CCXXTIT. CONIFERS. 



74J 



Pine. 

 Ripe pollen (mag.). 



Pine. Seed. 



Pine. 



Seed cut vertically 

 (mag.), 



Pine. 



Imaginary figure, showing 



the suspensors and 



rudimentary embryos. 



(E. Brown.) 



T. 



Pino. 



Germinating embryo. 

 T. canlicle ; C. coty- 

 ledons surrounding 

 the plant u le. 



Fir. 



Suspensor adhering 

 above to a micropylar 

 vesicle, and terminated 

 below by a rudi- 

 mentary embryo. 



Araucaria. 

 Antheriferous scale. 



Arthrolaxis. 

 Ovuliferous scale. 



Podoearpus. 

 Section of ovule. 



Sequoia. 

 Ovuliferous scale. 



Sequoia. 

 Section of ovule. 



Coniferte, which have played so considerable a part in all the geological epochs of our planet, are to 

 this day one of the most numerous and widely-spread families in the world. They form a class rather 

 than a family, and their tribes may be considered as so many distinct orders, themselves capable of sub^ 

 division. These tribes or sub-orders are the following : 



TRIBE I. ABIETINJE, L.-G. Rich. 



TREES, usually tall, often gigantic, resinous, trunk conical, branches numerous, 

 most frequently whorled ; or SHRUBS with divaricate branches ; BUDS naked or scaly. 

 LEAVES usually persistent, stifl^ narrow-linear, subulate, lanceolate or elliptic, 



