Biology Reference
In-Depth Information
Chapter 7
Tribes Cymbidieae and Epidendreae
Abstract
Eulophia alta
and
E. ecristata
occur in North America north of Florida
and Mexico, but their pollination has not been studied here. Although autogamy has
been reported elsewhere, a recent Florida study of
E. alta
found that autogamy was
rare and produced seeds that developed more slowly than seed produced by other
treatments. Morphology of the flower of
Epidendrum magnoliae
, along with its
production of an intense nocturnal fragrance, suggests pollination by nocturnal
moths.
Hexalectris revoluta
var.
colemanii
is an obligate outbreeder, whereas
H. nitida
,
H. spicata
var.
arizonica
, and
H. revoluta
var.
revoluta
are autogamous.
H. revoluta
and
H. nitida
appear to be resource limited.
Keywords
Eulophia
s
Epidendrum
s
Hexalectris
s!UTOGAMYANDRETARDEDSEED
DEVELOPMENTs)NTRAGENERICVARIATIONINBREEDINGSYSTEMSs2ESOURCELIMITATION
s.OCTURNALMOTHS
Cymbidieae
The Cymbidieae includes 28 widespread genera (Stern and Judd
2002
). If
Pteroglossaspis
2EICHENBACHFISTREATEDASASYNONYMOF
Eulophia
in accordance with
the World Checklist of Monocotyledons (
2008
), only one genus occurs in our flora.
Eulophia R. Brown ex Lindley
Two of two hundred and fifteen to two hundred and twenty-five species belonging
to this large, pantropical but primarily African and Asian genus occur in the south-
eastern USA north of Florida:
Eulophia alta
,&AWCETTAND2ENDLE&IG
7.1a, b
)
in southeastern Georgia and
E. ecristata
(Fernald) Ames (=
Pteroglossaspis ecris-
tata
&ERNALD2OLFEINCOASTAL3OUTHAND.ORTH#AROLINA!LABAMAAND,OUISIANA
2OMERO'ONZALEZ
2002a, b
).
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