World checklist of hornworts and liverworts

A working checklist of accepted taxa worldwide is vital in achieving the goal of developing an online flora of all known plants by 2020 as part of the Global Strategy for Plant Conservation. We here present the first-ever worldwide checklist for liverworts (Marchantiophyta) and hornworts (Anthocerotophyta) that includes 7486 species in 398 genera representing 92 families from the two phyla. The checklist has far reaching implications and applications, including providing a valuable tool for taxonomists and systematists, analyzing phytogeographic and diversity patterns, aiding in the assessment of floristic and taxonomic knowledge, and identifying geographical gaps in our understanding of the global liverwort and hornwort flora. The checklist is derived from a working data set centralizing nomenclature, taxonomy and geography on a global scale. Prior to this effort a lack of centralization has been a major impediment for the study and analysis of species richness, conservation and systematic research at both regional and global scales. The success of this checklist, initiated in 2008, has been underpinned by its community approach involving taxonomic specialists working towards a consensus on taxonomy, nomenclature and distribution

Interesting leafy Hepaticae of the Straits region of Michigan.

http://deepblue.lib.umich.edu/bitstream/2027.42/52265/1/696.pdfDescription of 696.pdf : Access restricted to on-site users at the U-M Biological Station

Fossombronia marshii (Marchantiophyta), a new liverwort species from Arkansas

Volume: 92Start Page: 230End Page: 23

Top1 levels in topotecan-responsive and -nonresponsive xenograft models.

<p>Mice treated with water vehicle or single dose 1.0 MTD topotecan for the designated times were assessed for Top1 levels using the validated immunoassay. (A) Mice bearing A375, topotecan-responsive xenografts were collected 2, 4, or 7 hours after treatment (n = 4/cohort). (B) HCT 116 colon cancer xenografts were collected 2, 5, and 24 hours after treatment and compared to baseline (0 h, no vehicle). n = 3–6 topotecan-treated mice/cohort and n = 12 in the 0 h cohort. (C) Colo829 xenografts were collected 4, 7, or 24 hours after treatment (n = 3/cohort). (D) SK-MEL-28 xenografts were collected 2, 5, or 24 hours after treatment (n = 6/cohort). Box plots represent interquartile range, 10^th and 90^th percentile whiskers, and median Top1 levels; diamonds represent group mean. Asterisks (*), treatment cohort mean was statistically different from the vehicle mean at same time point (or baseline in the HCT 116 cohorts), with a significance level of P≤0.05, as determined by Student's one-tailed <i>t</i>-test.</p