The primary root of the embryo in all Angiosperms points towards the micropyle.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1" by Various
This opening is called the "micropyle," and allows the pollen tube to enter.
"Elements of Structural and Systematic Botany" by Douglas Houghton Campbell
Micropyles: minute openings in the egg, through which spermatozoa enter.
"Explanation of Terms Used in Entomology" by John. B. Smith
The micropyle m is very wide.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5" by Various
This arillode, after growing downwards, may be reflected upwards so as to cover the micropyle.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3" by Various
Inverted and straight, with the micropyle next the hilum and the radicle consequently inferior.
"The Manual of the Botany of the Northern United States" by Asa Gray
This hole is identical with the micropyle in the seed.
"A Civic Biology" by George William Hunter
The surface of this column is in contact with a micropyle in the egg-membrane.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour