Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Key to J. communis varieties: rev 2/2011 1a. tree or upright shrub, leaves 15 20 (25) mm, straight (not curved), acuminate subulate,
 

Summary: Key to J. communis varieties: rev 2/2011
1a. tree or upright shrub, leaves 15 20 (25) mm, straight (not curved), acuminate subulate,
restricted to the eastern hemisphere .......................................................var. communis
1b. prostrate or small shrub, leaves 8 -15 mm, curved (upturned), closely set, linear to
linear-oblong, acuminate to subulate, in both eastern and/or western hemispheres
2a. seed cones 10 13 mm diam., larger than leaf length, known only from southeastern
Canada.....................................................................................................var. megistocarpa
2b. seed cones 6 9 mm diam., smaller than leaf length, eastern and western hemispheres
3a. glaucous stomatal band about as wide to 1.5 x as wide as each green leaf margin,
prostrate or low shrub with ascending branchlet tips (or occasionally a spreading
shrub), leaves upturned, rarely spreading, linear to curved, western hemisphere
...................................................................................................................var. depressa
3b. glaucous stomatal band twice or more as wide as each green leaf margin,
spreading, mat-like shrub (or occasionally upright), leaves upright, sometimes almost
imbricate, closely set, linear lanceolate
4a. mature seed cones length greater than leaf length, grows in muskeg bogs, Calvert
Island to Queen Charlotte Islands, and north to, Chichagof Island, Alaska.
...................................................................................................................var. charlottensis
4b. mature seed cones length less than or equal to leaf length
5a. mature seed cones elongated-subglobose, stomatal band 3 to 4 times as wide as

  

Source: Adams, Robert P. - Department of Biology, Baylor University

 

Collections: Biology and Medicine