lo Pinaceae 



2. Long and short shoots present. 



Long and short shoots both with deciduous leaves. 

 Cone-scales broad, coriaceous, persistent. *Larix. 



Long and short shoots both with evergreen leaves. 

 Cone-scales deciduous. *Cedrus. 



Long shoots with scales, short ones with 2-5 evergreen 

 leaves. Cone-scales woody, persistent. Pinus. 



Tribe 2. Cupressineae. Leaves opposite or whorled. 

 Ovules erect. 



Cone-scales fleshy and confluent in fruit. Only 

 British genus : Juniperus. 



Subdivision 2. ANGIOSPERMAE. Ovules en- 

 closed in an ovary formed of coherent carpels or of 

 one carpel with coherent margins. Stigma present to 

 receive pollen. 



Class I. MONOCOTYLEDONES. Embryo with 

 one cotyledon. Mature stem with closed vascular 

 bundles. Parallel venatio7i predominant. Flowers often 

 3-merous. 



A. Orders with preponderating inconstancy 

 in the number of floral leaves. (For B see page 23.) 



a. Typical acJilamydeous {jiot apopetalous) flowers 

 still occur. (For b see page 21.) 



a. Achlamydeous powers predominate. Great inconstaticy in 

 number of stamens and also of carpets. (For /3 see page 11.) 



Order i. Pandanales. Marsh herbs (or tropical 

 trees and lianes). Leaves linear. Lnjlorescence cylindrical 

 or spherical. Flowers naked or with haplochlamydeous, 

 bracteoid perianth, diclinous, fj with 00 -i stamens^ 

 % with 00 -I carpels. Seed with endosperm. 



