1500 species (1 on campus) (Amur Corktree introduced from Mongolia see #26 on western campus walk)




Дата канвертавання26.04.2016
Памер10.94 Kb.
Rutaceae (Rue Family)

150 Genera

1500 species (1 on campus) (Amur Corktree - introduced from Mongolia – see #26 on western campus walk)
I. Leaves

A. Alternate, some opposite

B. Compound, some simple

C. Estipulate

D. Glandular-punctate dots on leaflets

E. Aromatic, bitter, volatile oil


II. Flowers

A. Regular

B. Perfect or imperfect

C. 4-5 sepals & petals

D. 8-10 stamens

E. 1 pistil


III. Fruits

A. Drupe, follicle, samara, hesperidium


IV. Economic importance

A. Citrus has edible fruit

(orange, tangerine, lemon, lime, grapefruit)

B. Tropical general - lumber for structural timber

& cabinets
V. Range

A. World wide


Phellodendron amurense (Amur corktree)

[Grk = "cork tree"]


A. Lateral buds hidden by petiole base

B. No terminal buds

C. Black drupe

D. Deeply furrowed bark with corky ridges


Simaroubaceae (Quassa, Bitterwood Family)
25 Genera (1 on campus)

150 species


I. Leaves

A. Alternate

B. Pinnately compound or simple

C. Stipulate or estipulate


II. Flowers

A. Regular

B. Imperfect polygamous or dioecious

C. small in large showy panicles


III. Fruits

A. Capsule, drupe, berry, samara


IV. Economic Importance

A. Water soluble bitter compound used in insecticides

& medicine
V. Range

A. Tropical & Subtropical


VI. Ailanthus altissima (Tree of heaven, Stink Tree)

[Reaching to the heaven-G, tall-se]


A. 30-60 cm pinnately compound leaves

B. leaflets smell bad, have 1-5 round teeth with apical

glands at base

C. Cream to reddish brown twisted samaras in large clusters

D. Introduced from E. Asia, now naturalized in disturbed areas

throughout temperate N. America

E. Difficult to eradicate because of numerous seeds & root sprouts, rapid growth "A Tree

Grows in Brooklyn"


Tiliaceae (Linden, Basswood Family)

[Latin name, meaning "wing"]



Usually one exposure will enable students to quickly recognize this family and genera due to the typical tilia leaf: cordate, inequilaeral base, and other characteristics common in this family.
However, determining species is not easy. There is much disagreement among botanists on the numbers and varieties of both large and small leaf tilias.
50 Genera (1 on campus)

450 species


I. Leaves
A. Alternate

B. Simple

C. Stipulate

D. Serrate

E. Inequilateral base
II. Flowers
A. Perfect

B. Regular

C. 5-merous

D. 1, 2- to 10-celled pistil


III. Fruits
A. Capsule, drupe, berry, or nutlike

Tilia has nutlike fruits associated with

distinctive ovate bract
IV. Economic importance
A. Wood

1. Plywood - glues easily

2. Boxes & crates for foodstuff

doesn't smell

3. Concealed parts of furniture

doesn't warp, check

4. Excelsior - shaves easily
B. Soil improvement through high Ca, Mg, P, N, K

content in leaves


C. Nectar source for honey bees
D. Ornamental
V. Range
A. World wide, mostly in tropics

Species Comparison - if you're looking for a taxonomy project,

have I got the genus for you!
I. Tilia americana {T. glabra} (American basswood)
A. 10-15 cm long broadly ovate leaves

B. Axillary tufts of hair


II. T. tomentosa {T. argentea, T. alba,

T. americana var. heterophylla}

(White, Silver Basswood, Beetree)
A. 7.5-11.5 cm long orbicular leaves

B. White/tan stellate tomentose underside of leaf


III. T. cordata {T. ulmifolia, T. parvilolia, T. europea}

[small flowered]

(Small Leaved Linden)
A. 3.7-7.25 cm long orbicular leaves

B. Dark green above

C. Dark blue/green below

D. Glaucous & glabrous with axillary tufts of brown hair

E. Fruit with fragile shell
IV. T. platyphyllos {T. grandifolia, T. europea}

[broad leaved]

(Large Leaved Lime)
A. 7.5-10 cm long orbicular-ovate leaves

B. Dull green above

C. light green below

D. lightly pubescent with axillary tufts

E. Fruit with thick shell
IV. T. europaea -> hybrid T. cordata X T. platyphyllos

(European Linden)


A. 5-10 cm long broadly ovate leaves

B. Dark green above

C. Bright green below

D. Glabrous with axillary tufts of hair

E. Fruit with thick shell
V. T. euchlora -> hybrid T. dasystyla X probably T. cordata

(Crimean Linden)


A. 5-10 cm long broadly ovate leaves

B. Shiny pale green above

C. Pale green below

D. Glabrous with axillary tufts of brown hair



E. Fruit with thick shell


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