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Habit shrubs or trees

Rosidae II. Aceraceae -- the maple family (2/120; Mostly New and Old World temperates, plus tropics of s.e. Asia). Habit shrubs or trees Leaves palmately-veined, simple or palmately or pinnately compound leaves, opposite ; estipulate

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Habit shrubs or trees

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  1. Rosidae II Aceraceae -- the maple family(2/120; Mostly New and Old World temperates, plus tropics of s.e. Asia) • Habit shrubs or trees • Leaves palmately-veined, simple or palmately or pinnately compound leaves, opposite; estipulate • Inflorescence panicle, raceme, corymb, or umbel-like axillary cluster • Special floral characters:nectary disc,carpels winged • Calyx 5 (4, 6-9) sepals, distinct or basally connate • Corolla 5 (0, 4, 6-9) petals, distinct • Androecium 8 (4-12) stamens, distinct • Gynoecium 2 (3+) carpels, connate, winged; superior; 2 styles or 1 style deeply divided • Fruit= samaroid schizocarp with 1 seed maturing per locule • (Floral formula: Ca 5 Co 5 A 8 G 2 )

  2. Rosidae II Aceraceae -- comments The genera:Acer (maple) is common to both the Old and New Worlds. The other, Dipteronia, occurs only in China. Notes:Acer is the source of maple syrup and many species are valuable timber trees and their wood are used to make furniture. Also used as street and other landscaping trees/shrubs. In the field, the opposite, palmately-veined, simple leaves (except things like A. negundo), opposite branching, and the two-winged samaroid schizocarps should diagnose the family.

  3. b-familyRosidae II Anacardiaceae -- the sumac family (75/600; predominately tropical, extends up into the temperate zones of North America and Eurasia) • Habit shrubs, trees, woody vines • Leaves simple to pinnate to trifoliolate, alternate; estipulate • Inflorescence panicle • Special floral characters:nectary disc, hypanthium sometimes present, flowers often imperfect, resinous compounds or volatile substances with strong odor in stems and leaves • Calyx 5 (3-7) sepals, connate • Corolla 5 (3-7) petals, distinct • Androecium 5-10 (1, many) stamens, distinct or weakly connate at base • Gynoecium 3 (2-12) carpels, connate; superior; 3 (1 or 4-5) styles, distinct • Fruit= drupe or berry • (Floral formula: Ca 5 Co 5 A 5-10 G 3 )

  4. b-familyRosidae II Vitaceae --the grape family (11-14/700; Mostly tropical and subtropical with a few widespread temperate spp.) • Habitwoody vines with tendrils, less common as shrubs, trees • Leaves simple and palmately lobed or veined, or pinnately or palmately compound, alternate; estipulate or stipulate • Inflorescence cymose, variable • Special floral characters:nectary disc • Calyx 4-5 (3-7) sepals, connate • Corolla 4-5 (3-7, 0) petals, distinct (connate) or apically coherent • Androecium 4-5 (3-7) stamens, distinct or anthers connate; opposite petals • Gynoecium 2 (3-6) carpels, connate; superior; 1 style or sessile stigma • Fruit= berry • (Floral formula: Ca 4-5 Co 4-5 A 4-5 G 2 )

  5. Rosidae II Rutaceae -- the citrus family (150+/900-1500; cosmopolitan tropical and temperate) • Habit shrubs or trees • Leaves simple to pinnately compound, alternate; estipulate; vegetation usually punctate with oil glands and often strongly scented • Inflorescence various • Special floral characters:nectary disc,punctate glands often present (even in flowers) • Calyx 4-5 (2-3) sepals, ± connate • Corolla 4-5 petals, distinct (connate) • Androecium 4-10 stamens, distinct • Gynoecium 2-5 (1, many) carpels, connate; superior; 1 style • Fruit= capsule, berry, hesperidium, samara, schizocarp, or cluster of follicles • (Floral formula: Ca 4-5 Co 4-5 A 4-10 G 4-5 )

  6. Rosidae II Euphorbiaceae -- the spurge family (320/7500; pan tropical, poorly represented in temperate areas) • Habit herbs, shrubs, trees, stem succulents often with milky sap • Leaves simple, alternate or opposite; stipulate • Inflorescence various, sometimes very condensed forming a cyathium • Special floral characters:imperfect flowers, typically apetalous, • Calyx 4-5 (0) sepals, distinct or ± connate • Corolla 0 (4-5) petals, distinct or basally connate; can be adnate to stamens • Androecium 1-many stamens, distinct or variously connate • Gynoecium3 (1-20) carpels, connate; superior; 3 (1-20) styles often forked • Fruit=schizocarpic capsule (rarely a drupe, berry, pod, or samara) • (Floral formula: Ca4-5 (0) Co 0 (4-5) A 0 G 3 // Ca4-5 (0) Co 0 (4-5) A 1-many G 0 )

  7. Rosidae II Apiaceae (Umbelliferae) -- the carrot family (428/3000; cosmopolitan, greatest diversity in north temperate zone) • Habit herbs (rarely shrubs or trees) • Leaves simple to variously lobed or compound, alternate; estipulate with petioles sheathing; with internal oil glands and often strongly scented • Inflorescencecompound umbels (rarely simple umbels, heads, or axillary) • Special floral characters: small flowers, sepals may be highly reduced • Calyx 5 sepals, distinct • Corolla 5 (0) petals, distinct • Androecium 5 stamens, distinct, alternate to petals • Gynoecium 2 carpels, connate; inferior; 2 styles often subtended by bulging stylopodia • Fruit= schizocarp with 2 mericarps, often strongly ribbed, sometimes winged, samaraoid or covered with tubercles or prickles • (Floral formula: Ca 5 (0) Co 5 A 5 G 2 )

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