DroughtTolerant wrote: I took some more photos this afternoon. Most of the STINKHORNS are all dried up already. Check it out! This is what they look like in the afternoon. Not much left, and you can see the hole where the "egg" thing used to be. I guess it converts all that goo into vertical growth so fast it leaves an egg shaped hole. The flies will take the spores to their next home. How very interesting. Thanks again to everyone here at Dave's Garden!
Based on the most helpful link to the Stinkhorn website (thank you SoooSirius!), it looks to me like this plant is closest to the Mutinus ravenelii. (Photo at very bottom of that web page, look for photo labels) http://www.mushroomexpert.com/mutinus_elegans.html
I will note that we never saw anything even similar to this until we tore out our lawn & replaced it with drought tolerant plants, stones and Diamondia. Since these Stinkhorns are appearing in and near the Diamondia, I'm going to guess they came in with that dirt. We did also buy shredded wood (not bark, wood) from the same place, but I haven't seen any Stinkhorns in the areas covered by shredded wood.