Let me show you some results of searching for World Maples

1. The University of Alabama in Huntsville Grounds Management
Home Page/Campus Trees/Deciduous Trees
http://www.uah.edu/admin/Fac/grounds/DECTREES.htm

Here are explanation of maples mentioned below with photos.

Botanical name (Common Name)
Acer buergeranum (Trident Maple)
Acer circinatum (Oregonvine Maple)
Acer cissifolium (Ivyleaf Maple)
Acer davidii (David Maple)
Acer davidii ssp. grosseri (Stripebarked Maple)
Acer ginnala 'Flame' (Amur Maple)
Acer griseum (Paperbark Maple)
Acer palmatum 'Bloodgood' (Japanese Maple cult.)
Acer platanoides (Norway Maple)
Acer rubrum (Red Maple)
Acer rubrum 'October Glory' (Red Maple cult.)
Acer saccharinum (Silver Maple)
Acer saccharum (Sugar Maple)
Acer saccharum 'Commemoration' ('Commemoration'Sugar Maple)
Acer saccharum 'Legacy' (Legacy Sugar Maple)
Acer saccharum var. barbatum (Southern Sugar Maple)
Acer triflorum (Three flower Maple)
Acer truncatum (Purpleblow Maple)

2. Texas A&M University Department of Biology

Vascular Plant Image Gallery
http://www.csdl.tamu.edu/FLORA/imaxxace.htm

Acer grandidentatum - Cultivated, from San Antonio Botanical Garden.
http://www.csdl.tamu.edu/FLORA/mi13/mi13024.jpg (branch in fruit)
Acer grandidentatum - Cultivated, from San Antonio Botanical Garden.
http://www.csdl.tamu.edu/FLORA/mi13/mi13025.jpg (branch)
Acer grandidentatum - Native, from BIGBEND. (Boot Canyon)
http://www.csdl.tamu.edu/FLORA/BigBend/BB0021.jpg
Acer grandidentatum - From BIGBEND. (fall colors)
Acer negundo - Native, from Washington-on-the-Brazos State Park, TX.
http://www.csdl.tamu.edu/FLORA/BigBend/BB0348.jpg (branch)
Acer negundo - Native, from Grimes Co., TX. (branch in fruit)
Acer negundo - Staminate flowers
Acer negundo - Pistillate flowers
Acer palmatum - Cultivated. (whole plant)
Acer platanoides - Native, from Berlin/Germany (flower-close)
Acer platanoides - Native, from Berlin/Germany (branch in flower)
Acer platanoides - Native, from Berlin/Germany (branch in flower)
Acer rubrum - Native, from Navasota Flora. (fruit)
Acer rubrum - Native, from Navasota Flora. (fruit -closeup)
http://www.csdl.tamu.edu/FLORA/fa04/fa04082.jpg
Acer rubrum - Native, from East Texas. (fruits)
http://www.csdl.tamu.edu/FLORA/mi01/mi01020.jpg
Acer rubrum - Native, from East Texas. (branch in fruit)
http://www.csdl.tamu.edu/FLORA/mi02/mi02023.jpg
Acer saccharum - Harvest - northeastern Ohio シロップ
http://www.csdl.tamu.edu/FLORA/hdwimages1/hdw047235.jpg
Acer saccharum - Flowering branch
http://www.csdl.tamu.edu/FLORA/hdwimages1/hdw069719a.jpg
Acer sp. (fruit - winged schizocarp)
http://www.csdl.tamu.edu/FLORA/Veg&Repro/V&R087.jpg

3. Universita di Catania,Dipartimento di Botanica
http://www.dipbot.unict.it/

Acer oblongum
http://www.dipbot.unict.it/orto/0011-1.html

Tavole di ﾊBotanica sistematica
http://www.dipbot.unict.it/sistematica/

Acer obtusatum
http://www.dipbot.unict.it/sistematica/1873_013.html
Acer campestre L. seed
http://www.dipbot.unict.it/sistematica/Acer_fam.html
Acer pseudo-platanus L. flower
http://www.dipbot.unict.it/sistematica/1879_004.html

4. Oregon State University, Landscape Plants Web Site
http://www.orst.edu/dept/ldplants

Here are explanation of maples mentioned below and such photos as a landscape, leaves, seed and the Fall color.

Acer campestre (Hedge Maple)
Acer circinatum (Vine Maple)
Acer ginnala (Amur Maple)
Acer griseum (Paperbark Maple)
Acer japonicum 'Aconitifolium' (Fernleaf Fullmoon Maple)
Acer macrophyllum (Bigleaf Maple)
Acer negundo (Boxelder)
Acer negundo 'Variegatum' (Variegated Boxelder)
Acer palmatum (Japanese Maple)
Acer palmatum 'Bloodgood' (Bloodgood Japanese Maple)
Acer palmatum var. dissectum (Dissected Japanese Maple)
Acer palmatum var.dissectum atropurpureum (Red Dissected Japanese Maple)
Acer palmatum 'Sango Kaku' (Coralbark Japanese Maple)
Acer platanoides (Norway Maple)
Acer platanoides 'Crimson King' (Crimson King Norway Maple)
Acer platanoides 'Globosom' (Globe Norway Maple)
Acer pseudoplatanus (Planetree Maple, Sycamore Maple)
Acer pseudoplatanus 'Atropurpureum'
(Purpleleaf Planetree Maple, Purpleleaf Sycamore Maple)
Acer rubrum (Red Maple)
Acer saccharinum (Silver Maple)
Acer saccharinum 'Laciniatum' (Cutleaf Silver Maple)
Acer saccharum (Sugar Maple)
Acer saccharum 'Sentry' (Sentry Sugar Maple)
Acer saccharum 'Sweet Shadow' (Sweet Shadow Sugar Maple)

5. IDAHO STATE UNIVERSITY
http://www.isu.edu/

Treewalk Page 3 - Rocky Mountain Maple Acer glabrum.
http://www.isu.edu/isutour/treewalk/treewalk3.html
http://www.isu.edu/pics/treewalk/rockymtn-maple2.gif
http://www.isu.edu/pics/treewalk/rockymtn-maple1.gif

6. NOS Society : JOIN THE ACER STUDY STUDY

http://members.tripod.com/~Hatch_L/acerchek.html
E-mail : newplants@angelfire.com

7. Related informations

Seed

Sheffield's Seed Co., / Seed List

Veneers

Freeman Corporation,Pictorial List of Veneers
http://www.freemancorp.com/

MAPLE, BIRDSEYE
http://www.freemancorp.com/veneers/maplebir.html
MAPLE, CURLY (Acer saccharum)
http://www.freemancorp.com/veneers/maplecur.html
MAPLE (Acer macrophyllum)Type: Burl
http://www.freemancorp.com/veneers/mapleburl.html