Skip to main content

Taxonomy of the Ceanothus vestitus Complex (Rhamnaceae)

Buy Article:

$23.00 plus tax (Refund Policy)



The Ceanothus vestitus complex comprises three closely-related shrub species restricted to the southwestern United States and northern Mexico: C. pauciflorus, C. perplexans, and C. vestitus. These plants are an ecologically important component of shrubland habitats at moderate to high elevations over a large portion of North America, and are strongly represented in herbaria. However, taxonomy in the C. vestitus complex is complicated by highly variable, intergrading morphology, leading to identification problems. We use multivariate morphometrics to explore variation, test circumscriptions, and search for diagnostic traits. Analyses are based on a suite of nine characters scored for 248 specimens. Results show that only C. perplexans is significantly divergent from other members of the complex. Furthermore, variation is continuous among species for all nine characters. Cluster analyses suggest alternative groupings, but none are discrete. Given the lack of significant divergence between C. vestitus and C. pauciflorus, we advocate the use of one name for these species. The earliest available name is C. pauciflorus. We reduce C. vestitus to synonymy with C. pauciflorus. We maintain C. perplexans, and present a case for recognition of this species in the absence of categorical identifying features.

Keywords: California; Mexico; circumscription; morphology; multivariate; statistics

Document Type: Research Article


Publication date: June 1, 2013

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more
Real Time Web Analytics