Croton type L.
Metadata
Description
Figs. 1 to 10: Croton gibsonianus; SEM, close-up (a part enlarged) showing 5-6 furrowed verrucae on the muri and intra-luminal elements
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Inaperturate, with verrucate surface in high focus (photographed at x400)
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
A slightly low focus of Fig. 2
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
A part of inaperturate pollen in high focus showing 5-7 verrucae around lumina
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Focus 2 of Fig. 4 showing faintly the intra-luminal elements
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Lowest focus of Fig. 4 showing subcircular to subtriangular shapes of verrucae in cross section
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Deepest focus of Fig. 4 showing luminal bases and verrucae
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
A part of inaperturate pollen in high focus showing 5-7 verrucae around lumina
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Focus 2 of Fig. 8 showing faintly the intra-luminal elements
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Lowest focus of Fig. 8 showing subcircular to subtriangular shapes of verrucae in cross section
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Figs. 11-15: Croton malabaricus; inaperturate, verrucate surface in high focus
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Low focus of Fig. 11
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Lower focus of Fig. 11
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
Optical section of Fig. 13
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Metadata
Description
A broken grain, note the optical section of lower fractured exine
Pollen Slide N°
IFP 21756
Code
crottype
Type
Still image
Creator
IFP Team
Creation Date
[s.d.]
Publisher
Institut français de Pondichéry
License
Family
Genus
Key
pollen_000032
Collection Object
Basis of Record
Preserved specimen
Event Date
1981-10-21 (Pollen Slide N°: IFP 21756)
Catalog Number
Record Number
HIFP SH291 (Pollen Slide N°: IFP 21756)
Collection Code
PIFP
Institution Code
IFP
Code
crottype
Pollen Slide N°
Pollen Slide N°: IFP 21756
Determination
Family
Genus
Specific Epithet
Scientific Name
Genus Authorship
L.
Infraspecific Epithet Authorship
gibsonianus
malabaricus
Morphology
Symmetry and Form
Monad, spherical_to_spheroidal symmetry, apolar, inaperturate (omniaperturate)
Dimensions
Diameter = 45-70 µm
Apertures
Inaperturate (no ectexinal apertural markings) or omniaperturate (any part capable of functioning as an exit for pollen tube)
Exine
Croton pattern: clavate, exine thickness +sculpture ±3.0-4.0 µm, intraluminal elements present
Remark
A stenopalynous genus characterised by Croton type of pollen; Croton pollen type (sensu Punt, W. 1962) in Blachia denudata, Dimorphocalyx lawianus, and Fahrenheitia zeylanica are also illustrated and described in this work
Tentative Pollen Typification
Croton type
References (Generic Palynology)
LM and SEM of Croton gibsonianus and LM of C. malabaricus in Tissot, C., Chikhi, H. & Nayar, T.S. (1994); TEM of C. lexensis in Larson, D.A., Skvarla, J.J. & Lewis, C.W. (1962). TEM of C. cratissimus subsp. subcratissimus in Frean, M.L. (1973) showing supratectal clavae, tectum, columellae, footlayer and interbedded zone
Location
Continent
Country
State / Province
County / District
Locality
South Bhadra R.F., Bhagvati (Pollen Slide N°: IFP 21756)
Adheripatty (Pollen Slide N°: IFP 1171)
Ecology and Taxonomy
Croton gibsonianus: A large shrub to small tree in the moist deciduous and evergreen forests. Common. Leaf illustration: Pascal, J-P. & Ramesh, B.R. (1987), fig. 137. Generic description and specific key not in Flora of Madras. (See: J. Grah. Cat. Pl. Bomb. 251). C. malabaricus: A medium sized tree in the evergreen forests. Leaf illustration: Pascal, J-P. & Ramesh, B.R. (1987), fig. 138. Generic description and specific key in Flora of Madras: p. 918 (Gamble, J.S., 1967)
Distribution of Species
i. Croton gibsonianus: Western Peninsular India, and Northeast of Deccan. Western Ghats: Konkan, Kanara; ii. C. malabaricus: Western Peninsular India. Western Ghats: Konkan, Kanara, Malabar and Travancore. Map: Ramesh, B.R & Pascal, J-P. (1997): Plate N°- 119
Distribution of Genus
750 spp., Trop. & subtrop. (Willis, J.C., 1988). Keys and distribution data for 9 species in Flora of Madras: pp. 918-920 (Gamble, J.S., 1967)
Reuse
License
Cite as
Croton type L.,
in Digital Collections, Institut Français de Pondichéry,
Pollen Slides,
consulted on February, 5th 2025, https://ifp.inist.fr/s/ecological-specimens/item/461786