Biology Reference
In-Depth Information
Chapter 4
Tribe Triphoreae
Abstract
The flowers of
Triphora trianthophora
are self-compatible but not
autogamous. Predation and pollen limitation vary among populations, and vegeta-
tive reproduction can be significant in some seasons at some sites. However, sexual
reproduction and outcrossing appear to predominate and may be facilitated by
synchronous blooming. Fruit set appears related to population size at some loca-
tions. Pollination mechanisms are discussed. The primary pollinators are small,
short-tongued bees of the family Halictidae.
Keywords
Triphora
s/UTCROSSINGANDSYNCHRONOUSBLOOMINGs0REDATIONAND
POLLENLIMITATIONs6EGETATIVEREPRODUCTIONs&RUITSETANDPOPULATIONSIZEs3HORT
TONGUEDHALICTIDBEESs!NDRENIDBEES
The tribe Triphoreae comprises 4 genera and about 28-30 species (Pridgeon et al.
2005
). Representatives are found in North-, Central-, and South America with one
species restricted to tropical West Africa. A single genus is present in our flora.
Triphora
Nuttall
Triphora
is a genus of about 19 species found in North America, the West Indies,
and through Middle America to central South America. Five species occur in North
America north of Mexico; all but one are restricted to Florida.
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