Artificial Group Floriferae Polypetalae Subclass Rosidae Rosaceae (Rose Family)

100 Genera (4 on campus)

3,100 species
I. Leaves - very variable

A. Deciduous -> Evergreen

B. Alternate -> some Opposite

C. Simple -> Compound

D. Stipulate -> Estipulate
II. Flowers

A. Perfect

B. Actinomorphic (regular)

C. 5-merous

D. Perigenous or Hypogenous
III. Fruit

A. Pome, Drupe, Capsule, Follicle, Achene

A. Relatively unimportant to lumber industry

except Prunus serotina (Cherry) wood

B. Extremely important for edible fruits

C. Highly prized ornamentals
V. Range

A. Worldwide, most numerous in temperate latitudes

A. Prunoideae = Drupe fruits

B. Pomoideae = Pome fruits

Prunoideae

[Latin name for plum]

conspicuous glands on petioles

B. 1 seeded Drupe
C. P. serotina (Wild, Black Cherry) (OT,)

1. Reddish pubescence on midrib

2. < 2 cm petioles
D. P. avium (Sweet, Mazzard Cherry)

1. Glabrous midrib

2. > 2 cm petioles
E. Genus also includes Peach, Almond, Apricot
Pomoideae
I. Malus (Apple)

[Latin for apple]

1. Whitish pubescence on underside of leaf,

petioles, buds, & twigs
B. M. coronaria (Pyrus coronaria in Blackwell)

(Wild sweet crabapple)

1. Leaf, petioles, buds, & twigs essentially

glabrous

[Latin for pear]

1. Leaves, petioles, buds, & twigs sparsely

pubescent
III. Sorbus (Mountain Ash)

[Latin name]

1. Odd pinnately compound leaves with

13-17 serrate leaflets

2. Clusters of red pomes

B. Small Tree / Shrub

C. Thorns, except in some horticultural varieties

D. C. phaenopyrum (Washington Hawthorn)

1. Lustrous, 3-lobed, serrate leaf

2. Veins extend to sinuses and lobe tips

3. Branched Thorns

E. C. crus-galli ((Cockspur thorn)

1. Leathery, obovate leaf with wedge shaped base

2. Veins extend to tips of teeth only

3. Lots of unbranched thornsArtificial Group Floriferae Polypetalae Subclass Magnolidae
Lauraceae (Laurel Family)
45 Genera

2,200 species (1 on campus)

A. Deciduous or evergreen

B. Alternate

C. Simple

D. Estipulate

E. Usually aromatic

A. Perfect or imperfect

B. Regular

C. 3 or 4 whorls of 3 stamens

D. 1 1-celled pistil with single ovule
III. Fruit

A. 1-seeded berry or drupe

A. Aromatic substances from leaves, stems, bark

roots, and fruits used in perfumes and

flavoring

1. Cinnamomum camphora -> camphor

2. Cinnamomum zeylanicum -> cinnamon

3. Laurus nobilis -> bay leaves

4. Sassafras albidum -> oil of sassafras

used in soaps & flavorings

-> young leaves used a mucilaginous

thickening and flavor in Creole dishes

-> root bark used to make tea

B. Persea americana - edible avocado

C. Lumber

1. Endiandra palmerstoni (E. Australia)

substitute for Juglans nigra lumber

2. Ocotea rodiaei (British Guiana)

lumber used in marine construction

3. Sassafras albidum (eastern USA)

substitute for Fraxinus nigra

A. Mostly tropical

Sassafras albidum (OT,)

A. Three leaf forms on same tree

Entire, Mitten Shaped, 3-Lobed

B. Green twigs

C. Dioecious

D. Blue Drupe

E. Deeply furrowed, reddish brown, spicy,

aromatic bark