102 DUDLEY MEMORIAL VOLUME 



Leaves in whorls, elongated. 6. Sciadopitys. 



Leaves spirally arranged or appearing 2-ranked. 



Leaves persistent for more than one season ; seeds several to a scale. 

 Cone-scales with several sharp projections. 7. Sequoia. 

 Cone-scales without sharp points. 8. Cryptomeria. 



Leaves deciduous with the slender twigs, or sometimes persistent for a year ; 

 seeds 2 to a scale. 9. Taxodium. 



6. Sciadopitys. 

 Evergreen pyramidal tree, with long needle-like leaves in whorls. Flow- 

 ers monoecious J staminate with spirally arranged 2-celled anthers. Cones 

 ovate-oblong, with broadly orbicular scales. 



1. Sciadopitys verticillata Sieb. & Zucc. Umbrella Pine. 



Leaves in whorls of 15-30, 3-6 inches long, grooved on both surfaces, 

 dark green above, and with white band beneath; cones 3-4 inches long. 



This species, which is the only member of the genus, is a native of 

 Japan. One young specimen is temporarily placed in the Nursery lath- 

 house. 



7. Sequoia. 



Tall massive forest trees with trunks usually heavily buttressed at base, 

 covered with thick fibrous bark. Leaves evergreen, linear or scale-like, de- 

 current on the twigs. Flowers terminating the branchlets, monoecious ; pollen- 

 sacs several on the lower half of the connective. Cones maturing the first 

 year, with spirally arranged, peltate scales; seeds several to each scale, red- 

 dish brown. 



Once a genus of several species widely distributed over North America, 

 Europe and Asia, but now reduced to two and restricted to the Coast Ranges 

 and the Sierra Nevada of California. 

 Leaves of 2 kinds, ordinarily flat, linear and 2-ranked, but on leading shoots 



often scale-like and spreading from all sides of the branchlets. 



1. 5. sempervirens. 

 Leaves all scale-like and scattered on all sides of the branchlets. 



2. 5. Washingtoniana. 



1. Sequoia sempervirens Endl. Redwood. 



Leaves distichously spreading, about ^ inch long, or those on leading 

 shoots smaller and scale-like; cone oblong, ^-1 inch long. 



Tall, magnificent forest trees often 200-300 feet high. The tallest tree 

 authentically measured is 340 feet. Native of the fog belt of the California 

 Coast Ranges, extending from southwestern Oregon to the Santa Lucia 

 Mountains in Monterey County, and inland not more than 20 to 30 miles. 



