scholarly journals Physalis macrophysa (Solanaceae: Physalinae: subgenus Rydbergis), its taxonomic disposition and relation to other material with large inflated fruiting calyces

2019 ◽  
Vol 13 (1) ◽  
pp. 51-61
Author(s):  
Milo Pyne ◽  
Steve L. Orzell ◽  
Edwin L. Bridges
Keyword(s):  
United States ◽  
Coastal Plain ◽  
Taxonomic Status ◽  
The United States ◽  
Glandular Hair ◽  
Gulf Coastal Plain ◽  
The West

Examination of the lectotype and isotype material of Physalis macrophysa Rydb. show its compatibility with P. longifolia, having nearly glabrous, ovate-lanceolate to broadly lanceolate leaves, and the presence of short, simple antrorse hairs on the petioles and pedicels. Other than its large inflated fruiting calyces (3.0–4.0 cm × 2.5–3.0 cm), it has little in common morphologically with another large inflated calyced Physalis macrosperma which is endemic to deep sands from a portion of the West Gulf Coastal Plain of the United States. Instead, P. longifolia has stems and pedicles that are either nearly glabrous or with antrorse, appressed, non-glandular hair and ovate-lanceolate leaves versus short glandular and non-glandular, spreading, upright hair and cordate to truncate leaves in the aforementioned Physalis macrosperma. We agree with previous authors that P. macrophysa Rydb., if meriting taxonomic status, should be treated as P. longifolia var. subglabrata (Mack. & Bush) Cronquist forma macrophysa (Rydb.) Steyermark or, alternatively, it may simply represent variation within P. longifolia not deserving of any taxonomic status.

New mud turtles (Kinosternidae,Kinosternon) from the middle–late Miocene of the United States

2015 ◽  
Vol 89 (5) ◽  
pp. 821-844 ◽  
Author(s):  
Jason R. Bourque
Keyword(s):  
United States ◽  
Great Plains ◽  
Late Miocene ◽  
Coastal Plain ◽  
Middle Miocene ◽  
The United States ◽  
Gulf Coastal Plain ◽  
North Central ◽  
South Central ◽  
Kinosternon Subrubrum

AbstractKinosternonSpix, 1824, was widespread in xeric to savanna associated paleowetlands across North America during the middle–late Miocene and steadily diversified following its first occurrences in the Hemingfordian. In the middle Miocene,Kinosternon rinconn. sp. occurred in the late Barstovian Cerro Conejo Formation of north central New Mexico, perhaps concurrently withKinosternon pojoaqueBourque 2012a from the Tesuque Formation. Subsequent late Miocene kinosternine fossils indicate that at least three potentially contemporaneous species existed throughout the Clarendonian. These areKinosternon pannekollopsn. sp., from the Ogallala Formation of northern Texas;Kinosternon wakeeniense, n. sp., from the Ogallala Formation of northwestern Kansas and Ash Hollow Formation of south-central Nebraska; andKinosternon notolophusn. sp., from the Alachua and Statenville formations of northern Florida.Kinosternon rinconis phylogenetically nested between theKinosternon flavescens(Agassiz, 1857) group (=PlatythyraAgassiz, 1857) and more derivedKinosternonincluding theKinosternon subrubrum(Lacépède, 1788) group (=ThyrosternumAgassiz, 1857).Kinosternon pannekollopsis recovered on the stem of theK.subrubrumgroup and is the oldest and largest member of that lineage.Kinosternon notolophusis readily differentiated from other MioceneKinosternonin possessing a distinct dorsomedial keel on the nuchal and faint dorsolateral costal carination. TheK.subrubrumgroup probably originated in the late Miocene savannas of the Great Plains and dispersed eastward via the Gulf Coastal Plain. An unnamed kinosternine taxon existed in the coastal plains of the eastern and southeastern United States during the Middle Miocene Climatic Optimum (with fossils from ~18 to 15 Ma), and disappeared from the region coincident with the end of that megathermal event.

scholarly journals A New Site Index Model for Intensively Managed Loblolly Pine (Pinus taeda) Plantations in the West Gulf Coastal Plain

2019 ◽  
Author(s):  
Kynda R Trim ◽  
Dean W Coble ◽  
Yuhui Weng ◽  
Jeremy P Stovall ◽  
I-Kuai Hung
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Coastal Plain ◽  
Site Index ◽  
The United States ◽  
Pine Plantations ◽  
Permanent Plots ◽  
Gulf Coastal Plain ◽  
The West ◽  
Intensively Managed

Abstract Site index (SI) estimation for loblolly pine (Pinus taeda L.) plantations is important for the successful management of this important commercial tree species in the West Gulf Coastal Plain of the United States. This study evaluated various SI models for intensively managed loblolly plantations in the West Gulf Coastal Plain using data collected from permanent plots installed in intensively managed loblolly pine plantations across east Texas and western Louisiana. Six commonly used SI models (Cieszewski GADA model, both Chapman-Richards ADA and GADA models, both Schumacher ADA and GADA models, and McDill-Amateis GADA model) were fit to the data and compared. The Chapman-Richards GADA model and the McDill-Amateis GADA model were similar and best in their fit statistics. These two models were further compared to the existing models (Diéguez-Aranda et al. 2006 (DA2006), Coble and Lee 2010 (CL2010)) commonly used in the region. Both the Chapman-Richards GADA and the McDill-Amateis GADA models consistently predicted greater heights up to age 25 than the models of DA2006 and CL2010, with larger height differences for the higher quality sites, but predicted shorter heights thereafter. Ultimately, the McDill-Amateis GADA model was chosen as the best model for its consistency in predicting reasonable heights extrapolated beyond the range of the data. Foresters can use this model to make more informed silvicultural prescriptions for intensively managed loblolly pine plantations in the West Gulf Coastal Plain.

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