By organism › Green plants › Petermanniaceae

Observationobservedoriginal resultmeasured

Claim · model-written summary

Microsporogenesis in Petermannia cirrosa is successive.

Taxon: Petermannia cirrosaPetermannia cirrosat0
Outcome: Microsporogenesis is successivee0

Verbatim

e0
“Microsporogenesis is successive”
✓ located verbatim in the source · abstract, characters 277–308

t0
“Petermannia cirrosa”
✓ located verbatim in the source · title, characters 41–60

Title

Embryology and possible relationships of Petermannia cirrosa (Petermanniaceae)

J. G. Conran Nordic Journal of Botany 1988. doi:10.1111/j.1756-1051.1988.tb01701.x

Other claims from this paper (5)

Observation The endothecium is spirally thickened and the tapetum is binucleate and amoeboid.
Observation Ovules are anatropous and crassinucellate.
Observation A primary parietal cell forms and divides.
Observation Megasporogenesis is of the Polygonum type.
Observation Petermanniaceae shows affinities with Dioscoreales and Geitonoplesiaceae but remains somewhat isolated.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The endothecium is spirally thickened and the tapetum is binucleate and amoeboid.

Taxon: Petermannia cirrosaPetermannia cirrosat0
Outcome: the endothecium is spirally thickened and the tapetum binucleate and amoeboide0

Verbatim

e0
“the endothecium is spirally thickened and the tapetum binucleate and amoeboid”
✓ located verbatim in the source · abstract, characters 310–387

t0
“Petermannia cirrosa”
✓ located verbatim in the source · title, characters 41–60

Title

Embryology and possible relationships of Petermannia cirrosa (Petermanniaceae)

J. G. Conran Nordic Journal of Botany 1988. doi:10.1111/j.1756-1051.1988.tb01701.x

Other claims from this paper (5)

Observation Microsporogenesis in Petermannia cirrosa is successive.
Observation Ovules are anatropous and crassinucellate.
Observation A primary parietal cell forms and divides.
Observation Megasporogenesis is of the Polygonum type.
Observation Petermanniaceae shows affinities with Dioscoreales and Geitonoplesiaceae but remains somewhat isolated.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Ovules are anatropous and crassinucellate.

Taxon: Petermannia cirrosaPetermannia cirrosat0
Outcome: The ovules are anatropous and crassinucellatee0

Verbatim

e0
“The ovules are anatropous and crassinucellate”
✓ located verbatim in the source · abstract, characters 389–434

t0
“Petermannia cirrosa”
✓ located verbatim in the source · title, characters 41–60

Title

Embryology and possible relationships of Petermannia cirrosa (Petermanniaceae)

J. G. Conran Nordic Journal of Botany 1988. doi:10.1111/j.1756-1051.1988.tb01701.x

Other claims from this paper (5)

Observation Microsporogenesis in Petermannia cirrosa is successive.
Observation The endothecium is spirally thickened and the tapetum is binucleate and amoeboid.
Observation A primary parietal cell forms and divides.
Observation Megasporogenesis is of the Polygonum type.
Observation Petermanniaceae shows affinities with Dioscoreales and Geitonoplesiaceae but remains somewhat isolated.

Observationobservedoriginal resultmeasured

Claim · model-written summary

A primary parietal cell forms and divides.

Taxon: Petermannia cirrosaPetermannia cirrosat0
Outcome: A primary parietal cell is formed and dividese0

Verbatim

e0
“A primary parietal cell is formed and divides”
✓ located verbatim in the source · abstract, characters 436–481

t0
“Petermannia cirrosa”
✓ located verbatim in the source · title, characters 41–60

Title

Embryology and possible relationships of Petermannia cirrosa (Petermanniaceae)

J. G. Conran Nordic Journal of Botany 1988. doi:10.1111/j.1756-1051.1988.tb01701.x

Other claims from this paper (5)

Observation Microsporogenesis in Petermannia cirrosa is successive.
Observation The endothecium is spirally thickened and the tapetum is binucleate and amoeboid.
Observation Ovules are anatropous and crassinucellate.
Observation Megasporogenesis is of the Polygonum type.
Observation Petermanniaceae shows affinities with Dioscoreales and Geitonoplesiaceae but remains somewhat isolated.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Megasporogenesis is of the Polygonum type.

Taxon: Petermannia cirrosaPetermannia cirrosat0
Outcome: Megasporogenesis is of the Polygonum typee0

Verbatim

e0
“Megasporogenesis is of the Polygonum type”
✓ located verbatim in the source · abstract, characters 483–524

t0
“Petermannia cirrosa”
✓ located verbatim in the source · title, characters 41–60

Title

Embryology and possible relationships of Petermannia cirrosa (Petermanniaceae)

J. G. Conran Nordic Journal of Botany 1988. doi:10.1111/j.1756-1051.1988.tb01701.x

Other claims from this paper (5)

Observation Microsporogenesis in Petermannia cirrosa is successive.
Observation The endothecium is spirally thickened and the tapetum is binucleate and amoeboid.
Observation Ovules are anatropous and crassinucellate.
Observation A primary parietal cell forms and divides.
Observation Petermanniaceae shows affinities with Dioscoreales and Geitonoplesiaceae but remains somewhat isolated.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Petermanniaceae shows affinities with Dioscoreales and Geitonoplesiaceae but remains somewhat isolated.

Taxon: Petermannia cirrosaPetermannia cirrosat0
Outcome: the Petermanniaceae show affinities with the remainder of the Dioscoreales, and also with the Geitonoplesiaceae (Asparagales) but remain somewhat isolatede0

Verbatim

e0
“the Petermanniaceae show affinities with the remainder of the Dioscoreales, and also with the Geitonoplesiaceae (Asparagales) but remain somewhat isolated”
✓ located verbatim in the source · abstract, characters 570–724

t0
“Petermannia cirrosa”
✓ located verbatim in the source · title, characters 41–60

Title

Embryology and possible relationships of Petermannia cirrosa (Petermanniaceae)

J. G. Conran Nordic Journal of Botany 1988. doi:10.1111/j.1756-1051.1988.tb01701.x

Other claims from this paper (5)

Observation Microsporogenesis in Petermannia cirrosa is successive.
Observation The endothecium is spirally thickened and the tapetum is binucleate and amoeboid.
Observation Ovules are anatropous and crassinucellate.
Observation A primary parietal cell forms and divides.
Observation Megasporogenesis is of the Polygonum type.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Petermannia vascular anatomy differs from that of Dioscorea-ceae, supporting its exclusion from that group.

Taxon: PetermanniaPetermanniae0
Outcome: vascular anatomye0
Comparator: Dioscorea-ceaee0

Not reportedDirection

Verbatim

e0
“This information lends support to the exclusion of Petermannia from the Dioscorea-ceae with which it has been tentatively associated, the vascular anatomy of the two being quite dissimilar.”
✓ located verbatim in the source · abstract, characters 105–294

Title

Notes on the vegetative morphology and anatomy of the Petermanniaceae (Monocotyledones)

P. B. TOMLINSON; E. S. AYENSU Botanical Journal of the Linnean Society 1969. doi:10.1111/j.1095-8339.1969.tb01953.x

Other claims from this paper (3)

Mechanismobservedoriginal resultmeasured

Claim · model-written summary

Sympodial growth cannot explain the leaf-opposed position of Petermannia tendrils.

Taxon: PetermanniaPetermanniat0
Outcome: leaf-opposed position of the tendrilse0
Qualifier: sympodial growthe0

Not reportedDirection

Verbatim

e0
“No satisfactory explanation of the peculiar leaf-opposed position of the tendrils (inflorescence homologues) can be offered, except that it clearly cannot be accounted for by sympodial growth.”
✓ located verbatim in the source · abstract, characters 295–487

t0
“Petermanniaceae”
✓ located verbatim in the source · title, characters 54–69

Title

Notes on the vegetative morphology and anatomy of the Petermanniaceae (Monocotyledones)

P. B. TOMLINSON; E. S. AYENSU Botanical Journal of the Linnean Society 1969. doi:10.1111/j.1095-8339.1969.tb01953.x

Other claims from this paper (3)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Petermannia vascular tissues are very unspecialized.

Taxon: PetermanniaPetermanniae0
Outcome: Vascular tissuese0

Verbatim

e0
“Vascular tissues in Petermannia are very unspecialized.”
✓ located verbatim in the source · abstract, characters 488–543

Title

Notes on the vegetative morphology and anatomy of the Petermanniaceae (Monocotyledones)

P. B. TOMLINSON; E. S. AYENSU Botanical Journal of the Linnean Society 1969. doi:10.1111/j.1095-8339.1969.tb01953.x

Other claims from this paper (3)

Petermanniaceae 9 claims

9 claims