Ceroxyloideae - Phytelephas
Ceroxyloideae - Phytelephas Ruiz & Pav.
~ Phytelephas Ruiz & Pav.
~ Phytelephas Ruiz & Pav.
~ Phytelephas Ruiz & Pav.
~ Phytelephas Ruiz & Pav.
Phytelephas Ruiz & Pav.
Phytelephas Ruiz & Pav.
~ Phytelephas Ruiz & Pav.
informative descriptor
- general stem pattern (ex-von Mohl's classification) : Cocos-Type
- shape of fibrous part in transverse section : Reniforma to Cordata - Complanata
- cortex : developed
- superficial protective layer (sub-epidermal) : suberization and sclerosis of the existing ground parenchyma
- tangential elongation and anticlinal divisions of subcortical parenchyma cells : absent
- fibrous bundles in central cylinder : present
- fibrous part adjacent to the xylem : absent
- little fibrous vascular bundles (bridges) : absent (poorly developed)
- number of phloem strand : one strand throughout the central cylinder
- radial elongation of the fibrous part (in subcortical zone) : absent
- radiating parenchyma : absent
- ground parenchyma of the central cylinder : spheroid to slightly elongated (length / width < 3–4) cells (∅ < 150 µm) and compact [sometimes few and little lacunae in old stems
- ground parenchyma sustained growth : absent (Type A)
- phytoliths : globular echinate to granulate
- number of wide metaxylem element per fibrous vascular bundle : more than 4
- tabular parenchyma : present
- end wall slope : not described
- specialisation value : [0] tracheids only — definite vessels not observed
- wide metaxylem element : present ; absent (only long angular imperforate scalariform tracheids)
- fibrous part centrifugal differentiation : absent
- metaphloem sieve plate : compound
- phytoliths distribution in central cylinder : all around the fibrous part adjacent to the phloem throughout the central cylinder
- identification within "subfamily" or "tribe" : in all palm family ; subfamily Ceroxyloideae ; without Arecoideae
cortex
central cylinder
- fibrous bundles in central cylinder : present
- shape of fibrous part in transverse section : Reniforma to Cordata - Complanata
- little fibrous vascular bundles (bridges) : absent (poorly developed)
- radiating parenchyma : absent
- tabular parenchyma : present
- paravascular parenchyma : developed
- ground parenchyma of the central cylinder : spheroid to slightly elongated (length / width < 3–4) cells (∅ < 150 µm) and compact [sometimes few and little lacunae in old stems
- ground parenchyma sustained growth : absent (Type A)
- superficial protective layer (sub-epidermal) : suberization and sclerosis of the existing ground parenchyma
- general stem pattern (ex-von Mohl's classification) : Cocos-Type
- median sinus : very shallow to absent
- auricular lobe : rounded
- auricular sinus : absent
- vascular zone position : excluded from the fibrous dorsal cap
- fibrous part adjacent to the xylem : absent
- number of wide metaxylem element per fibrous vascular bundle : more than 4
- number of phloem strand : one strand throughout the central cylinder
- radial elongation of the fibrous part (in subcortical zone) : absent
- phytoliths : globular echinate to granulate
- Tomlinson's end wall type : not described
- end wall slope : not described
- range of slope index (min_m_max) : not described
- specialisation value : [0] tracheids only — definite vessels not observed
- fibrous part centrifugal differentiation : absent
- wide metaxylem element : present ; absent (only long angular imperforate scalariform tracheids)
- tangential elongation and anticlinal divisions of subcortical parenchyma cells : absent
- metaphloem sieve plate : compound
- phytoliths distribution in central cylinder : all around the fibrous part adjacent to the phloem throughout the central cylinder
fibrous vascular bundle
- shape of fibrous part in transverse section : Reniforma to Cordata - Complanata
- fibrous part adjacent to the xylem : absent
- number of wide metaxylem element per fibrous vascular bundle : more than 4
- number of phloem strand : one strand throughout the central cylinder
- radial elongation of the fibrous part (in subcortical zone) : absent
- paravascular parenchyma : developed
- median sinus : very shallow to absent
- auricular lobe : rounded
- auricular sinus : absent
- vascular zone position : excluded from the fibrous dorsal cap
- tabular parenchyma : present
- Tomlinson's end wall type : not described
- end wall slope : not described
- range of slope index (min_m_max) : not described
- specialisation value : [0] tracheids only — definite vessels not observed
- metaphloem sieve plate : compound
- wide metaxylem element : present ; absent (only long angular imperforate scalariform tracheids)
- fibrous part centrifugal differentiation : absent
- radiating parenchyma : absent
ground parenchyma
- ground parenchyma of the central cylinder : spheroid to slightly elongated (length / width < 3–4) cells (∅ < 150 µm) and compact [sometimes few and little lacunae in old stems
- ground parenchyma sustained growth : absent (Type A)
- superficial protective layer (sub-epidermal) : suberization and sclerosis of the existing ground parenchyma
- tangential elongation and anticlinal divisions of subcortical parenchyma cells : absent
numerical
- range of slope index (min_m_max) : not described