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 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 images

B2 Grains subprolate

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

Capsicum images

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

Crotolaria images

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

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 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 images

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

Helicteres images

G1 Grains smaller

H2 Grains oblate to peroblate

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

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 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 images

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

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 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 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 images

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

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 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 images

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

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 images

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

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 images

Y1 Grains subprolate

AA2 Grains psilate

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

Stylosanthes images

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

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 images

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

Xylosima images

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

Sophora images

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

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 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 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 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 images

X1 Grains oblate-spheroidal to suboblate

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

Ludwigia images

JJ1 No vestibulum

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

Tecoma images

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

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