Key to the Pollen of the Bahamas©

Links to the keys.

Link to the Master Key Link to the Submaster Key to Rotational Grains Link to the Submaster Key to Porate Grains Link to the Submaster Key to Tricolpate Grains Link to the Submaster Key to Tricolporate Grains Link to the Key to Vesiculate Grains Link to the Key to Tetrad Grains Link to the Key to Polyad Grains Link to the Key to Bilaterally Symmetrical Grains and Spores Link to the Key to Inaperturate and Irregular Grains Link to the Key to Subtetrahedral Spores
Link to the Key to Stephanocolpate Grains Link to the Key to Pericolpate Grains Link to the Key to Monocolporate Grains Link to the Key to Polycolporate Grains Link to the Key to Tetracolporate Grains Link to the Key to Monocolpate Grains Link to the Key to Tricolpate, Psilate Grains Link to the Key to Tricolpate, Scabrate Grains Link to the Key to Tricolpate, Verrucate, Echinate Grains Link to the Key to Tricolpate, Suprareticulate Grains Link to the Key to Tricolpate, Per-reticulate Grains
Link to the Key to Tricolpate, Intectate Grains Link to the Key to Tricolporate, Psilate, Scabrate Grains Link to the Key to Tricolporate, Echinate Grains Link to the Key to Tricolporate, Foveate, Suprareticulate Grains Link to the Key to Tricolporate, Intectate, Per-reticulate Grains Link to the Key to Monoporate Grains Link to the Key to Diporate Grains Link to the Key to Triporate Grains Link to the Key to Stephanoporate Grains Link to the Key to Periporate Grains

Highlighted words are linked to their glossary definitions. Definitions and images contributed by the Glossary of Pollen and Spore Terminology,second and revised edition by Peter Hoen.


Table I1
Key to Tricolporate Psilate and Scabrate Grains

A2 Grains with costae equatoriales, endoapertures with clearly defined rims that run around the inside equator of the grain






B3 Grains prolate







C2 Endopore a slit which appears to have rounded ends giving distinct apertures, outer furrows narrow with acute ends, 19 x 28 μM

Borreria
Borreria images


C1 Endopores without obvious ends, limits of apertures indistinct, outer furrow a very fine line extending most of the length of the grain 18 x 28 μM

Phyla
Phyla images

B2 Grains subprolate







D2 Grains psilateapertures protrude slightly, grains taper slightly to rounded poles, 17 x 21 μM

Capsicum
Capsicum images


D1 Grains scabrate but very thin, poles broadly rounded, 26 x 34 μM

Crotolaria
Crotolaria images


B1 Grains prolate-spheroidal, intercolpium flattened then turning in sharply to furrow, exine very thick, 18 x19 μM

Rhizophora
Rhizophora images
A1 No costae equatoriales






E2 Grains more or less triangular in equatorial limbapertures at vertices







F2 Equatorial limb semi-lobatepsilate, 22 x 24 μM

Reynosia
Reynosia images


F1 Not semi-lobateintercolpium at most slightly concave







G3 Grains oblate-spheroidal, 38 x 36 μM, furrows long narrow slits, ends of grains flattened

Lantana
Lantana images



G2 Grains subprolate, 40 x 50 μM, ends of grains pointed, surface with sparse, scattered rounded projections

Helicteres
Helicteres images



G1 Grains smaller








H2 Grains oblate to peroblate









I2 Grains oblate, 12 x 6 μM, very flat on poles

Myrcianthes
Myrcianthes images





I1 Grains peroblate, 14 x 10 μM, domed on poles

Psidium guajava
Psidium guajava images




H1 Grains prolate-spheroidal to subprolate









J2 Grains subprolateexine thick, 16 x 20 μM

Colubrina
Colubrina images





J1 Grains prolate-spheroidalexine very thin, 24 x 26 μM

Psidium longipes
Psidium longipes images

E1 Equatorial limb other, or at most slightly triangular







K3 Equatorial limb with more or less a 6-lobed appearance in polar view (like a torx screw head)







L2 Intercolpium slightly indented, 6-lobed limb not always obvious








M4 Prolate, 16 x 23 μM, furrows narrow slits

Heliotropum angiospermum
Heliotropum anguiospermum images




M3 Subprolate, 20 x 24 μM, indentation of intercolpium obvious, endoaperture an elongated oval in equatorial plane, edges of apertures flare out slightly Heliotropum curassavicum
Heliotropum curassavicum images





M2 22 x 26 μM, indentation of intercolpium hard to see, endoaperture a round pore, edges of apertures do not flare out
Mallotonia
Mallotonia images




M1 Prolate-spheroidal, 16 x 17 μM, apertures flare out strongly

Conocarpus
Conocarpus images



L1 Intercolpium strongly indented, 6-lobed appearance obvious








N2 Grains somewhat irregular in shape, small, 10-11 μM in equatorial diameterexine very thick

Laguncularia
Laguncularia images




N1 Grains regular in shape, larger









O2 Colpus not obvious, round bottom on all longitudinal grooves in polar viewsubprolate 18 x 22 μM

Terminalia
Terminalia images





O1 Colpus a narrow line forming a distinct V in polar view










P2 Ends of grains distinctly flattened, subprolate, 21 x 24 μM

Bucida
Bucida images






P1 Ends of grains rounded, prolate-spheroidal, 18 x 20 μM

Tournefortia
Tournefortia images


K2 Equatorial limb slightly triangular with intercolpium flattened at least in the middle







Q2 Intercolpium curving strongly inward toward edges of colpi








R2 Grains scabrate with obvious fine surface texture, spheroidal, colpi clearly defined, extend well toward poles and end in acute V’s, 24 μM

Erythoxylum rotundifolium
Erythoxylum rotundifolium images




R1 Grains psilate with indistinct surface texture, oblate-spheroidal, 32 x 30 μM, ends of colpi form blunt V’s with thickened edges toward poles

Chrysobalanus
Chrysobalanus images



Q1 Intercolpium at most curving slightly inward at edges, colpi broadly open, endexine thin, not obvious, grains appear colpate








S2 Grains peroblate, 30 x 25 μM

Galactia bahamensis
Galactia bahamensis images




S1 Grains more or less spherical, 38-40 μM

Galactia rudolphioides
Galactia rudolphioides images


K1 Equatorial limb more or less round, colpi may be deeply recessed giving a 3-lobed appearance or grains may be slightly hexagonal







T2 Furrow with equatorial constriction








U2 Grains prolate, 16 x 23 μM, psilate

Dalbergia
Dalbergia images




U1 Grains prolate-spheroidal, 32 x 36 μM, colpi with thickened margins

Duranta
Duranta images



T1 Furrow without equatorial constriction








V2 Intercolpium strongly convex giving grain a 3-lobed appearance in equatorial limb









W2 Grains oblate-spheroidal, 25 x 24 μM, minute pits evenly distributed on surface

Carica
Carica images





W1 Grains subprolate, 27 x 32 μM, scabrate with minute clavate elements

Hippomane
Hippomane images




V1 Equatorial limb more circular









X3 Grains subprolate to prolate










Y2 Grains prolate











Z2 Grains nearly psilate, project out at apertures, 22 x 32 μM

Cassia lineata or Stylosanthes
Cassia lineata images (2) and Stylosanthes images (2)







Z1 Grains scabrate but with thin walls, surface appears minutely verrucate,12 x 18 μM

Hypericum
Hypericum images







Y1 Grains subprolate











AA2 Grains psilate












BB2 Grains dimpled out at apertures, thin walled, 20 x 26 μM

Stylosanthes
Stylosanthes images








BB1 Grains not dimpled out, glassy walled, 12 x 16 μM

Amyris
Amyris images







AA1 Grains scabrate












CC4 Grains minutely clavatecolpi very narrow, endopore not obvious from surface view, appears as a narrow slit in costa endocolpus, 32 x 36 μM
Jacquinia
Jacquinia images








CC3 Grains minutely clavatefurrows narrow slightly at apertures, 16 X 20 μM

Xylosima
Xylosima images








CC2 Grains minutely gemmate, relatively thick walls, 12 x 16 μM

Sophora
Sophora images








CC1 Grains minutely clavate, thick walls, edges of furrow incurved,10 x 12-14 μM

Guacium
Guacium images





X2 Grains prolate-spheroidal to spheroidal










DD2 Intercolpium crescentic in equatorial section, scabrate, relatively thick walled, 16 μM

Erithalis diffusa
Erithalis diffusa images






DD1 Intercolpium not crescentic











EE2 Apertures pop out as spherical projections, psilate, 14.5 x 16 μM

Solanum americanum
Solanum americanum images







EE1 Apertures other












FF2 Grains flare slightly at equatorscabrateintercolpium thick to edge of colpus, 16 μM

Sesuvium
Sesuvium images








FF1 Grains do not flare













GG2 Apertures in a distinctive pit in equatorial section in a recess in endexine, outer furrow narrow, scabrate, 22 μM

Piscidia
Piscidia images









GG1 Apertures not in a pit, scabrate grains














HH2 Endexine obvious, thickened at least slightly near apertures















II2 Colpi moderately wide, endexine in furrows appears textured and considerably thickened in vicinity of apertures in section view, 20-24 μM

Phialanthus
Phialanthus images











II1 Furrow narrower, no obvious texturing to endexine in furrow, 24 μM

Cassia biflora
Cassia biflora images










HH1 Endexine not obvious even at edges of apertures, not thickened, no obvious endopore, 28 x 32 μM

Guapira
Guapira images





X1 Grains oblate-spheroidal to suboblate










JJ2 Grains with finely verrucate surface, apertures very short with deep vestibulum

Ludwigia
Ludwigia images






JJ1 No vestibulum











KK2 Grains scabrate with finely clavate elements, apertures recessed, 27 x 25 μM

Tecoma
Tecoma images







KK1 Grains with projecting aperturesexine thick but thins at edges of apertures, 34 x 28 μM

Exostema
Exostema images


  To download the taxonomic key: link to download key   To return to  the introduction: link to introduction   For information on the included taxa: link to taxa and sources   For information on the glossary: link to glossary introduction