PBDB Collection

Yellowstone River, half a mile below mouth of Elk Creek (Eocene of the United States)

Where: Wyoming (44.0° N, 110.0° W: paleocoordinates 46.8° N, 98.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sepulcher Formation, Middle Eocene (47.8 - 37.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Preservation: mold/impression, adpression, original carbon

Collection methods: surface (in situ),

Primary reference: F. H. Knowlton. 1899. Fossil Flora of the Yellowstone National Park. USGS Monograph Series 32(2) [H. Sims/H. Lindon/H. Lindon]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24087: authorized by Hallie Sims, entered by Heather Lindon on 30.07.2002, edited by Jason Cassara

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Polypodiopsida
Equisetales - Equisetidae	Equisetum canaliculatum, Equisetum deciduum Equisetum canaliculatum Knowlton 1899 horsetail Knowlton Equisetum deciduum Knowlton 1899 horsetail Knowlton
Polypodiales - Polypodiidae	Asplenium magnum, Asplenium remotidens, Asplenium iddingsi Asplenium magnum Knowlton 1899 Knowlton Asplenium remotidens Knowlton 1899 Knowlton Asplenium iddingsi Knowlton 1899 Knowlton
Schizaeales - Polypodiidae	Lygodium kaulfussi Lygodium kaulfussi Heer climbing fern Heer (Cherry Creek, Oregon, Rare)
Mciveraephyllum nebrascense
-	"Cornus newberryi" = Mciveraephyllum nebrascense "Cornus newberryi" = Mciveraephyllum nebrascense Schimper 1874 Hollick
Carpites
-	Carpites pedunculatus Carpites pedunculatus Knowlton 1899 Knowlton
Angiospermae
Typhales - Commelinidae	Sparganium stygium Sparganium stygium Heer 1855 bur-reed Heer
Rosales - Ulmaceae	Ulmus sp., Ulmus ? rhamnifolia Ulmus sp. Linnaeus 1753 elm fruits Ulmus ? rhamnifolia Ward 1885 elm Ward
Rosales - Rhamnaceae	Zizyphus serrulatus Zizyphus serrulatus Ward 1885 buckthorn Ward
Malpighiales - Salicaceae	Populus glandulifera, Populus speciosa, Populus daphnogenoides, Populus xantholithensis Populus glandulifera Heer 1856 poplar Heer Populus speciosa Ward 1885 poplar Ward Populus daphnogenoides Ward 1885 poplar Ward Populus xantholithensis Knowlton 1899 poplar Knowlton
Oxalidales - Oxalidaceae	"Sapindus affinis" = Averrhoites affinis "Sapindus affinis" = Averrhoites affinis Newberry 1868 wood sorrel Newby
Celastrales - Celastraceae	Celastrus culveri, Celastrus inaequalis, Celastrus ellipticus Celastrus culveri Knowlton 1899 bittersweet Knowlton Celastrus inaequalis Knowlton 1899 bittersweet Knowlton Celastrus ellipticus Knowlton 1899 bittersweet Knowlton
Fagales - Fagaceae	Castanea pulchella, Quercus sp., ? Quercus magnifolia, Quercus olafseni, Quercus ? consimilis, Quercus culveri, Quercus hesperia, Fagus antipofii Castanea pulchella Knowlton 1899 chestnut Knowlton Quercus sp. Linnaeus 1753 oak Knowlton. This is a fragment of the base of what appears to have been a large, thick leaf. ? Quercus magnifolia Knowlton 1899 oak Knowlton Quercus olafseni Heer 1868 oak Heer Quercus ? consimilis Newberry 1883 oak Newby. This is only a fragment of the base of a leaf. It does not agree absolutely with the figures of lesquereux, but rather than make it a new species, I have referred it provisionally as above Quercus culveri Knowlton 1899 oak Knowlton Quercus hesperia Knowlton 1899 oak Knowlton Fagus antipofii Abich 1858 beech Abich. Identified by Lesquereux but not since observed
Fagales - Juglandaceae	Hicoria culveri Hicoria culveri Knowlton 1899 Knowlton
Fagales - Myricaceae	Myrica scottii Myrica scottii Lesquereux 1883 bayberry Lesquereux
Fagales - Betulaceae	Betula iddingsi Betula iddingsi Knowlton 1899 birch Knowlton
Malvales - Tiliaceae	Tilia populifolia Tilia populifolia Lesquereux 1883 linden Lesquereux
Sapindales - Sapindaceae	"? Sapindus alatus" = Sapindus glendivensis, Sapindus wardii, Sapindus grandifoliolus "? Sapindus alatus" = Sapindus glendivensis Knowlton 1919 soapnut Ward Sapindus wardii Knowlton 1899 soapnut Knowlton Sapindus grandifoliolus Ward 1885 soapnut Ward, Also on the Thunderer
Rosids - Moraceae	Ficus sp., Ficus asiminaefolia, Ficus deformata, Ficus densifolia, ? Artocarpus quercoides Ficus sp. Linnaeus 1753 fig Knowlton Ficus asiminaefolia Lesquereux 1883 fig Lesquereux Ficus deformata Knowlton 1899 fig Knowlton Ficus densifolia Knowlton 1899 fig Knowlton ? Artocarpus quercoides Knowlton 1899 mulberry Knowlton
Magnoliales - Magnoliaceae	? Magnolia pollardi ? Magnolia pollardi Knowlton 1899 magnolia Knowlton
Laurales - Lauraceae	Laurus montana, Laurus ? primigenia, Laurus princeps, Malapoenna lamarensis Laurus montana Knowlton 1899 laurel Knowlton Laurus ? primigenia Unger 1850 laurel Ung. Laurus princeps Heer 1856 laurel Heer Malapoenna lamarensis Knowlton 1899 laurel Knowlton
Proteales - Platanaceae	? Credneria pachyphylla ? Credneria pachyphylla Knowlton 1899 Knowlton
Lamiales - Oleaceae	Fraxinus wrightii Fraxinus wrightii Knowlton 1899 ash Knowlton
Apiales - Araliaceae	Aralia serrulata, Aralia notata Aralia serrulata Knowlton 1899 spikenard Knowlton Aralia notata Lesquereux 1878 spikenard Lesquereux
Poales - Cyperaceae	Cyperacites angustior, Cyperacites giganteus Cyperacites angustior Schimper 1870 sedge Al. Br. (Miocene; Elk Creek; Lx.) This species was identifed by lesquereux, but the material can not now be found Cyperacites giganteus Knowlton 1899 sedge Knowlton
Dicotyledoneae
Ericales - Ebenaceae	Diospyros haguei Diospyros haguei Knowlton 1899 Knowlton
Ericales - Ericaceae	Arctostaphylos elliptica Arctostaphylos elliptica Knowlton 1899 heather Knowlton

Coniferales - Cupressaceae	Sequoia langsdorfii Sequoia langsdorfii Heer 1877 coast redwood (Brgt.) Heer
Carpolithes
-	Carpolithes osseus Carpolithes osseus Lesquereux 1873 Lesquereux. A very doubtful species, of which the type is lost and the species not since obtained.