. 67, Pl. VIT) and Hordeum (fig. 35, Pl. IV) are 
without an epiblast, while in Lolium (fig. 70, Pl. VIII) and Triticum 
(fig. 69, Pl. VII) it is present, Elymus (fig. 72, Pl. VIII) has a very 
light projection at the point where the epiblast is usually situated, and 
might be regarded as a transition stage between those with and those 
without an epiblast. 
Among the Bambusec only the genera Arundinaria (figs. 74, 75, 76, 
Pl. VIII) and Bambusa have been examined. They possess very large 
broad epiblasts. 
It appears, therefore, in most cases that the tribes Maydee, Andro- 
pogoneæ, Zoysiew, Tristeginee, and Panicec are without epiblasts, while 
in the Oryzew, Phalaridew, Avene, Chloridec, Hordee, Festucew, and 
perhaps, the Bambusee, it is usually present. 
The following table will show that it is not correct to regard the 
epiblast as usually wanting in the Graminex. 
MAYDEX. 
Without epiblast. With epiblast. 
Euchlaena. 
Zea. 
Coix. 
Tripsacum. 
ANDROPOGONEE. 
*Saccharum.! 
Andropogon. 
* Erianthus. 
Apluda 
ZOYSIEJE. 
Perotis. Zoysia. 
* Trachys. | Nazia 
Anthephora. | 
d by the writer. 
The genera starred (*) are taken from Bruns’ work, not examine 
No. 19——2 
