Data on 83 attributes were compiled for a sample of 543 genera of dicotyledons.
Computational analyses and subsequent consideration suggest that a useful distinction
can be made between crassinucellate (mainly apetalous and polypetalous) and tenuinucellate
(mainly sympetalous) genera. The crassinucellate series incorporates rather
distinct caryophylloid and magnolioid assemblages, the former corresponding to a
large extent with the Caryophyllidae of recent taxonomic schemes, the latter being a
greatly extended version of the Magnoliidae. No evidence is found to support the
Rosidae or Dilleniidae as taxonomic groupings. The tenuinucellate series seems to
include two previously unrecognized major groups, here called acanthoids and
asclepioids, plus Compositae and Umbelliferae as outliers. The large orders Rosales,
Umbellales, and Myrtales may well be taxonomically unsound.
The shortage and general inaccessibility of truly comparative data constitutes a
serious difficulty in considering major taxonomic problems; in general these demand
better information than seems currently obtainable if reliable results are to be obtained.
Although methemoglobinemia is not commonly seen in the ER or the critical care setting, it can be life threatening if unrecognized and left untreated. A detailed case history illustrates the symptoms and some of the possible precipitating factors, and outlines treatment for a successful patient outcome.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.