Plant Diversity.pdf

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Phylum Cycadophyta: Cycads Slow growing, found in tropics and subtropics Cycads resemble pines, ferns and palms Reproduction Produce cones, have life cycle similar to pines Female cones develop upright among leaf bases Sperm have thousands of spirally arranged flagella Sperm conveyed to archegonium by pollen tube Several species facing extinction Sago palm is used in landscaping
Phylum Gnetophyta: Gnetophytes Closest living relative of angiosperms They sre the only gymnosperms with vessels in their xylem Gnetophytes differ greatly from one another Welwitschia stem shaped like large, shallow cup Tapers into tap root Two strap-shaped, leathery leaves that grow continuously Reproductive structures are cone-like, appear at bases of leaves Produced on separate male and female plants Ephedra comprises more than 35 species Common in arid regions of U.S and Mexico Shrubby plants with jointed stems, scalelike leaves at each node Natural source for drug ephedrine
Page 1: Kingdom Plantae Characteristics chl
Page 6 and 7: Characteristics of nonvascular plan
Page 8: Terms: Sporophyte - a multicellular
Page 11 and 12: Vascular Plants - have vessels (tub
Page 13 and 14: Phylum Pterophyta - the ferns, whis
Page 15 and 16: Whisk Ferns remnants of earliest va
Page 17 and 18: Phylum Lycophyta: Club Mosses World
Page 19 and 20: Gymnosperms comprise 4 phyla Conife
Page 21 and 22: Conifer reproduction: heterosporous
Page 23 and 24: Conifer reproduction: Female cones
Page 28 and 29: Phylum Ginkgophyta: Ginkgo Fossils
Page 30 and 31: Flower structure: modified stems be
Page 32 and 33: Angiosperm life cycle Male gametoph
Page 34: Double fertilization: One sperm nuc
Page 37: Classes of Angiosperms: Class Monoc

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