Acaciela angustissima is the former Acacia angustissima. I suspect the name change is about priority. The plant already had a published name and then...
There are around 30 species of Porophyllum, the majority of which are found in Mexico and southward. Around me in the borderlands of Arizona...
Butterfly weed (Asclepias tuberosa) makes up for its lack of milky sap with the copious amount of nectar found in the flowers. Stand back...