I. lindheimeri was introduced from seeds collected in the Barton Creek watershed, started in containers and then moved to selected locations. It has proved a hardy perennial in a wide range of conditions, but is also a 'deer magnet' unless protected - as in the photo above, by the sharp pointed agarita leaves.
The bindweed morningglory is a prolific annual which has taken hold in many of my other plantings - a volunteer welcome for its additional morning color.
Another common name is redthroat, but this highly variable species also has a lavender pink form:
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Nuttall originally named this species which bears his name E. pilosus. But we also have a glabrous 'variety' of E. nuttalianus for which 'pilose' is clearly inappropriate. This variety is unknown in present Evolvolus literature, but I am preparing a note for Sida to rectify that. The non-shaggy variety is shown below:
The following provides a comparison of the two forms.
These are from pressed specimens collected on June 19, 2003, when both plants bloomed following a rain - which unfortunately cause grains of sand to cling to the leaf suffaces, expecially the pilose form on the left.
A detail view of the capsules points up the difference even more clearly:
