Hooker's evening primrose is very similar to
its close relative, ssp. hirsutissima, and may in fact be almost
indistinguishable unless looked at closely. Therefore, much of what
is on the page for that taxon here
also applies to this one. One difference is that hairy evening primrose
may have green sepals, but the most easily seen feature that discriminates
this taxon is the glandular hairs which have conspicuous red blister-like
bases shown in the last picture below. The anthers are also longer in
ssp. hookeri, up to 23 mm, as opposed to the 8-15 mm for ssp.
hirsutissima. This subspecies of Oenothera elata inhabits
generally moist places in coastal or somewhat inland areas at lower
elevations and blooms in the summer.
Click here for Latin name derivations: 1) Oenothera
2) elata 3)
Pronunciation: ee-no-THEER-a eh-LAY-ta HOOK-er-eye.
Click here for Botanical