Floral diagrams

Usama K. Abdelhameed

এই এপ্‌টোৰ বিষয়ে

The main axis meets a unit in Dicots (ex. In Leguminosae)
The main axis meets space in Monocots
Successive whorls are alternated (ex. In obdiplostemony & antiposed stamens)
How to draw Longitudinal Section (L.S.)
By aid of the flower and the floral diagram
Imagine a line in the middle of the floral diagram, from main axis to the bract., Labels should be on L.S. not on the floral diagram

Vegetative characters:
1. Root system: adventitious.
2. Stem: culm-like.
3. Leaves: linear leaves with parallel venation,
opened sheathing base, ligule,2 auricles.

Floral characters:
1. Spike inflorescence.
2. Trimerous florets.
3. Perianth: may be present or absent, if present it is represented by 2 lodicules.
4. Androecium: 3 stamens, versatile anthers.
5. Gynoecium: superior ovary, 1 carpel, 1 locule, basal placentation, 2 feathery stigma.
Floral formula:

% , , P 2 , A 3 , G 1 , Basal placentation.
0 3+3
3
Floral diagram and L.S.
Vegetative characters:
1. Root system: adventitious.
2. Stem: Angeled.
3. Leaves: Linear with parallel venation, closed sheathing base.
Floral characters:
1. Spike inflorescence.
2. Trimerous florets.
3. Perianth: absent.
4. Androecium: 3 stamens, versatile anthers.
5. Gynoecium: Superior ovary, 3 carpels, 1 locule, basal placentation, 3- feathery stigma.
Floral formula:

% , , P 0 , A 3 , G 3 , Basal placentation.
Floral diagram and L.S.
Vegetative characters:
1. Root system: adventitious fiberous.
2. Stem: Unbranched.
3. Gross morphology: tiller.
4. Leaves: Crown-like with parallel venation.

Floral characters:
1. Spadix inflorescence.
2. Trimerous unisexual flower.
3. Perianth: undifferentiated into calyx nor corolla.
4. Androecium: 6 stamens.
5. Gynoecium: superior ovary, 3 carpels, apocarpous, basal placentation.
Floral formula:
, , P (3)+3 , A 3+3

, , P (3)+3 , G (3) , Basal placentation.
Floral diagram and L.S.
Vegetative characters:
1. Leaves: with parallel venation, ochreate stipules.
2. Root system: adventitious.
Floral characters:
1. Trimerous flower.
2. Perianth: differentiated into calyx and corolla.
3. Androecium: 6 stamens.
4. Gynoecium: Superior ovary, 3 carpels, 3 locules, axile placentation.
Floral formula:
, , K 3 , C 3 , A 3+3 , G (3) , Axile placentation.
Floral diagram and L.S.
Vegetative characters:
1. Leaves: succulent with parallel venation.
2. Root system: adventitious.
Floral characters:
1. Trimerous flower.
2. Perianth: undifferentiated into calyx nor corolla, 6 tepals.
3. Androecium: 6 stamens, introse anthers.
4. Gynoecium: Superior ovary, 3 carpels, 3 locules, axile placentation.
Floral formula:
, , P (3+3) , A 3+3 , G (3) , Axile placentation.
Floral diagram and L.S.
Vegetative characters:
1. Leaves: with parallel coastal venation.
2. Stem: subterranean (rhizome), pseudo-aerial stem.
3. Root system: adventitious.
Floral characters:
1. Spadix inflorescence.
2. Trimerous flower.
3. Perianth: undifferentiated into calyx nor corolla.
4. Androecium: 5 fertile stamens.
5. Gynoecium: Inferior ovary, 3 carpels, 3 locules, axile placentation.
Floral formula:
% , , P (3+2),1 , A 3+2 , G (3) , Axile placentation.
Floral diagram and L.S.
Vegetative characters:
1. Leaves: with parallel venation.
2. Root system: adventitious.
Floral characters:
1. Trimerous flower.
2. Perianth: differentiated into calyx and corolla.
3. Androecium: 6 stamens, only 1 anther lobe fertile, the others metamorphosed into petals.
4. Gynoecium: Inferior ovary, 3 carpels, 3 locules, axile placentation, petaloid style.
Floral formula:
% , , K 3 , C 3 , A 1/2 , G (3) , Axile placentation.