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Key to Juniperus of Eastern Hemisphere rev. 2/2011 1a. All leaves acicular (subulate), jointed at the base, in whorls of 3, cones borne axillary
 

Summary: Key to Juniperus of Eastern Hemisphere rev. 2/2011
1a. All leaves acicular (subulate), jointed at the base, in whorls of 3, cones borne axillary
(sections Caryocedrus and Juniperus)
2a Seed cones 20-25 mm, seeds united to form a stone; male cones in axillary fascicles
.........................................................................................................................................J. drupacea
2b. Seed cones 6-15 mm, seeds free (not united), male cones solitary, axillary
3a. Seed cones blue, bluish-black, black when mature (2 -3 yrs.), may be reddish when
immature (J. formosana)
4a. Leaves with 1 white stomatal band on the adaxial surface
5a. Leaves 4 - 10 (-15) mm x 1 mm or more wide, nearly flat to curved in cross
section, white stomatal band wider than green margins..........................J. communis
5b. Leaves 7 - 25 mm x 0.5 - 0.9 mm wide, 'U' or 'V' shaped in cross section, with a
keel (ridge) on the abaxial side, deeply grooved, white stomatal band narrower
than green margins
6a. Low procumbent shrub on sands at seashores; cones 8-12 mm; leaves 10-22
mm. long .................................................................................J. rigida var. conferta
6b. Upright shrub or tree; dry areas in mountains; cones 6-9 mm; leaves 12-25
mm. long......................................................................................J. rigida var. rigida
4b. Leaves with 2 white stomatal bands on the adaxial surface
7a. Leaves with mucronate tips, flat to U shaped, 12 - 20 mm; Taiwan, e. China

  

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

 

Collections: Biology and Medicine