no Plant Biology 



10. Phylum Tracheophyta (Tracheata) (tre ke -of i ta) (Gr. tracheia, duct or 

 vessel; phyta, plants) (plants with vascular tissues) 



A. Subphylum Lycopsida (laik -op' si da) (Gr. lykos,\^o\i; opsis, appearance) 



(simple vascular system; small, green leaves) 

 Class Lycopodineae (lai ko po -din' e e) (Gr. lykos, wolf; pous, foot) (club 

 "mosses") (Figs. 47 and 48] 



B. Subphylum Sphenopsida (sfen -op si da) (Gr. sphen, wedge; opsis, appear- 



ance) (simple vascular system; small, scalelike leaves; jointed stems) 

 Class Equisetineae (ek wi se -tin' e e (L. equus, horse; seta, tail or hair) 

 (horsetails or scouring rushes) (Fig. 49) 



C. Subphylum Pteropsida (ter -op' si da) (Gr. pteris, wing or fern; opsis, ap- 



pearance) (complex vascular system; large, conspicuous leaves) 



(1) Class Filicineae (fili-sin'ee) (L. filix, fern) (true ferns) (Figs. 50, 



51, and 68) 



(2) Class Gymnospermae (jim no -spur' me) (Gr. gymno, exposed or 



naked; sperma, seed) (exposed, naked seeds) (conifers and allies) 

 (Figs. 52-54) 



(3) Class Angiospermae (an ji o-spur'me) (Gr. angio, enclosed; sperma, 



seed) (true flowering plants with seeds enclosed by carpels) (Figs. 

 55 to 60) 



(a) Subclass Dicotyledoneae (di kot i le -do' ne e) (Gr. di, two; kotyle- 

 don, embryonic, seed leaf) (two cotyledons [embryonic leaves]) 

 (beans, sunflowers, dandelions, etc.) (Figs. 55 to 57) 



(b) Subclass Monocotyledoneae (mon o kot i le -do' ne e) (Gr. mono, 

 one; kotyledon, embryonic, seed leaf) (one cotyledon [embryonic 

 leaf]) (corn, grasses, etc.) (Figs. 58 to 60) 



Number of Species of Plants (Kingdom Plantae) 



approximate 

 number of 

 Subkingdom Thallophyta species 



1. Phylum Cyanophyta (blue-green algae) 1,400 



2. Phylum Chlorophyta (green algae) 5,700 



3. Phylum Chrysophyta (yellow-green, golden- 



brown algae and diatoms) 5,700 



4. Phylum Phaeophyta (brown algae) 900 



5. Phylum Rhodophyta (red algae) 2,500 



Total (Algae) _ 16,200* 



6. Phylum Schizomycophyta (bacteria) 2,500? 



7. Phylum Myxomycophyta (slime molds) 300 



8. Phylum Eumycophyta (true, higher fungi) 75,000 



(1) Class Phycomycetes (algalike fungi) 



(2) Class Ascomycetes (ascus fungi) 



(3) Class Basidiomycetes (basidium fungi) 



Total (Fungi) 77,800* 



Subkingdom Embryophyta 



9. Phylum Bryophyta 



(1) Class Musci (true mosses) 13,900 



(2) Class Hepaticae (liverworts) 8,500 



Total 22,400* 



10. Phylum Tracheophyta 



A. Subphylum Lycopsida 



(1) Class Lycopodineae (club "mosses") 900 



B. Subphylum Sphenopsida 



(1) Class Equisetineae (horsetails) 25 



*Does not include certain groups not being studied. 



