The pollen grains were reported as trizonocolporate (tricolporate), prolate spheroidal, oval in meridional view, 25-50 microns in size and with lalongate ora (pores) and a surface patterning ranging from obscure - psilate
- striate - rugulose.
The pollen of Mutisieae and Stifftieae is microechinate, echinate, or almost psilate
in some members of Mutisieae; the exine is distinctly bilayered but commonly with a compact ectosexine constituted by columellae very thickly disposed and an endosexine with columellae clearly distinguishable, stout and ramified (Hansen, 1991b; Telleria et al.
5 mm long, dorsifixed near the base, base sagittate, apex acute; Pollen ellipsoid, sulcate, psilate
or inconspicuously brochate; Style surpassing the anthers; Stigma simple erect, white, blades spatulate, erect, ca.
Pollen subprolate to prolate, large size, tricolporate, exine Mutisia type, microechinate or almost psilate
(see also Parra & Marticorena, 1972).
12 mm long, dorsifixed slightly above the middle, base sagittate, apex subacute and apiculate; pollen broadly oblong-ellipsoid, apparently sulcate, exine psilate
to microreticulate; stigma conduplicate-spiral, cylindrical, ca.
Tricolporate, colpi long with psilate
In the following discussion, echinate means having surface spines of at least 1 [micro]m in height, regardless of whether there are surface ridges or not; the alternative, psilate
, means without surface spines of at least 1 [micro]m in height (a distinction traditionally applied because such grains appear effectively smooth under LM).
Bernardia trelawniensis has a punctate tectum with a psilate
surface and lacks an operculum (Fig.
They were described by Musselman (2003) as psilate
Monads, tetrads, and polyads are observed; the pollen size ranges from very small to medium (rarely large); and the tectum is perforate, (micro)reticulate, foveolate, psilate
, or rugulate.
latter has aspis structure in the pore area and has psilate
slits; pollen monosulcate, proximal sculpturing psilate