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Key to Juniperus of China, e. Himalayas, Mongolia, e. Russia, Korea. rev. 2/2011 1a. All leaves acicular (subulate, jointed at the base), in whorls of 3, cones borne axillary
 

Summary: Key to Juniperus of China, e. Himalayas, Mongolia, e. Russia, Korea. rev. 2/2011
1a. All leaves acicular (subulate, jointed at the base), in whorls of 3, cones borne axillary
(section Juniperus)
2a. Leaves with 2 white stomatal bands on the adaxial surface, seed cones reddish when
immature, turning reddish-blue to blue/black at maturity.................................J. formosana
2b. Leaves with 1 white stomatal band on the adaxial surface
3a. Leaves 'V' shaped in cross section, 12 - 22 mm x 0.5 - 0.9 mm wide, with a keel (ridge)
on the abaxial side, deeply grooved, white stomatal band narrower that green margins,
seed cones reddish when immature, turning bluish-black when mature...............J. rigida
3b. Leaves nearly flat to curved in cross section, 4 - 10 (-12) mm x 1 mm or more wide,
white stomatal band wider than green margins, seed cones blue to blue-black....
...................................................................................................................................J. communis
1b. Leaves decurrent (not subulate, not jointed at the base), both scale-like and whip (decurrent
with free tips) leaves, only whip-leaves on juvenile plants and at the tips of adult foliage,
leaves in pairs or whorls of 3, cones borne terminal (section Sabina)
4a. All leaves of one kind, decurrent, with a blade (that is free) and a sheath (that clasps the
stem)
5a. Seed cones 2 - 3 seeded...................................................................................J. procumbens
5b. Seed cones 1 seeded
6a. Leaf tips (blades) appressed to stem giving the ultimate branchlets a smooth rope

  

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

 

Collections: Biology and Medicine