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Rosids: Fabids Spring 2012.

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Presentation on theme: "Rosids: Fabids Spring 2012."— Presentation transcript:

1 Rosids: Fabids Spring 2012

2 Fig. 8.1

3 Rosids – Major Points Comprise about 25% of all angiosperms
Includes two main clades: fabids and malvids Main support for monophyly from molecular data No clear morphological synapomorphies, but tendencies to have perianths with unfused parts and a stamen merosity > calyx or corolla, although there are many exceptions Extreme variation in habit (trees, shrubs, herbs, vines, etc.) as well as extensive proliferation of floral syndromes, including wind, insect, bird, and bat pollination Transition from apocarpy to syncarpy as seen before; fusion and embellishment of floral parts

4 Fig. 8.30

5 Core Eudicots: The Rosids
Fabids: Order Malpighiales Order Fabales Order Rosales Order Cucurbitales Order Fagales Malvids: Order Myrtales Order Brassicales Order Malvales Order Sapindales

6 Core Eudicots: The Rosids - Fabids
Order Malpighiales Euphorbiaceae* – Spurges Salicaceae* – Willows and poplars Violaceae – Violets Order Fabales Fabaceae* – Beans Order Rosales Rosaceae* – Roses Moraceae – Figs, mulberries Ulmaceae – Elms Order Cucurbitales Curcurbitaceae* – Cucumbers, squashes Begoniaceae – Begonias Order Fagales Betulaceae – Birches Fagaceae – Oaks, beeches, chestnuts Juglandaceae – Walnuts, hickories *Family required for recognition

7 Rosids-Fabids: Malpighiales: Euphorbiaceae (The Spurge Family)
Widespread, but most diverse in tropical regions Trees, shrubs, herbs, or vines, sometimes succulent; leaves usually alternate Diversity: ca. 6,300 species in genera Flowers: Unisexual; sepals 2-6; petals 0-5; carpels usually 3, ovule 1 per locule; styles usually 3 and sometimes divided; inflorescences often highly modified; fruit a schizocarp, seeds usually arillate Significant features: Often with latex/laticifers (toxic) Special uses: rubber (Hevea), cassava/manioc (Manihot), poinsettia (Euphorbia), ornamentals Required taxa: Euphorbia

8 Euphorbiaceae: Euphorbia
Ca. 2,400 species White latex (usually) One female and few to many male flowers aggregated into a cyathium (one type of false flower or pseudanthium) Cyathium subtended by modified leaves (cyathophylls)

9 Euphorbiaceae: Euphorbia cyathium
From the Euphorbia PBI website

10 Euphorbiaceae: Euphorbia
Digital Flowers

11 castor bean ~ poisonous seeds
Euphorbiaceae Castor oil plant (Ricinus communis) castor bean ~ poisonous seeds ^

12 Euphorbiaceae Rubber (Hevea brasiliensis) ^

13 Euphorbiaceae ^ Tapioca, Cassava (Manihot) Manihot esculenta
cassava, tapioca ^

14 Euphorbiaceae Tung oil (Aleurites) Aleurites fordii tung-oil tree ^

15 Rosids-Fabids: Malpighiales: Salicaceae (The Willow or Poplar Family)
Widespread, from tropical to north temperate and boreal regions Trees or shrubs Diversity: 1,200 species in genera Flowers: bisexual or unisexual; sepals 3-8; petals 3-8; stamens 2-∞; carpels 2-4, connate, in superior ovary; fruit variable Significant features: leaves simple, often with salicoid teeth; salicin in most; includes what was formerly called the “Flacourtiaceae” Special uses: lumber, shade trees, ornamentals Required taxa: Populus, Salix

16 Salicaceae: Salix -bud scale single -catkins usually erect
or ascending -flowers unisexual -each flower with 1-4 basal nectar glands -stamens 1-12 -mainly insect pollination

17 Salicaceae: Populus -bud scales several, overlapping
-catkins arching or drooping -flowers unisexual -each flower with a basal cup-like disk -stamens 8-numerous -wind-pollination

18 Rosids-Fabids: Malpighiales: Violaceae (The Violet Family)
Widespread, but predominantly herbs of temperate regions Herbs, shrubs, or trees Diversity: species in genera Flowers: Sepals 5; petals 5; 5 connivent stamens; carpels usually 3, connate, superior ovary; fruit usually a loculicidal capsule Significant features: Zygomorphy, nectar spurs; floral cleistogamy Special uses: Violets grown primarily as ornamentals Family not required

19 Violaceae: connivent stamens

20 Violaceae: Viola -mostly herbs, some shrubs -flowers zygomorphic
-lower petal spurred -spring flowers open-pollinated, summer flowers remaining closed (cleistogamous)

21 Rosids-Fabids: Fabales: Fabaceae (The Legume Family)
Nearly cosmopolitan Herbs, vines, trees, shrubs with usually alternate, stipulate, pinnately to palmately compound leaves (sometimes unifoliolate or simple) Diversity: 19,500 species, genera – THIRD LARGEST FAMILY of angiosperms Flowers: a short, cup-like hypanthium present; sepals & petals usually 5, free or connate; petals all alike or the uppermost 1 differentiated (banner), the lower 2 forming a keel or flaring apart; stamens 5 or 10-many, if connate then monadelphous or diadelphous; carpel 1, on a short stalk (gynophore); fruit is a legume (Duh!) but sometimes modified Significant features: High nitrogen metabolism w/ unusual amino acids, often with root nodules with N-fixing bacteria; leaf and leaflet pulvinuses well developed; endosperm often lacking; wide range of floral diversity; 3 subfamilies but 1 is not monophyletic Special uses: Many!! Beans, peas, peanuts, soybean, clover, ornamentals (Mimosa, Bauhinia); lumber, dyes, resins Required taxa: Glycine, Trifolium, Mimosa, Cercis, Gleditsia and the three subfamilies

22 Fabaceae vegetative characters
root nodules pulvinus compound leaves

23 Fabaceae floral characters
Diadelphous stamens: 9 + 1 Perigynous flower, short hypanthium gynophore Marginal (parietal) placentation

24 Fabaceae fruit and seed characters
non-endospermous seeds legumes, loments, etc.

25 Mimosoideae “Caesalpinioideae” Papilionoideae Leaves pinnately
Leaves usually twice pinnately compound Fls actinomorphic, petals valvate, distinct or basally fused Stamens 10-many, “Caesalpinioideae” Leaves usually pinnately or twice pinnately compound Fls + weakly zygomorphic, upper petal usually innermost; petals distinct Stamens 5 or 10, distinct Papilionoideae Leaves pinnately compound to trifoliolate Fls zygomorphic, upper petal (banner) outermost; well defined wings and keel Stamens 10, monadelphous or diadelphous

26 Fabaceae – Subfamily Mimosoideae
Albizia julibrissin Acacia sp.

27 Fabaceae: Mimosoideae
Actinomorphic tubular flowers in heads many stamens, not fused Albizia julibrissin mimosa, silktree

28 Fabaceae: Mimosoideae: Mimosa
-woody or herbaceous -often armed (with prickles) -leafstalk without glands -flowers in heads or rarely racemes or spikes -stamens 10 or fewer

29 Fabaceae – Subfamily “Caesalpinioideae”

30 Fabaceae: “Caesalpinioideae”
zygomorphic flower pulvinus Stamens not fused -10 or fewer Senna obtusifolia sicklepod

31 Fabaceae: “Caesalpinioideae”: Cercis
-unarmed -leaves simple, palmately veined -flowers clustered, appearing before leaves -corolla rose to pink-purple Cercis canadensis - redbud

32 Fabaceae: “Caesalpinioideae”: Gleditsia
-armed (with thorns) -leaves 1- or 2-pinnate -flowers small, unisexual or bisexual -staminate inflorescences catkin-like, pendent -fertile inflorescences with bisexual or carpellate flowers Honey locust

33 Fabaceae – Subfamily Faboideae

34 Fabaceae: Faboideae Petals unequal: banner wings keel
monadelphous stamens Crotalaria spectabilis showy rattlebox bacterial root nodule

35 Crotalaria spectabilis
Fabaceae: Faboideae Petals unequal: banner wings keel Crotalaria spectabilis showy rattlebox

36 Fabaceae: Faboideae Lathyrus sweet-pea Digital Flowers

37 Fabaceae: Faboideae: Glycine
-leaves pinnately 3-foliolate -inflorescence a raceme -stamens diadelphous -seeds few per pod

38 Fabaceae: Faboideae: Trifolium
-leaves palmately (or pinnately) foliolate with usually 3 leaflets -inflorescences racemose but often appearing head-like -stamens diadelphous -fruits enclosed by the persistent corolla -seeds 1-6 per pod

39 Rosids-Fabids: Rosales: Rosaceae (The Rose Family)
Cosmopolitan, primarily in the Northern Hemisphere Herbs, shrubs or trees (75% woody plants) Diversity: 2,500-3,000 species in genera Flowers: Showy, actinomorphic, hypanthium present; sepals 5; petals 5; stamens usually numerous; carpels 1 to many, apocarpous or syncarpous; ovary superior or inferior; fruit can be a follicle, achene, pome, drupe, or associated with expanded receptacle Significant features: Wide range of fruit evolution within family; leaves alternate, stipules present Special uses: Fruits (apples, pears, berries), ornamental herbs, trees, and shrubs; lumber, perfumery Required taxa: Rubus, Prunus

40 Rosaceae: Rosa -shrubs, often prickly -leaves pinnately compound
-ovary superior -hypanthium + globose and fleshy, contracted at the mouth -carpels numerous -fruit an achene

41 Rosaceae: Rubus* -herbaceous to shrubby, usually with prickles
-leaves often compound with 3 to 7 leaflets -carpels usually numerous, borne on an elongate receptacle -fruit a drupelet, forming an aggregate fruit (blackberries and raspberries) *required for recognition

42 Rosaceae: Prunus* -trees or shrubs -bark with prominent
horizontal lenticels -ovary superior -carpel solitary -fruit a drupe, endocarp stony *required for recognition

43 Rosaceae: Malus -trees with simple leaves -ovary inferior, with
5 carpels -mature carpels papery or softly leathery -fruit a pome, lacks stone cells

44 Rosids-Fabids: Rosales: Moraceae (The Fig Family)
Widespread, from tropical to temperate regions Trees, shrubs, or vines (sometimes herbs) Diversity: 1,500 species in 53 genera Flowers: Unisexual, inconspicuous; tepals 0-4 or 5 (-8); carpels usually 2, connate, superior ovary; inflorescences cymose, highly modified, compact, receptacle expanded; fruit is a drupe, often in a multiple fruit structure (syconium). Significant features: laticifers/latex throughout the plant Special uses: figs (Ficus), mulberries (Morus), breadfruit (Artocarpus), ornamentals, e.g. osage orange (Maclura) Family not required

45 Moraceae Dorstenia Ficus carica – Cultivated Fig Artocarpus
(breadfruit) Maclura pomifera Osage orange Morus rubra - Mulberry

46 Moraceae: Ficus -shrubs or trees -connate stipules enclosing
the terminal buds -leaves with entire margins -flowers minute, borne inside the syconium -wasp-pollinated

47 Moraceae – The Fig and The Fig Wasp

48 Rosids-Fabids: Rosales: Ulmaceae (The Elm Family)
Widely distributed; maximal diversity in temperate regions of N. Hemisphere Trees with alternate, 2-ranked leaves Diversity: 35 species in 6 genera Flowers: Small, inconspicuous; tepals 4-9; stamens 4-9; carpels 2, connate, superior ovary; fruit a samara or nutlet, seeds flat Significant features: Leaves simple with pinnate venation, margins simply or doubly serrate, blade base asymmetrical; endosperm of a single layer Special uses: Elms provide lumber; some trees used as ornamentals Family not required

49 Ulmaceae: Ulmus

50 Rosids-Fabids: Cucurbitales: Cucurbitaceae (The Cucumber or Squash Family)
Widespread in the tropics and subtropics, a few in temperate regions Herbaceous or soft woody vines with scabrous stems and palmately veined/lobed leaves and usually with tendrils Diversity: 900 species in genera Flowers: hypanthium present; sepals & petals 5, usually connate; stamens 3-5; carpels usually 3; ovary half-inferior or inferior; fruit usually a berry (with hardened rind a pepo); seeds flattened, the seed coat with several layers Significant features: wide range of floral diversity, “toothed” leaves lacking stipules; female flowers epiperigynous Special uses: cucumbers (Cucumis), pumpkins, gourds, and squashes (Cucurbita), watermelons (Citrullus) etc. are eaten for fruits and seeds; Luffa, some ornamentals Required taxa: family only

51 Cucurbitaceae: Cucurbita
-trailing herbs -leaves large, cordate- angled or lobed -flowers large, solitary in axils -corolla campanulate, deeply 5-lobed -ovaries and fruits smooth or hairy, not prickly -fruits large, with a firm rind -gourds, squashes, pumpkin

52 Rosids-Fabids: Cucurbitales: Begoniaceae (The Begonia Family)
Widely distributed in the tropics and subtropics Herbs or soft woody shrubs Diversity: ca. 1,400 species in 2 genera (all but one species in Begonia) Flowers: Unisexual; tepals petaloid, 2-10 but usually 4 in 2 whorls (staminate) and 5 in 1 whorl (pistillate); carpels usually 3, connate; inferior ovary; fruit a loculicidal capsule, usually winged Significant features: Soft herbs, typically of shaded habitats; stigmas elongated, twisted, yellow, papillose Special uses: primarily ornamentals Family not required

53 Begoniaceae: Begonia -winged ovaries Carpellate Flowers
Staminate Flowers -winged ovaries

54 Rosids-Fabids: Fagales: Fagaceae (The Oak and Beech Family)
Widespread, in tropical to temperate regions of the Northern Hemisphere Trees and shrubs Diversity: species in 7 genera Flowers: Unisexual (monoecious); tepals usually 6 and reduced, inconspicuous; stamens 4-many; carpels 3 (-12), connate, inferior ovary; fruit a nut, associated with a spiny or scaly cupule Significant features: Male inflorescences in dangling catkins; female inflorescences in sessile clusters Special uses: edible nuts (chestnuts), lumber, tannin, cork; ornamental trees Family not required

55 Fagaceae: Quercus Bark pale to dark but scaly or furrowed
Buds clustered at twig tips, ovate Leaves lobed or unlobed Male flowers in drooping catkins Cupule saucer-like or cup-shaped Nut circular in cross-section

56 Fagaceae: Fagus Bark light gray, smooth
Buds solitary at twig tips, slender and acute Leaves unlobed, strongly straight-veined Male flowers in a rounded head Cupule with 4 valves Nut compressed or triangular

57 Rosids-Fabids: Fagales: Betulaceae (The Birch Family)
Widespread, in temperate to boreal regions, primarily of the northern hemisphere Trees or shrubs; leaves doubly serrate Diversity: 140 species in 6 genera Flowers: Unisexual (monoecious); tepals (0-) 1-4 (-6), highly reduced; stamens 1-4; carpels 2, connate, inferior ovary; fruit an achene, nut or 2-winged samara Significant features: Flowers in erect (female) or pendant (male) catkins (aments); staminate and carpellate flowers in separate inflorescences Special uses: hazel nuts edible; lumber, shade trees, ornamentals Family not required

58 Betulaceae: Betula Outer bark often separating in thin sheets
Carpellate and staminate flowers both in bracteate catkins Carpellate catkins ovoid to cylindrical, with 2-3 flowers per bract and the bracts papery (bracteate dichasia) Staminate flowers 3 per bract; stamens 2, bifid

59 Rosids-Fabids: Fagales: Juglandaceae (The Walnut and Hickory Family)
Widespread from tropical to temperate regions Aromatic trees; leaves pinnately compound or trifoliolate, usually alternate and spiral Diversity: 59 species in 8 genera Flowers: Unisexual (monoecious or dioecious); tepals 0-4, inconspicuous; stamens 3-many; carpels usually 2, connate, ovary inferior; fruit a nut or nutlet Significant features: Fruit often associated with bracts or bracteoles that form an outer “husk” Special uses: fruits of hickories (Carya) and walnuts (Juglans) are eaten; walnut and hickory are valued for their lumber; some ornamentals Family not required

60 Juglandaceae: Juglans
Twigs with chambered pith Leaflets all about the same or the median ones largest Staminate catkins sessile, solitary Nut with an indehiscent, usually rough or furrowed husk

61 Juglandaceae: Carya Twigs with solid pith Apical leaflets largest
Staminate catkins sessile or pedunculate, in clusters Nut with a dehiscent or partially dehiscent, often smooth husk

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