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DR. M. T. MASTERS ON THE MORPHOLOGY, 



rophyll. This leaf consists of a filament expanding above into a 

 connective representing the lamina of an ordinary leaf and 

 which is usually flat, in one plane, with one anther-lobe on 

 each side (fig. 17), or the laminar portion may be 

 more or less expanded at right angles to the stalk, 

 thus forming a peltate expansion as in Taxus, or much 

 more developed at the apical end than elsewhere, as in 



most of the CupressineaB. 



Sometimes the anthers are arranged in a ring around 

 the point where the filament expands into the peltate 

 lamina (Taxus), thus resembling the arrangement of F\g. 17. 

 the sporangia in JEquisetum or Marchantia. In other A " ther of 

 cases they are placed at the lower edge of the lamina 

 below the attachment of the stalk or filament, as in Cupressineae, 

 an arrangement which may be compared to that of Zamia. 



The number, colour, form, and mode of dehiscence of the anther- 

 lobes vary in different genera and species, as does also the ap- 

 pearance of the connective. 



Some of the principal modifications may here be incidentally 

 mentioned. 







Sequoia 









Number of 'Pollen-Sacs : — 2 in Pinus, Picea, Abies, Podocarpus, 

 Dacrydium, Ginkgo, Phyllocladus, Athrotaxis, Sequoia, Sciado- 

 pitys ; 2-4 in Cupressinece ; 3 in Cephalotaxus, Cunninghamia ; 

 4 in Torreya; 5-8 in Taxus ; 8-15 in Agathis \ 6-20 in Arau- 

 caria, &c. 



Direction of the Anther-lobes :— (1) Parallel with or mostly 

 continuous with the filament : Pinus, Abies, Picea, Sequoia, Scia- 

 dopitys % Phyllocladus, Agathis, Pseudolarix. — (2) Divergent at 

 the base, often pendulous from the apex of the filament or pel- 

 tate : Taxus, Ginkgo, Tsuga, Sciadopitys, Cunninghamia, Torreya 







m 







n 







JUicrocachrys, Dacrydium, Podocarpus, Araucaria, most of the 

 Cupressinex, Sequoia, Athrotaxis, Cryptomeria, Taxodium. 



Dehiscence of the Anthers :— (1) Longitudinal: Pinus, Agathis, 

 Araucaria, Cedrus, Larix, Pseudolarix, Sciadopitys, Cunninghamia, 

 Sequoia, Athrotaxis, Cryptomeria, Taxodium, Callitris, Libocedrus, 

 Cupressus, Juniperus, Phyllocladus, Cephalotaxus, Taxus.— (?) 

 Transverse: Abies (some species), Podocarpus spp., Dacrydium, 

 Microcachrys, Pseudotsuga. 



The Connective. — The variations presented by the connective are 

 also of value for classificatory purposes. Physiologically the con- 









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