PBDB Collection

Horse Prairie Florule composite (sites 66, 93, 69 ORR) (Miocene of the United States)

Also known as USGS sites 66, 93, and 69

Where: Beaverhead County, Montana (45.0° N, 113.2° W: paleocoordinates 45.7° N, 110.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Miocene (23.0 - 5.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - large; carbonaceous shale

Size class: macrofossils

Preservation: mold/impression, adpression, original carbon

Reposited in the USGS

Collection methods: surface (in situ),

Primary reference: H. F. Becker. 1969. Fossil Plants of the Tertiary Beaverhead Basins in Southwestern Montana. Palaeontographica Abteilung B 127:1-142 [H. Sims/H. Lindon/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 23973: authorized by Hallie Sims, entered by Heather Lindon on 25.07.2002, edited by Summer Ostrowski and Hallie Sims

Creative Commons license: CC BY (attribution)

Taxonomic list

• Becker 1969 gives a composite list for five sites (66, 93, 69, 133, and 70) all within a small area and with fossils collected from "an identical horizon". He only differentiates site 70 because it is particularly sparse (only two taxa) relative to the other sites. He notes that not all the taxa listed occur at all of the remaining sites. Because of this, I've entered Horse Prairie as two collections: one the composite and one for site 70.

Show authors, comments, and common names

unclassified
-	Kerria antiqua Kerria antiqua
Polypodiopsida
- Osmundaceae	Osmunda occidentalis Osmunda occidentalis
Equisetales - Equisetidae	Equisetum arcticum Equisetum arcticum Heer 1866 horsetail
Polypodiales - Polypodiidae	Pteris sp. Pteris sp. Linnaeus 1753
Ginkgoopsida
Ginkgoales - Ginkgoaceae	Ginkgo adiantoides Ginkgo adiantoides Unger 1845 ginkgo
Angiospermae
-	Arundo pseudogoepperti Arundo pseudogoepperti Berry 1914
Rosales - Rosaceae	Vauquelinia coloradensis, Cercocarpus beaannae, Rosa hilliae, Potentilla horkelioides, Potentilla salmonensis Vauquelinia coloradensis rose Cercocarpus beaannae rose Rosa hilliae Lesquereux 1883 rose Potentilla horkelioides cinquefoil Potentilla salmonensis cinquefoil
Rosales - Ulmaceae	Zelkova drymeja, Zelkova oregoniana, Ulmus paucidentata Zelkova drymeja zelkova Zelkova oregoniana zelkova Ulmus paucidentata elm
Rosales - Pomaceae	Crataegus pacifica Crataegus pacifica hawthorn
Rosales - Papilionaceae	Robinia californica Robinia californica Axelrod 1939
Rosales - Mimosaceae	Mimosites acaciafolius, Pithecolobium eocenicum Mimosites acaciafolius Pithecolobium eocenicum Berry 1916
Rosales - Rhamnaceae	Paliurus dumosus, Ceanothus prespinosus, Berchemia huanoides, Colubrina preelliptica, Colubrina cf. asiatica Paliurus dumosus buckthorn Ceanothus prespinosus ceanothus Berchemia huanoides buckthorn Colubrina preelliptica buckthorn Colubrina cf. asiatica buckthorn
Fabales - Fabaceae	Cassia hesperia, Diphysa presuberosa, Dalbergia retusa, Cercis parvifolia Cassia hesperia legume Diphysa presuberosa legume Dalbergia retusa legume Cercis parvifolia Lesquereux 1883 redbud
Malpighiales - Salicaceae	Populus payettensis, Populus balsamoides Populus payettensis poplar Populus balsamoides Göppert 1855 poplar
Celastrales - Celastraceae	Celastrus typicus Celastrus typicus bittersweet
Fagales - Fagaceae	Castanea miomollissima, Fagopsis longifolia, Quercus eoprinus, Quercus hannibali, Quercus winstanleyi, Quercus prelobata, Quercus pseudolyrata Castanea miomollissima chestnut Fagopsis longifolia Lesquereux 1872 Quercus eoprinus oak Quercus hannibali oak Quercus winstanleyi oak Quercus prelobata Condit 1944 oak Quercus pseudolyrata Lesquereux 1878 oak
Fagales - Juglandaceae	Carya libbeyi Carya libbeyi hickory
Fagales - Myricaceae	Myrica serrulata Myrica serrulata bayberry
Fagales - Betulaceae	Carpinus fraterna, Betula vera, Betula fairii, Ostrya oregoniana Carpinus fraterna Lesquereux 1883 hornbeam Betula vera birch Betula fairii Knowlton 1926 birch Ostrya oregoniana hophornbeam
Malvales - Malvaceae	Sterculia wilcoxiana Sterculia wilcoxiana tropical chestnut
Malvales - Tiliaceae	Tilia aspera Tilia aspera linden
Sapindales - Meliaceae	Cedrela lancifolia, Cedrela pteraformis Cedrela lancifolia mahogany Cedrela pteraformis mahogany
Sapindales - Sapindaceae	Acer glabroides, Cardiospermum terminalis, Sapindus coloradensis Acer glabroides Brown 1937 maple Cardiospermum terminalis soapberry Sapindus coloradensis Cockerell 1908 soapnut
Sapindales - Simaroubaceae	Ailanthus americana Ailanthus americana Cockerell 1908
Sapindales - Anacardiaceae	Astronium truncatum Astronium truncatum cashew
Sapindales - Rutaceae	Ptelea miocenica Ptelea miocenica hoptree
Laurales - Lauraceae	Sassafras columbiana Sassafras columbiana sassafras
Proteales - Nelumbonaceae	Nelumbo sp. Nelumbo sp. Adanson 1763 lotus
Proteales - Platanaceae	Platanus stenoloba, Platanus dissecta Platanus stenoloba plane tree Platanus dissecta Lesquereux 1878 plane tree
Cornales - Cornaceae	Cornus cornella Cornus cornella dogwood
Garryales - Eucommiaceae	Eucommia montana Eucommia montana
Lamiales - Oleaceae	Osmanthus praemissa, Fraxinus flexifolia, Fraxinus rupinarum Osmanthus praemissa Lesquereux 1883 Fraxinus flexifolia ash Fraxinus rupinarum ash
Saxifragales - Cercidiphyllaceae	Cercidiphyllum arcticum Cercidiphyllum arcticum katsura
Ranunculales - Berberidaceae	Mahonia hakeaeformis, Mahonia limirivuli, Mahonia reticulata, Mahonia simplex, Mahonia lobodonta Mahonia hakeaeformis barberry Mahonia limirivuli barberry Mahonia reticulata barberry Mahonia simplex barberry Mahonia lobodonta Becker 1959 barberry
Ranunculales - Menispermaceae	Cocculus heteromorpha Cocculus heteromorpha
Liliales - Smilacaceae	Smilax trinervis Smilax trinervis greenbrier
Poales - Typhaceae	Typha lesquereuxi Typha lesquereuxi Cockerell 1908 bulrush
Poales - Poaceae	Phragmites alaskana, Poacites "sp. 1", Poacites "sp. 2" Phragmites alaskana Heer 1869 common reed Poacites "sp. 1" Brongniart 1822 grass Poacites "sp. 2" Brongniart 1822 grass
Zingiberales - Cannaceae	Canna flaccidafolia Canna flaccidafolia
Dicotyledoneae
Ericales - Ebenaceae	Diospyros oregoniana Diospyros oregoniana
Angiospermae
Nymphaeales - Nymphaeaceae	Nymphaeites nevadensis, Nuphar advenoides Nymphaeites nevadensis Brown 1938 water lily Nuphar advenoides water lily
Pinopsida
Pinales - Pinaceae	Abies alvordensis, Abies laticarpa, Abies concoloroides, Pseudolarix americana, Pinus florissanti, Pinus wheeleri, Pseudotsuga longifolia, Pseudotsuga sonomensis, Picea lahontensis, Picea magna, Picea sonomensis Abies alvordensis fir Abies laticarpa fir Abies concoloroides Brown 1940 fir Pseudolarix americana Pinus florissanti Lesquereux 1883 pine Pinus wheeleri Cockerell 1908 pine Pseudotsuga longifolia Pseudotsuga sonomensis Picea lahontensis spruce Picea magna spruce Picea sonomensis spruce

Coniferales - Cupressaceae	Glyptostrobus oregonensis, Metasequoia occidentalis, Sequoia affinis, Chamaecyparis linguaefolia, Juniperus nevadensis Glyptostrobus oregonensis Chinese swamp cypress Metasequoia occidentalis Chaney 1951 dawn redwood Sequoia affinis Lesquereux 1876 coast redwood Chamaecyparis linguaefolia cypress Juniperus nevadensis juniper