ISSN:
1615-6110
Keywords:
Angiosperms
;
Apocynaceae
;
Plumerioideae
;
Apocynoideae
;
Holarrheninae
;
Holarrhena
;
Carruthersia
;
Spirolobium
;
Floral structure
;
pollen morphology
;
indole alkaloids
;
steroidal alkaloids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The genusHolarrhena, described byRobert Brown in 1811, has had a problematic taxonomic history, in part due to a suite of characters that does not conform with accepted concepts within theApocynaceae. In a number of important taxonomic charactersHolarrhena is typical of subfam.Apocynoideae. But due to the relatively unspecialized structure of the anthers most recent authors have placedHolarrheng, together withCarruthersia andSpirolobium, as the subtribeHolarrheninae in subfam.Plumerioideae. For the present investigation the floral structure and pollen morphology ofHolarrhena, Carruthersia andSpirolobium were analyzed. From the chemical literature reports of the occurrence of steroidal alkaloids in thePlumerioideae were evaluated. Our results indicate that the three genera belong to subfam.Apocynoideae in the tribeNerieae, but that the “Holarrheninae” is an unnatural group, and that the three genera should be accommodated individually within the tribe.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00940603
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