Abstract Cirsium (ie,“thistles”) are one of the most taxonomically challenging groups of
Compositae in North America. This study represents the first attempt to infer a broadly …

Premise of research. Cirsium (“thistles”), the most speciose genus in the Compositae
(Asteraceae) subfamily Carduoideae native to North America, comprises a rapid endemic …

Six new varieties are proposed in North American Cirsium (Asteraceae: Cardueae): C.
arizonicum (A. Gray) Petrak var. tenuisectum DJ Keil var. nov, C. eatonii (A. Gray) BL Rob …

Generic delimitations within the cosmopolitan Carduus‐Cirsium group (ie,“thistles”) have a
long history of taxonomic confusion and debate. We present the most comprehensive …

The tribe Cardueae is one of the largest in Compositae, with some 2400 species in 73
genera (Susanna and Garcia-Jacas 2007). It is also one of the most complicated because of …

Although the polyphyletic genus Scirpus L. sl (formerly> 200 species) has been divided into
more than 50 separate genera and now consists of only 64 species, its circumscription …

Throughout the world, the diversity of fungi remains poorly characterized and Cortinarius is a
classical example of a difficult, species-rich, and under-researched mushroom genus. Here …

We investigated the phylogeny of the Arctioid lineage of the Arctium‐Cousinia complex in an
attempt to clarify the conflictive generic boundaries of Arctium and Cousinia. The study was …

Carex L. sect. Racemosae G. Don (Cyperaceae) is a northern hemisphere group of ca. 60
species with 11 indigenous species reported from California (Murray, 2002). One …

PREMISE OF THE STUDY: Relationships among closely related and recently diverged taxa
can be especially difficult to resolve. Here we use both Sanger sequencing and next …