Here's my most recently acquired image of a protandrous species. Another two-day marvel! The anthers you see here are active the first day. The second day (see the album in the Agavaceae family)the pistil is extended and active, and the anthers have released their pollen and have dried up. Effective strategy to prevent cross pollination? Maybe not, because flowers on the same plant can be in different phases. This false aloe doesn't look very attractive, but it doesn't have to. It is very fragrant at night, and is pollinated by insects that collect its nectar and are attracted by its night time fragrance.