Part 19

Dicotyledons

(Leaves with netted veins. Parts of flower generally in fours or fives or multiples of four or five)

I. Flowers with both calyx and corolla.

A. Corolla composed of free and separate petals.

1. Stamens attached to base of flower, beneath the pistil--Orders 1-22.

2. Stamens attached above or around the pistil--Orders 23-36.

B. Corolla of united petals.

1. Ovary inferior.

a. Stamens on the corolla--Orders 37-41.

b. Stamens on the ovary--Orders 42-43.

2. Ovary superior.

a. Stamens free from the corolla--Order 44.

b. Stamens on the corolla--Orders 45-59.

II. Flowers with calyx or corolla or both absent.

A. Flowers with corolla absent, and, generally, with stamens and pistil in the same flower.

1. Ovary superior--Orders 60-64.

2. Ovary inferior--Orders 65-67.

B. Corolla and calyx usually absent. Stamens and pistil usually in separate flowers.

1. Flowers not in catkins--Orders 68-71.

2. Flowers in catkins--Orders 72-76.

Monocotyledons

(Leaves usually with parallel veins. Parts of flower in threes or multiples of three)

I. Perianth (see p. 11), coloured or petal-like, not scaly. (Sometimes absent.)

A. Ovary inferior.

1. Leaves with parallel veins--Orders 77-80.

2. Leaves with netted veins--Order 81.

B. Ovary superior--Orders 82-88.

II. Flowers without perianth, enclosed in scales or husks.