1 / 7

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

idola-swanson
Télécharger la présentation

Habit shrubs or trees

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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 )

More Related