phylogeny of angiospermscourses.washington.edu/bot113/summer/2008/lecturenotes/lecture… ·...
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Amborel
laNym
phaea
lesAust
robail
eyale
s
“Basal angiosperm”
Magno
liidss
Mon
ocots
Eudico
ts
After Jansen et al., 2007, Proc. Natl. Acad. Sci. USA 104: 19369-19374
Parallel venation
scattered vascularbundles
1 cotyledonTricolpate pollen
Angiosperm
Phylogeny of angiosperms
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Phylogeny of monocots
Graham et al., 2006, Aliso 22:3-20
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Typhaceae (Cattail family)
Photo: Hannah Marx Photo: Hannah Marx
Typha latifolia Typha angustifolia
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Typhaceae (Cattail family)
Typhaceae - 1 genus/13 species.Note: different from your textbook treatment, we are not including Sparganium into this family.
Herbs, aquatic or wetland;
Leaves simple, linear (sword-shaped), and entire;
Infloresence a dense spike (with numerous densely clustered flowers in cylindrical cluster), male flowers positioned above the female flowers;
Flowers unisexual (plants monoecious);
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Poaceae/Gramineae (Grass family)
Oryza sativaRef.2
Textbook DVD KRR
Triticum aestivum
Ref.3
Zea maysTextbook DVD KRR
Sorghum vulgare
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Poaceae/Gramineae (Grass family)
Poaceae (or Gramineae) - 650 genera/9,700 species.Note: Alternate family names with an -ae ending are permitted by the International Code ofBotanical Nomenclature for a few families.
One of the largest plant families;
The grass family is THE economically most important family of plants,containing all of the cereal grains: wheat, rice, maize, barley, sorghum,millet, rye, oats, etc.
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Herbs, though bamboo achieves tree-like size (but no true secondary growth in monocots, so no true wood).
Stems jointed, round and usually hollow;
Leaves consist of sheath, ligule, and blade; sheath open, ligule present at junction of sheath and blade.
Infloresence a spikelet of many small flowers; each spikelet subtended by two empty bracts called glumes; each individual flower (floret) enclosed bytwo bracts: the lemma (bract at base of individual floret) and the palea (bract that faces the lemma thereby enclosing the floret).
Florets with very reduced perianth (lodicules); little more than swollen bit of tissue; stamen 1-3;
Fruit a single-seeded caryopsis (grain) with fruit wall fused to the seed;
Growth by intercalary meristem, which is at nodes rather than at tip of stem; Thisallows regeneration when tip is cut, as in grazing or mowing of prairies/lawns;
Poaceae/Gramineae (Grass family)
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Poaceae/Gramineae (Grass family)
Bromus tectorum;Leaf with sheath, blade, and ligule;
Bambusa ventricosa;Stem jointed;
Textbook DVD WSJTextbook DVD JRA
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Poaceae/Gramineae (Grass family)
Textbook DVD KRR
Avena sativa;Spikelets and glumes;
Textbook DVD KMN
Paspalum notatum;Spikelets and stamens;
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Poaceae/Gramineae (Grass family)
Ref.4 Detailed structure of Spikelets and florets;
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Cyperaceae (Sedge family)
Cyperus papyrus
Ancient Egyptiansused this species formaking paper
Ref.1
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Juncaceae - 104 genera/4,500 species. One of the most important families ofwetland plants; the genus Carex contains about 2,000 spp. worldwide, >500spp. in N. America.
Herbs, aquatic or terrestrial;
Stems triangular, solid or hollow;
Leaves with sheath and blade, sheath closed;
Inflorescence a spikelet of many small flowers, with one empty bract at thebase of each spikelet;
Flowers are inconspicuous, each flower subtended by a bract, bisexual orunisexual (then usually monoecious), usually 3 stamens, sometimes only 1 or 2;
Fruit an achene;
In Carex, a perigynium surrounds the ovary;
Cyperaceae (Sedge family)
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Cyperaceae (Sedge family)
Textbook DVD JRA
Scleria triglomerata;
Triangular stem and closed sheath;
Textbook DVD KRR+DLN
Scirpus tabernaemontani;
Spikelet;
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Cyperaceae (Sedge family)
Textbook DVD KRR+DLN
Carex blanda;
Male and female inflorescences;
Carex blanda;
Perigynia (urn-shped or saclike structuresurrounding the female flower of Carex);
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Juncaceae (Rush family) Textbook DVD WSJ Textbook DVD CSC
Juncus dichotomous Luzula multiflora
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Juncaceae - 6 genera/400 species. The major genera are Juncus (300 spp.)and Luzula (80 spp.)
Juncaceae (Rush family)
Herbs, aquatic or terrestrial;
Stems typically round and solid;
Leaves with sheath and blade, sheath usually open;
Flowers are inconspicuous, but when you look carefully, they are just like littlelily flowers, with 6 tepas (or 3 sepals and 3 petals), 3 or 6 stamens;
Fruit capsule;
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Comparison of the three grass-like families
CapsuleAcheneCaryopsisFruit
abscentusually no ligule,but Carex isexception
presentLigule
Round, solidTriangular, solidor hollow
Jointed, round, andusually hollow
Stem
6-tepals or3-sepals+3-petals
Reduced tobristles
Reduced tolodicules
Perianth
JuncaceaeCyperaceaePoaceae
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Ref.1 http://www.hear.org/starr/hiplants/images/600max/html/starr_070221_4773_cyperus_papyrus.Ref.2 http://pictures.nicolas.delerue.org/japan/20030912_riceHarvest/rice_harvest_6745.jpgRef.3 http://www.jacn.org/cgi/content-nw/full/21/suppl_3/161S/F1Ref.4 http://www.mhhe.com/biosci/pae/botany/botany_map/images/0645.jpg