Plant Image Collection

PaleobotanyActions

Media

11-002h Quick view
11-002h

Aglaophyton major (sporangium)

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Rhynia gwynne-vaughani (stem, x.s.)

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Horneophyton lignieri (sporangium, l.s.)

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Baragwanthia

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Asteroxylon mackei (stem, x.s.)

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Lepidodrendron sp. (small stem, x.s.)

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Lepidodrendron sp. (stele, cortex, x.s.)

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Lepidodrendron f. selaginoides (leaf base w/ligule)

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Lepidodrendropsis (leaf cushion)

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Lepidodrendron sp. (early periderm)+B39

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Lepidodrendron sp.

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Sphenophyllum plurifoliatum

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Sphenophyllum sp.

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Calamites (shoot apex)

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Calamites sp.

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Calamites sp.

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Calamites sp.

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Asterophyllites (Calamites leaves)

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Calamostachys binneyana (cone, x.s.)

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Calamostachys linneyana (cone, l.s.)

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Stigmaria (axis, x.s.)

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Heterangium americanum (stem, x.s.)

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Heterangium americanum (secondary xylem & phloem, x.s.)

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Heterangium americanum (phloem parenchyma, 1.s.)

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Heterangium americanum (phloem parenchyma, 1.s.)

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Heterangium americanum (sieve areas)

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Spermatites sp. (seed-like megaspore, 100 X)

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Thomasonia sp. (Lycopod megaspore)

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Minerisporites mirabilis (f. Selaginella)

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Molaspora lobata (megaspore, polar view)

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Molospora lobata (megaspore, lateral view)

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Cluster of Glomus-like chlamydospores occurring in enclosed structures, probable roots

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Section of a petiole of an unidentified plant infected with Synchytrium-like sporangia and zoospores

11-035h Quick view
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Cluster of Glomus-like chlamydospores occurring in enclosed structures, probable roots

11-036h Quick view
11-036h

Section of a petiole of an unidentified plant infected with Synchytrium-like sporangia and zoospores

CA06-003 Quick view
CA06-003

Tree ferns occur throughout the world in predominantly tropical habitats. The group has a long history and is known since the Jurassic, ca. 160 million years ago. Fossils of this family, Cyatheaceae, are usually carbon imprints (called compression fossils) of leaves. Other fossils, such as the stems of tree ferns, are petrified, with the organic plant material mostly replaced by minerals. This image of the indusium of Cyathea cranhamii Smith, Rothwell et Stockey shows sporangia with spores. Spores are triangular with a trilete mark. The sporangia have areas with thickened cell walls (the annulus), which help in dehiscence (the opening of the sporangium) and spore dispersal. Sporangial stalks are visible as small clusters of four to six cells in cross section. Cyathea cranhamii comes from late Cretaceous (ca. 130 million years ago) sediments of British Columbia, Canada and represents the first known permineralized reproductive tree fern material.

11-037 Quick view
11-037

This is a kodachrome of a permineralized leaf fragment of Delnortea (USNM 387477). Taken by John M. Miller using a Nikkormat camera ASA 25 film in sunlight, shortly after collection of the rock sample from the Lower Permian (Leonardian) Road Canyon Formation, Permian Type Section. Later photographs were taken by Sergius H. Mamay, Ph.D., USNM and published as Fig. 15 in the American Journal of Botany 75(9): 1414.

11-038 Quick view
11-038

This is a kodachrome of a permineralized leaf fragment of the largest known fossil leaf of Delnortea (USNM 387473). Taken by John M. Miller, Ph.D. using a Nikkormat camera and ASA 25 film in sunlight, shortly after collection of the rock sample from the Lower Permian (Leonardian) Road Canyon Formation, Permian Type Section. Later photographs were taken by Sergius H. Mamay, Ph.D., USNM and published as Fig. 10 in American Journal of Botany 75(9): 1412.

11-039 Quick view
11-039

This is a kodachrome of a permineralized leaf fragment of Delnortea. The woody midrib, clearly visible on the slide, was used by William E. Stein, Jr., Ph.D. to create the polished thin-sections yielding the first images of a bifacial cambium and conducting xylem and phloem tissue of any Permian gigantopterid; shown as Figs. 23-36 (USNM 372427). Taken by John M. Miller, Ph.D. using a Nikkormat camera and ASA 25 film in sunlight, shortly after collection of the rock sample from the Lower Permian (Leonardian) Road Canyon Formation, Permian Type Section. Later photographs were taken by Sergius H. Mamay, Ph.D., USNM and William E. Stein, Jr., Ph.D. and published in AJB 75(9): 1418, 1420.

abot93-12 Quick view
abot93-12

Three-dimensional reconstruction of the pyritized fossil fruit Palaeorhodomyrtus subangulata (Myrtaceae) from the Lower Eocene London Clay Formation, based on serial sections obtained from high-resolution x-ray computed tomography (HRXCT). Upper image is a volume rendering of a 1.5-mm-thick wedge; specimen is ;10 mm in diameter. Seeds are highlighted in purple. Lower images are volume renderings of seeds with surrounding material made progressively more transparent, revealing three-dimensional seed forms and arrangements. Seeds are approximately 0.4 mm thick. This technique is applicable to many fossil and extant fruits and seeds and provides an excellent means of imaging the three-dimensional structure of rare, type, and figured material in a nondestructive way.

abot94-10 Quick view
abot94-10

A partial inflorescence and two flowers from the Middle Eocene Princeton Chert, British Columbia, Canada, digitally reconstructed from serial sections using the program AMIRA 3.1.1. The raceme (left) represents an immature apical portion of the inflorescence, 2.9 mm long, with bracts (white) and stamens (green) visible. Fossil flowers are only 0.8 mm in diameter, making the use of three-dimensional reconstructions extremely helpful in visualizing the whole flowers. Flowers have a subtending bract (white), no perianth, five stamens (yellow) and four carpels (green). Anatomy, morphology and phylogenetic analysis indicate these fossils are most similar to Saururus (lizard

abot95-08 Quick view
abot95-08

Menispermites cordatus, a new fossil leaf species from the middle–late Paleocene (ca. 60-58 Mya) of the Cerrejón paleoflora, northern Colombia. Leaf morphology and venation patterns are remarkably similar to those of the modern lianas of Menispermaceae. The presence of climbing plants and tall canopy trees in the Cerrejón Paleocene forest suggests that multistratification of Neotropical rain forests is an ancient feature.

For further deat, see: Jaramillo et al.

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Creation and update

Creation
Created by admin on Oct 23, 2013
Last update
Updated by admin on Oct 25, 2013

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