Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, michiganflora.net will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

Ceanothus

1. Inflorescences on peduncles arising from branches of the previous year; shrub usually over 1 m tall; known only from Keweenaw Co.

C. sanguineus

1. Inflorescences on peduncles or branchlets of the current year; shrub less than 1 m tall; widespread.

2. Inflorescences axillary, on peduncles from the upper (2–) 3–7 (–10) nodes (of well developed shoots); widest leaf blades 2.1–5 (–6) cm broad.

C. americanus

2. Inflorescences terminal on leafy branches, occasionally with 1–4 additional lateral peduncles present on robust plants; principal leaf blades 1–2.2 (–2.5 or very rarely 3.5) cm broad.

C. herbaceus

All species found in Ceanothus

Ceanothus americanusNEW JERSEY TEA 
Ceanothus herbaceusNEW JERSEY TEA 
Ceanothus sanguineusWILD-LILAC, REDSTEM CEANOTHUS 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 29, 2023. https://michiganflora.net/genus.aspx?id=Ceanothus.