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5. S. COULTEBI Anders. Monandrous; 

 ameuts in the axils of persistent leaves. V . 

 Mar in County. Spring. 



2. Populus Tourn. 

 POPLAR COT ION WOOD. 

 Bracts fimbriate, laciniate. !? . 

 1. P. TRICHOCARPA Torr. & Gray. J? . Ha- 

 rm County. Niles. Spring. 



ORDER 8. PAEIETALES. Ovary 1-celled; 

 placentation parietal; ovules oo. 



Family 1, CISTINE^. 



Calyx 2-seriate; 2 external sepals smaller 

 than the 3 internal, contorted to the left in 

 aestivation, sometimes 0. Petals 5, caducous, 

 contorted to the right in aestivation. Stamens 

 GO . Ovary free, formed by several connate 

 carpidia; style 1. Fruit a capsule; placenta- 

 tion sometimes apparently axillary, by pla- 

 centae protruding towards the center. 



1. Helianthemum Tonm. ROCK-ROSE. 



Ovary 3-valved. Placentas in the middle of 

 the valves; each valve more than 2-seeded. 

 .Flowers yellow. 



1. H. SCOPARIUM Nutt. U. Tamalpai?. 

 Summer. 



Family 2. LOASACE^E, 



Calyx-tube more or less connate with the 

 10 



