DICOTYLEDONS.

Polypetalae:
Thalamiflorae.
Disciflorae.
Calyciflorae.

Gamopetalae:
Inferae.
Heteromerae.
Bicarpellatae.

Monochlamydeae in eight series.
Monocotyledons in seven series.

Of the Polypetalae, series 1, Thalamiflorae, is characterized by
hypogynous petals and stamens, and contains 34 orders distributed in 6
larger groups or cohorts. Series 2, Disciflorae, takes its name from
a development of the floral axis which forms a ring or cushion at the
base of the ovary or is broken up into glands; the ovary is superior.
It contains 23 orders in 4 cohorts. Series 3, Calyciflorae, has petals
and stamens perigynous, or sometimes superior. It contains 27 orders
in 5 cohorts.

Of the Gamopetalae, series 1, Inferae, has an interior ovary and
stamens usually as many as the corolla-lobes. It contains 9 orders
in 3 cohorts. Series 2, Heteromerae, has generally a superior ovary,
stamens as many as the corolla-lobes or more, and more than two
carpels. It contains 12 orders in 3 cohorts. Series 3, Bicarpellatae,