Ixora nigricans R.Br.
Metadata
Description
SEM - equatorial view with a colpor(or)us showing microgranular colpal membrane and os-2 surrounded by a costal ring and reticulate exine
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Equatorial view with a colpororate aperture in two foci showing laterally extended non-costate os A and circular costate os B (Figs. 2-3)
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Equatorial view with a colpororate aperture in two foci showing laterally extended non-costate os A and circular costate os B (Figs. 2-3)
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Subequatorial view with a colpororate aperture with a bipartite oral part
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
SEM - equatorial view with an intercolpium
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Equatorial view with an intercolpium showing lateral thinnings of adjacent bipartite ora (Figs. 6-7)
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Equatorial view with an intercolpium showing lateral thinnings of adjacent bipartite ora (Figs. 6-7)
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
SEM - subpolar view showing acute colpal apices and microgranular colpal membrane and reticulate exine
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Polar view: colpal apices apparently obtuse
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Subpolar view: in focus 2
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Optical section of Fig. 10
Pollen Slide N°
IFP 21692
Code
ixornigr
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Key
pollen_000072
Collection Object
Basis of Record
Preserved specimen
Recorded By
Collection Code
PIFP
Institution Code
IFP
Code
ixornigr
Pollen Slide N°
Pollen Slide N°: IFP 21692
Determination
Family
Genus
Specific Epithet
Scientific Name
Scientific Name Authorship
Genus Authorship
L.
Morphology
Symmetry and Form
Monad, radial_symmetry, isopolar, 3-colpororate; spheroidal in equatorial_view; circular in polar_view
Dimensions
Polar_Axis = 20-26 µm; Equatorial_Axis = 21-25 µm
Apertures
3-colporora, colpus elliptic, colpus apex acute, aperture_membrane micro-granular, distance between the adjacent colpal apices ±5.0 µm; costae_colpi thin(?), or absent; Oral complex is differentiated into os A and os B; os A is a broad, laterally extended (5x15 µm) thinning with curved or wavy lateral apices, lalongate; os B is elliptic, surrounded by an oral costa (Fig. 3)
Exine
Micro-reticulate, tectate, mur <1.0 µm, lumina <1.0 µm infratectum columellate, exine thickness: at poles ±1.5 µm, at the mid point of intercolpium ±2.0 µm
Remark
A stenopalynous genus
Tentative Pollen Typification
Rubiaceae type X
References (Generic Palynology)
LM & SEM of Ixora nigricans in Tissot, C., Chikhi, H. & Nayar, T.S. (1994)
Location
Continent
Country
State / Province
County / District
Ecology and Taxonomy
A large shrub or small tree common on the hill slopes up to about 1600m. Leaf illustration: Pascal, J-P. & Ramesh, B.R. (1987), fig. 326. Generic description and specific key in Flora of Madras: pp. 442 - 444 (Gamble, J.S., 1967)
Distribution of Species
Indo-Malaysia, Western Ghats: in all districts
Distribution of Genus
400 spp., Trop. (Willis, J.C., 1988). Keys and distribution data for 17 species in Flora of Madras: pp. 442-446 (Gamble, J.S., 1967)
Reuse
License
Cite as
Ixora nigricans R.Br.,
in Digital Collections, Institut Français de Pondichéry,
Pollen Slides,
consulted on February, 5th 2025, https://ifp.inist.fr/s/ecological-specimens/item/461826