CLASS I. GYMNOSPERMS 



Plants destitute of a closed ovary, style, or stigma. Ovules 

 generally borne naked on a carpellary scale, wliich forms part 

 of a cone. Cotyledons often several (Fig. 1). 



1. PINACE.S;. Pine Family 



Trees or shrubs with wood destitute of ducts, with resinous 

 and aromatic juice. Leaves generally evergreen, and needle- 

 shaped or awl-shaped. Flowers destitute of floral envelopes, 

 moncecious or dioecious, _ the staminate ones consisting of 

 catkin-like spikes of stamens and the pistillate ones consist- 

 ing of ovule-bearing scales, arranged in spikes, which ripen 

 into cones. 



A 

 Each scale of the cone home in the axil of a bract. Seeds S, with wings. 

 Leaves evergreen, in bundles of 2-5. Pinus, I 



Leaves evergreen, solitary, sessile, keeled on both surfaces. 



Picea, II 

 Leaves evergreen, solitary, petioled, flat. Tsuga, III 



Leaves solitary, evergreen, flat above, keeled below. Abies, IV 

 Leaves clustered, deciduous, flat. Larix, V 



B 



Scales of the cone without tracts, cone becoming globular and woody. 

 Leaves linear. 



Leaves alternate, deciduous. Taxodium, VI 



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