|Photo Details - ©Nicky Davis
Description from http://www.swcoloradowildflowers.com
tenuituba tends to occur at relatively high elevations or at least in
subalpine fir and higher elevation sagebrush communities.
aggregata has a wide range of ecological associations but generally
is not at the upper limits of subalpine forest.
I. tenuituba has a pale pink
to lavender, sometimes very light purple corolla.
I. aggregata has a red to orange-red corolla.
I. tenuituba has a more slender
tube and is about 20-45 mm long.
I. aggregata has a tube about 15-25 mm long.
I. tenuituba has long, slender
I. aggregata has shorter, tapering calyx lobes.
I. tenuituba has anthers within
the tube, with no more than one anther protruding from the throat.
I. aggregata has 3-5 anthers in the throat or protruding
beyond the throat.
tenuituba generally produces nectar in the early morning or late afternoon,
is sweet-smelling in the evening, and is pollinated principally by moths,
aggregata generally produces nectar during the day in large quantities,
is odorless, and is pollinated principally by hummingbirds.
two species do hybridize." Al Schneider who received the information
from Dieter Wilken of the Santa Barbara Botanic