Biology Reference
In-Depth Information
of
C. barbatus
and
C. pallidus
barely overlap, and little pollen transfer occurs
between them (Thien
1973
). In addition, the flowers of
C. multiflorus
produce
a strong, pungent fragrance at peak anthesis, whereas those of
C. barbatus
and
C. pallidus
, respectively, have either no odor or only an occasional, weak fragrance
(Goldman and Orzell
2000
). Thus, pollinator attraction may differ. Heinrich (
1975
)
and Luer (
1975
) reported species of
Bombus
,
Xylocopa virginica
and
Apis mellifera
as pollinators of
C. pallidus
. Robertson (
1887
) reported
Augochloropsis sumptuosa
(Smith) (as
Augochlora sumptuosa
(Smith)) and an unidentified species of
Augochlora
as pollinators of
C. barbatus.
Both were females. The pollination
mechanism is the same as reported for
C. tuberosus
with pollen attaching dorsally
to the first abdominal segment.
Bombus griseocollis
,
Augochlora pura pura
(Say),
(as
A. festiva
Smith) and unidentified species of
Halictus
Latreille also occasionally
visited the flowers but were ineffective pollen vectors (Robertson
1887
, cf. Thien
1973
). Rare natural hybridization events among these species are not, however,
unknown (Goldman and Orzell
2000
; Goldman et al.
2004
).
References
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