1. Subclass: Rosidae Order: Myrtales Family: Onagraceae
1. Herbaceous.

2. Subclass: Rosidae Order: Myrtales Family: Onagraceae
1. Herbaceous.
2. Bisexual, 4-merous, inferior with a hypanthium present.

4. Subclass: Rosidae Order: Myrtales Family: Onagraceae
1. Herbaceous.
2. Bisexual, 4-merous, inferior with a hypanthium present.
3. One pistil with four carpels; 2-6locules; 4 stamen.

5. Subclass: Rosidae Order: Myrtales Family: Onagraceae
1. Herbaceous.
2. Bisexual, 4-merous, inferior with a hypanthium present.
3. One pistil with four carpels; 2-6 locules; 4 stamen.
4. Placentation axile.
Oenothera “evening primroses”,
Gaura “Gaura”
Epilobium “fireweeds”

7. Subclass: Rosidae Order: Geraniales Family: Oxalidaceae
1. Leaves palmately compound with sour taste; alternate.

8. Subclass: Rosidae Order: Geraniales Family: Oxalidaceae
1. Leaves palmately compound with sour taste; alternate.
2. Flowers bisexual; 5-merous.

9. Subclass: Rosidae Order: Geraniales Family: Oxalidaceae
1. Leaves palmately compound with sour taste; alternate.
2. Flowers bisexual; 5-merous.
3. Stamen (10) united at base - 5 are without anthers.

10. Subclass: Rosidae Order: Geraniales Family: Oxalidaceae
1. Leaves palmately compound with sour taste; alternate.
2. Flowers bisexual; 5-merous.
3. Stamen (10) united at base - 5 are without anthers.
4. Axile placentation; ovary superior.

11. Subclass: Rosidae Order: Geraniales Family: Oxalidaceae
1. Leaves palmately compound with sour taste; alternate.
2. Flowers bisexual; 5-merous.
3. Stamen (10) united at base - 5 are without anthers.
4. Axile placentation; ovary superior.
5. Fruit; a capsule.
Oxalis “wood sorrel”

12. Subclass: Rosidae Order: Myrtales Family: Lythraceae “Loosestrife”
1. Leaves mainly opposite or whorled; simple.
2. Flowers bisexual; perigynous with a spurred hypanthium.

13. Subclass: Rosidae Order: Myrtales Family: Lythraceae
1. Leaves mainly opposite or whorled; simple.
2. Flowers bisexual; perigynous with a spurred hypanthium.
3. Sepals and petals 4 – 8 each, distinct; attached to hypanthium.

15. Subclass: Rosidae Order: Myrtales Family: Lythraceae
1. Leaves mainly opposite or whorled; simple.
2. Flowers bisexual; perigynous with a spurred hypanthium.
3. Sepals and petals 4 – 8 each, distinct; attached to hypanthium.
3. Stamen (8 - 16) in 2 whorls inside hypanthium.
4. Pistil with 2 – 6 carpels; axile placentation.
Lythrum “Loosestrife”

17. Subclass: Rosidae Order: Myrtales Family: Lythraceae
1. Leaves mainly opposite or whorled; simple.
2. Flowers bisexual; perigynous with a spurred hypanthium.
3. Sepals and petals 4 – 8 each, distinct; attached to hypanthium.
3. Stamen (8 - 16) in 2 whorls inside hypanthium.
4. Pistil with 2 – 6 carpels; axile placentation.
5. Fruit - a capsule.
Lythrum “Loosestrife”
L. alatum
L. salicaria

18. Subclass: Rosidae Order: Myrtales Family: Lythraceae
Lythrum “Loosestrife”
L. alatum L. salicaria