Abstract/Details

A systematic revision of <i>Croton</i> section <i>Cyclostigma</i> (Euphorbiaceae) in Ecuador


2002 2002

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Abstract (summary)

Section Cyclostigma, one of 40 sections in the large (>1,000 spp.) genus Croton, contains approximately 50 species, which are primarily distributed in the Neotropics. This section of Croton is referred to as the “sangre de drago” (dragons blood) group due to the presence of red latex in many species that is used for the treatment of numerous ailments. This study reviewed all 43 Neotropical species from section Cyclostigma, as well as other species that showed affinities with the section, to identify and resolve Ecuadorian species of section Cyclostigma. Trichome morphology, seed surface morphology, and foliar gland position were all shown to be particularly useful in making taxonomic decisions in this group. Twelve species from this section are now recognized as indigenous to Ecuador, including two endemic species and one new species presently described. A key to the twelve species found in Ecuador along with descriptions, photographic illustrations and distribution maps are provided. At the end of each species description, there is a discussion of useful field characters, and a list of local names and medicinal uses. Eight new synonymizations are proposed, and revised list of species in section Cyclostigma is given in appendix A.

Indexing (details)


Subject
Botany;
Genetics
Classification
0309: Botany
0369: Genetics
Identifier / keyword
Biological sciences; Croton; Cyclostigma; Ecuador; Euphorbiaceae
Title
A systematic revision of <i>Croton</i> section <i>Cyclostigma</i> (Euphorbiaceae) in Ecuador
Author
Smith, Brian Albert
Number of pages
254
Publication year
2002
Degree date
2002
School code
0029
Source
DAI-B 63/09, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780493843551, 0493843558
Advisor
Webster, Grady; Doyle, James (Jim)
University/institution
University of California, Davis
University location
United States -- California
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3065303
ProQuest document ID
275866914
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/275866914/abstract
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