Biology Reference
In-Depth Information
blooming dates, variety
arizonica
blooming later than variety
spicata
in at least
some areas where they are sympatric (Coleman
2002
; Goldman et al.
2002
).
Coleman (
2005
) found that summer rains (June-September) were fairly constant
DURINGAYEARPERIODIN!RIZONABUTTHATVARIATIONSINWINTERRAINS/CTOBERn-AY
correlated with the number of blooming plants in
H. revoluta
, var.
colemanii
, and
Engel (
1987
) reported a correlation between blooming and ample late spring rains
over a period of 7 years for
H. nitida
in Texas. The process of blooming and presum-
ably fruiting apparently requires the expenditure of a significant fraction of the
available stored reserves. Coleman (
2002, 2005
) reported that
H. revoluta
and
H. spicata
did not reemerge for one or more years after blooming. However, addi-
tional research is needed on the causes of dormancy in these orchids.
2EPRODUCTIONIN
H. spicata
var.
arizonica
was also limited by browsing and by
the unexplained abortion of 10-80% of the developing spikes and buds. In some
years, only one or two plants in a colony of 50 or 60 that began development
survived to produce flowers (Coleman
2002
).
No reports have been published on the pollination biology of the remaining
American taxa,
H. spicata
var.
spicata
,
H. warnockii
Ames and Correll (purple-
spike coralroot), and
H. grandiflora
!2ICHARDAND'ALEOTTI,/7ILLIAMS
(Greenman's coralroot).
References
!DAMS2-'OSS'*4HEREPRODUCTIVEBIOLOGYOFTHEEPIPHYTICORCHIDSOF&LORIDA)))
Epidendrum anceps Jacquin. Am Orchid Soc Bull 45:488-492
"USH 30 +UTZ 7% 'EOGRAPHICAL VARIATION IN THE WIDESPREAD TEMPERATE EPIPHYTE
Epidendrum magnolieae
Muhlenberg (Orchidaceae). Selbyana 27:201-207
Catling PM (1990) Auto-pollination in the Orchidaceae. In: Arditti J (ed) Orchid biology, reviews
ANDPERSPECTIVESVOL4IMBER0ORTLAND/2PPn
Catling PM (2004) A synopsis of the genus
Hexalectris
in the United States and a new variety of
Hexalectris revoluta
. Nat Orchid Conf J 1:5-25
Catling PM, Engel VS (1993) Systematics and distribution of
Hexalectris spicata
var.
arizonica
(Orchidaceae). Lindleyana 8:119-125
#OLEMAN2!4HEWILDORCHIDSOF!RIZONAAND.EW-EXICO#OMSTOCK0UBLISHING
Associates, a division of Cornell University Press, Ithaca, NY
#OLEMAN2!0OPULATIONSTUDIESIN
Dichromanthus
and
Hexalectris
INSOUTHEASTERN!RIZONA
Selbyana 26:246-250
Correll DS (1978) Native orchids of North America North of Mexico. Stanford University Press,
Stanford, California
Engel VS (1987) Saprophyte orchids of Dallas. Am Orchid Soc Bull 56:831-835
'OLDMAN$(#OLEMAN2!-AGRATH,!#ATLING0-
Hexalectris
. In: Flora of North
America Editorial Committee (ed) Flora of North America North of Mexico, vol 26. Oxford
University Press, Oxford, pp 603-607
Goss GJ (1973) Pollination biology in the Orchidaceae:
Polystachia flavescens
,
Epidendrum dif-
forme
, and
Eulophia alta
from South Florida;
Encyclia altissima
,
Encyclia rufa
from Great
Inagua, Bahamas. Masters Thesis, Florida Atlantic University
Goss GJ (1977) The reproductive biology of the epiphytic orchids of Florida, 5. Epidendron
difforme Jacquin. Am Orchid Soc Bull 46:631-636
Search WWH ::
Custom Search