MATERIAL FOR LABORATORY ILLUSTRATION. Vll 



Brought forward $14, 



Lichen (Peltigera) — section of thallus . 



Liverwort (Marchantia) — section of antheridia 



Liverwort (Marchantia) — section of archegonia 



Liverwort (Marchantia) — spores and elaters 



Moss (Mnium) — section of antheridia 



Moss (Mnium) — section of archegonia 



Moss capsule showing teeth (peristome) and spores 



Fern (Polypodium) — cross-section of stem 



Fern (Polypodium) — longitudinal section of stem 



Fern (Pteris) — cross-section of stem 



Fern (Pteris) — longitudinal section of stem 



Fern — sporangia and spores 



Fern — germinating spores 



Fern — prothallium with sexual organs * 



Fern — prothallium with attached embryo 



Horsetail (Equisetum) — spores and elaters 



Quillwort (Isoetes) — section of microsporangia 



Quillwort (Isoetes) — section of macrosporangia 



Pine — mature pollen 



Pine — fruiting scale at time of pollination 



Pine — prothallium with archegonia, and pollen tube in nucellus . . 



Trillium — pollen 



Trillium — section of anther 



Trillium — section of pistil showing Iocules and ovules 



Lilium — embryo-sac in section 



Dentaria — section of pistil showing Iocules and ovules 



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75 

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$27.50 

 or the entire set for $20.00. 



Duplicate Material Free with Set. 



Pond scum (Spirogyra) in fruit. 

 Green felt (Vaucheria) in fruit. 

 Wheat rust — two stages on wheat and a cluster cup to represent the stage 



on barberry. 

 Powdery mildew. 

 Liverwort (Conocephalus). 



Moss (Polytrichum) — male, female, and fruiting plant. 

 Fern (Polypodium) — pressed plants, and sporangia in formalin. 

 Horsetail (Equisetum) — sterile and fertile plants. 

 Quillwort (Isoetes) — plants in formalin. 

 Pine — mature male and young female cones in formalin. 



These prepared slides, and other material, for laboratory work, can 

 be obtained of the Ithaca Botanical Supply Co., Ithaca, N. Y. They 

 are especially adapted to illustrate Lessons in Botany, as well as the 

 author's larger "Elementary Botany.'' 



A supplementary list of supplies representing additional topics treated 

 of in " Elementary Botany, " can be had on application to the Ithaca 

 Botanical Supply Co. 



