Although previously reported as inaperturate
, careful removal of the mesocarp reveals prominent shallow germination pores on the apical surface of the endocarp over each locule.
Heart-shaped leaves are 5 cm diameter with palmate venation; staminate flowers show 2 or 3 individual flowers in the apical bud (Dehgan & Webster, 1979), and the pollen grains are spheroidal of 58 [micro]m in diameter inaperturate
(Bahadur et al., 2013).
Taxus pollen is inaperturate
, between 20 25 [micro]m.
Samples 1349 (Verbios section) and 1410 (Abiada Section), showed similar assemblages (Table 1) with high percentages of bisaccate pollen grains (73.36% and 76.11%, respectively), and small amounts of circumpolles (13.57% and 17.32%, respectively) and inaperturate
(12.27% and 5.51%, respectively) grains.
85 Aperture type (0) single (presumably polar, including monosulcate and monoporate) or disulcate (one furrow at each pole), (1) inaperturate
, (2) sulculate, (3) (syn)tricolpate with colpi arranged according to Garside's law (with or without alternating colpi), (4) tricolpate.
A highly interesting observation concerns Sauromatum venosum (Araceae), which has inaperturate
pollen grains with an endexine and spines, both polysaccharidic in nature (Weber et al., 1998).
Because pollen of Xyris is thus far considered to be relatively uniform, and that of other Xyridaceae diagnostic at the generic and possibly lower taxonomic ranks (Carlquist, 1960; Campbell, 2004b), this study emphasizes Xyridaceae with spherical, apparently inaperturate
pollen with the aim of assessing pollen characters of potential taxonomic usefulness.
is unclear whether this pollen is really inaperturate
pollen with reticulate ornamentation and was discovered in
Pollen porate (inaperturate
in Condylocarpon); corolla lobes often deeply inflexed in bud; style head without membranous balsal collar; nectaries absent or indistinct from ovary; seeds not compressed (except in Plectaneia), usually with deep longitudinal hilar depression and ruminate endosperm; indole alkaloids absent Alyxieae 7.