Bush-mallow Challenge 5 - The Northernmost Bush-mallows

The northernmost bush-mallows are all currently lumped under Fremont's bush-mallow (Malacothamnus fremontii) which includes Malacothamnus helleri and Malacothamnus howellii. Towards the northern end of the range, known locations become sparse. Below is a map which shows historic collections as orange circles and locations I've found as white circles with Xs in them.

It would be very useful to find more locations in these northern regions. Are these really as rare up there as suggested? Are the various forms distinct or do they grade into each other in the intermediate areas? Do they go even farther north? While they go up close to Redding on the west side of the Central Valley, they aren't known north of Amador County on the east side. Is there a reason for this? Can anyone find some northern populations on the east side?

If you are in the area, keep an eye out or specifically go searching for them. Here's a photo of the northernmost form I've found so far.

Relatively recent burn areas are the best place to look. Follow this link for an interactive burn map.

See also my post here on what to focus on if you want to be able to ID a bush-mallow from photos.

Posted by keirmorse keirmorse, June 22, 2018 01:42

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