archicarp

They arise as short branches at a point where two filaments cross; one of them (Fig.  39, _C_, _ar. _), the female cell, or "archicarp," is somewhat larger than the other and nearly oval in form, and soon becomes separated by a partition from the filament that bears it.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

_C-F_, development of the spore fruit, × 300. _ar. _ archicarp.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

It is more slender than the archicarp, but otherwise differs little from it.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

_Ascobolus_, 71-73; Fig.  43. culture of, 71. spore fruit, 71. archicarp, 71. spore sacs, 72.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

The spore fruits arise from filaments not unlike those of the mildews, and are preceded by the formation of an archicarp composed of several cells, and readily seen through the walls of the young fruit (Fig.  43, _B_).

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

In the latter the archicarp branches, each branch bearing a spore sac

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

There next grow from the inner surface of the covering cells, short filaments, that almost completely fill the space between the archicarp and the wall.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

Shortly before the fruit is ripe, the upper cell of the archicarp, which has increased many times in size, shows a division of its contents into eight parts, each of which develops a wall and becomes an oval spore.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

The antheridium undergoes no further change, but the archicarp soon divides into two cells, -- a small basal one and a larger upper cell.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

The other branch (antheridium) grows up in close contact with the archicarp, and like it is shut off by a partition from its filament.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell