Subclass: Rosidae (18 Orders; 114 Families; about 58000 Species) The largest subclass in terms of numbers of families

1. Relatively advanced in one or more features (emerged about 110 million years ago; lower cretaceous)
2. Common Traits (Bottom Line = Centripetal stamens and tricolpate pollen)

a. Carpels are mostly syncarpous (a few apocarpus)
b. Flowers ( well developed; polypetalous (rarely apetalous or sympetalous)
c. Stamens ( when numerous are centripetal
d. Pollen is mostly tricolpate; never with only one germ pore.

Other discernment features: see page 151 of the text Common

Representative Families:
 

1. Hydrangeaceae	Hydrangea
2. Grossulariaceae	Gooseberry
3. Crassulaceae	Stonecrop
4. Saxifragaceae	Saxifrage
5. Rosaceae	Rose
6. Mimosaceae	Mimosa
7. Caesalpiniaceae	Caesalpinia
8. Fabaceae	Bean/Pea
9. Lythraceae	Loosestrife
10. Myrtaceae	Myrtle
11. Onagraceae	Evening Primrose
12. Melastomataceae	Melastoma
13. Cornaceae	Dogwood
14. Aquifoliaceae	Holly
15. Euphorbiaceae	Spurge
16. Rhamnaceae	Buckthorn
17. Vitaceae	Grape
18. Linaceae	Flax
19. Polygalaceae	Milkwort
20. Sapindaceae	Soapberry
21. Hippocastanaceae	Buckeye
22. Aceraceae	Maple
23. Anacardiaceae	Cashew
24. Rutaceae	Cirtus
25. Zygophyllaceae	Caltrop
26. Oxalidaceae	Oxalis
27. Geraniaceae	Geranium
28. Araliaceae	Aralia
29. Umbelliferae	Carrot

Common Genera (pp 349-388):
 
 

Mock Orange	Alfalfa	Flax
Hydrangea	Sweet Clover	Candy Flower
Gooseberries	Indigo	Snakeroot
Currants	Black Locust	Vegetable Marrow
Stonecrop	Peanut	Balloon Vine
Jade Plant	Broad Bean	Soapberry
Hens and Chicks	Soybean	Golden Rain Tree
Kalanchoe	Lentil	Horse Chestnut
Life Plant	Kudzu	Buckeye
Saxifrage	Sweet Peas	Box Elder
Astilbe	Peas	Box Elder
Bishop's Cap	Lima Beans	Cashew
Golden Saxifrage	Crepe Myrtle	Sumac
Spirea	Lythrum	Pistachio
Rose	Guava Tree	Rue
Blackberry	Pimento	Kumquat
Cinquefoil	Clove	Lemon, Orange
Strawberry	Primrose Willow	Grapefruit
Pear	Evening Primrose	Creosote Bush
Apple	Fuchsia	Sheep Sorrel
Mountain Ash	Dogwood	Geranium
Fire Thorn	Holly	Pelargonium
Plum, Almond	Bay Tree	English Ivy
Cotoneaster	Spurge	Celery
Quince	Cassava	Carrot
Mesquite	Poinsettiea	Parsley
Mimosa	Croton Oil	Dill
Prickle Weed	Yuca	Lupine
Redbud	Caston Bean	Virginia Creeper
Judas Tree	Jujube	Scotch Broom
Orchid Tree	Boston Ivy	Wine Grapes