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amphimorph
possess pachymorph AND leptomorph rhizomes
in same system (in the McClure's sense, not Keng's).
Ex: Chusquea fendleri
leptomorph with
tillering culms
This rhizome type is characterized by possessing
leptomorph rhizomes and culms that form groups
or thickets. Although this type seems superficially to
be the same as amphimorph, this is not the case. The culms produced
in this fashion originate from what McClure termed a metamorph
1 axis. They are NOT true pachymorh rhizomes - they
are usually the same diameter as the culms that originate from
them, they are generally hollow quite deep into the ground,
and the internodes are symetrical. There is very little distinction
between the culm proper and the "rhizome".
Ex: species under Pleioblastus, Pseudosasa, Indocalamus and
Sasa genuses.
long-necked pachymorph
with tillering culms
This types is analogous to the prior but in pachymorph
rhizomes. It is characterized by long-necked pachymorph rhizomes
with culms that form groups or thickets. Again, these rhizomes
are not truly pachymorph for same reasons as above. This rhizome
type is characteristic of the genus Yushania.
long necked pachymorph
with rhizomes along the neck
The last type is the oddest of all (no name given
yet). It possesses normal pachymorph rhizomes with very
elongated culm necks, and new pachymorph rhizomes originating
along these culm necks in groups. McClure termed these strange
elongated culm necks metamorph 2 axis. This rhizome type
appears to be an adaptation to fire, and is characteristic of
the genus Vietnamosasa.
Mr. Tydyn
suggest the reading of the book by McClureL: "Bamboos
- a fresh perspective", to obtain further information.
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