Studies in the Quercus Undulata Complex. Iii. The Contribution of Q. Arizonica

Tucker, John M.

doi:10.1002/j.1537-2197.1963.tb12245.x

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…The Quercus undulata complex involves hybridization of up to seven species of oak, with Quercus gambelii being a common contributor to the hybrid complex. Oak on the study area appears to be a hybrid between Quercus gambelii and Quercus muehlenbergii (Tucker 1961(Tucker , 1963Tucker and others 1961).…”

Section: Introductionmentioning

confidence: 76%

Proceedings - pinyon-juniper conference; 1986 January 13-16; Reno, NV

Everett¹

1987

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FOREWORDThe Pinyon and Juniper Woodland Formation occurs over large acreages from Mexico to Canada and from California to Texas. The vegetation type is poorly understood, inadequately defined, and often misused. Significant management problems are identifying and classifying woodland sites, understanding woodland ecology, and proper management for sustained resource productivity. Land managers and scientists alike recognized the need to improve our understanding of woodlands and their management.An interagency steering committee was formed to develop a state-of-the-art management guide for woodlands. The approach selected was to hold a West-wide pinyon and juniper conference to gather the required information, develop a management guide from the conference papers, and hold field workshops utilizing the management guide. To that end, this conference proceedings brings together current research and management perspectives on pinyon and juniper woodlands. Session topics were selected by the steering committee to provide the required scientific and management base for practical and ecologically sound management guidelines. Session chairmen selected by the committee solicited the speakers for their own sessions as they saw fit. The success of the conference was largely due to the efforts of the session chairmen and their invited speakers.This proceedings provides information on woodland paleobotany, inventory and classification, synecology, silvics and silviculture, fire response, economics, plant-water relations, woodland conversion, range management, wildlife, woodland hydrology, and nutrient cycling. Paleobotany papers provide us with a perspective of where we are now in relation to the previous natural expansion, contraction, and movement of the Pinyon and Juniper Woodland Formation independent of human influence. Several general session papers allow us to evaluate the current human role in the woodland ecosystem. Inventory and classification provide a reference point to evaluate the current extent of the resource and its varying productivity potentials. Papers on synecology, fire response, and silvics provide insight into woodland successional processes and stand development, Woodland conversion, wildlife, range management, silviculture, and economic papers evaluate management alternatives and the required inputs for utilizing and maintaining wood and forage resources. The nutrient cycling papers define biotic and abiotic nutrient pools and the cycling processes in natural and disturbed systems. Woodland hydrology and plant-water relation papers discuss hydrologic models, water harvesting, the erosion process, and water use by trees and competing species.Much information was provided by the conference. Difficult questions were asked by Native Americans about current overuse of woodland resources. Our own watchdog scientists asked us to be careful to separate fact from fable in the scientific literature.A well-deserved thank you is extended to the interagency steering committee:

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Section: Introductionmentioning

confidence: 76%

Proceedings - pinyon-juniper conference; 1986 January 13-16; Reno, NV

Everett¹

1987

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Studies in the Quercus Undulata Complex. V. The Type of Quercus Undulata

Tucker

1971

American J of Botany

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The original material of Quercus undulata Torr. was collected by Edwin James on Major Long's expedition to the Rockies in 1820. The type locality was stated by Torrey as “sources of the Canadian and the Rocky Mountains.” Evidence is here adduced that the type locality is on Ute Creek, a tributary of the Canadian River, in northeastern New Mexico. The site was found to harbor Q, gambelii, Q. grisea, and numerous intermediate hybrid forms. Certain of the latter match the type of Q. undulata quite closely. The type sheet includes three elements—a branchlet regarded as the type, a twig of Q. grisea, and an isolated acorn of Q. havardii. Torrey's new species was illustrated by a figure which does not closely resemble the type, but which is more similar to Q. havardii. The acorn of Q. havardii on the type sheet must have been collected in the Texas Panhandle or western Oklahoma, where Long's party would have encountered this species. In my opinion, Torrey's figure could have been drawn from a specimen collected there, which, except for the isolated acorn, has since been lost.

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Systematik und Evolution der Spermatophyta

Ehrendorfer¹

1965

Fortschritte Der Botanik

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Studies in the Quercus Undulata Complex. Iii. The Contribution of Q. Arizonica

Cited by 6 publications

References 21 publications

Proceedings - pinyon-juniper conference; 1986 January 13-16; Reno, NV

Proceedings - pinyon-juniper conference; 1986 January 13-16; Reno, NV

Studies in the Quercus Undulata Complex. V. The Type of Quercus Undulata

Systematik und Evolution der Spermatophyta

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