150 VASCULAR PLANTS. 



1- Pinus, Tournef. 



o flowers on elongated axes; the different 

 axes crowded into an inflorescence round the 

 base of a new shoot. 9 flowers with fertile 

 scales protected by bracts, which are much 

 smaller than the scales. Scales of the cone> 

 persistent and elevated into a tumor (umbo). 



T ? . leaves 1 — 5, from a squamous sheath. 



2- Tsuga, Carriere. 



$ flowers on an elongated axis. Axes from 

 axils of last year's leaves, crowded. 9 : scales 

 scarcely larger than the bracts. Scales of the 

 cone persistent not thickened toward the apex. 



t? . leaves distichous, articulated on a persis- 

 tent, woody base. 



3. Pseudotsuga, Carriere. 



Flowers from the axils of last year's leaves, 

 crowded; $ on elongated axes; scales of $ 

 flower considerably smaller than the bracts, 

 persistent. Cones pendulous. 



£ . leaves distichous, base 0. 



Family CIX. Cupressineae. 



$ flowers in whorls round an axis. No dis- 

 tinction between scales and bracts. Micropyle 

 directed upwards. 



1. Sequoia, Endl. 



Cones ovate; scales oo, cuneiform, spreading 



