Triumfetta semitriloba TILIACEAE

Sample information

Sample ID177-3-7
Common nameSacramento burbark, Burweed, Jau-Jau


Pollen / Sporepollen
Morphologic typetricolporate
Surface patternreticulate
Equatorial sizemin 55, mean 57.5, max 60
Polar sizemin 30, mean 32.5, max 35
Equatorial shapeprolate
Polar shapecircular
Grain arrangementdicot
Pore colpuses3
Colpi length> 2/3
Wall thickness2.5
Exine typesemitectate
Columella visible?True
Morphology notesPore aperture overlay on transverse colpi. Three pores thin near colpus. Pore larger than colpus. Prolate. Exine thickness 2.5um. Heavy reticulated with evenly spaced columnellae. Semi-tectate,per-reticulate.

Ecology and Geography

Plant typeangiosperm
Floristic region(s)Central Pacific , Hawaiian Islands , East Pacific Islands , Other outside Australasia , Maritime Southeast Asia
Vegetation communitiesdisturbed/anthropogenic, open forest, shrubland
Habitat notesTropical Asia, Polynesia and Tropical America. Florida and the Caribbean. Diverse habitat with precipitation ranging from 760-2000mm and found growing in Hawaii from sea-level to 1067m in elevation. The species seems to do better when disturbed, in full or partial sun as small groups or dispersed individual plants. Found in the KAO3 fossil pollen record from Rano Kao, Rapa Nui (Easter Island) (Gossen,2010) Four individual plants were seen growing in Rano Kao of which one was seen flowering and fruiting. (Alden 1990)


CollectorPurnomo 36
Collection siteJawa Timur,Lumajang
Collection countryIndonesia
Collection date1998-08-12
Collection notesProcessed at the Pollen Laboratory, University of Minnesota, USA from the collecton of Ed Cushing, slide ref. B3350.
Equatorial view
Polar view
Surface pattern
Wall view
Aperture view
Unique feature