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Alexander Krings

Associate Professor and Director of the Vascular Plant Herbarium

Faculty

Gardner Hall 2109

919.515.2700

http://herbarium.ncsu.edu

Area(s) of Expertise

Plant Taxonomy and Conservation Biology

Work in my lab seeks to contribute to conservation and sustainable natural resource management through fundamental and applied research.  Our work spans several disciplines, including historical ecology, dendrochronology, floristics/taxonomy, and silviculture.  Some of this work is rather recent and so has not made it into the literature yet. In collaboration with colleagues, we are also active in studies of pollination biology and population genetics of rare species.  As an extension contribution, we also develop applied resources that facilitate plant identification at local and regional scales.

In addition to research and extension, I currently serve as an editor for Castanea and Novon, as well as the taxon editor for the Apocynaceae for the Flora of North America.  I served on the NCDA & CS Plant Conservation Program Scientific Committee for about a decade and am currently serving on the Plant Conservation Program Board.

I welcome students interested in pursuing graduate degrees particularly in plant ecology/conservation or floristics. Our program has a rich history of contributing to the knowledge of the flora of the Southeast through ecological studies and floristic inventories undertaken as M.S. theses. Students interested in pursuing careers with environmental consultancies, non-governmental organizations like The Nature Conservancy, state agencies, or natural heritage programs have been well placed with such experience.

Selected Publications:

Books and book-length monographs:

Stanley, J.S., A. Krings, J.M. Stucky, and R.R. Braham. 2019. Guide to the vascular flora of Picture Creek Diabase Barrens (Granville County, North Carolina, U.S.A.). Botanical Miscellany Series 51. Botanical Institute of Texas Press, Ft. Worth [more info]

Clark, R.K., A. Krings, J.M. Stucky, and H.J. Kleiss. 2016. Guide to the vascular flora of Kitty Hawk Woods (Dare County, North Carolina, U.S.A.).  Botanical Miscellany Series 45. Botanical Research Institute of Texas Press, Ft. Worth. [more info]

Howell, N., A. Krings, and R.R. Braham. 2016. Guide to the littoral zone vascular flora of Carolina bay lakes (U.S.A.). Biodiversity Data Journal 4: 1-308. doi: 10.3897/BDJ.4.e7964 [View article]

Hines, K.M., A. Krings, and J.M. Stucky. 2015. Guide to the vascular flora of Howell Woods (Johnston County, North Carolina, U.S.A.).  Botanical Miscellany Series 43. Botanical Research Institute of Texas Press, Ft. Worth. [more info]

Thornhill, R., A. Krings, D. Lindbo, and J. Stucky. 2014. Guide to the vascular flora of the savannas and flatwoods of Shaken Creek Preserve and vicinity (Pender & Onslow counties, North Carolina, U.S.A.). Biodiversity Data Journal 2: 1-422. doi: 10.3897/BDJ.2.e1099. [View article]

Krings, A. 2010. Manual of the vascular flora of Nags Head Woods, Outer Banks, North Carolina. Memoirs of the New York Botanical Garden 103. New York Botanical Garden Press, New York. [more info]

Krings, A. and R.R. Braham. 2005. Guide to tendrillate climbers of Costa Rican mountains. Blackwell Publishing, Ames. [read a review] [more info]

Chapters:

Krings, A. Accepted. Parkinsonia (Fabaceae). In:Legumes of Arizona. Boyce Thompson Arboretum and University of Arizona.

CD-ROMs:

Kirchoff, B., S. Baskauf, A. Krings, B. Purcell, and J. Cox. 2008. Woody plants of the southeastern U.S.: A field course on CD. Missouri Botanical Garden Press, St. Louis. [ISBN 978-1-930723-62-7] [more info]

Web and mobile apps:

Trees of North Carolina Working Group. 2014-present. Trees of North Carolina. Version 1.0. North Carolina State University, Raleigh.

Container Nursery Weed Research Group. 2012. Weeds of container nurseries in the United States. Version 2.0. North Carolina State University, Raleigh.

Hardin, J.W., C.F. Brownie, and A. Krings. 2018–present. Plants poisonous to livestock and pets in North Carolina, 2.0.  North Carolina State University, Raleigh.

Krings, A. 2017–present. Common ferns of North Carolina.  Version 1.0. North Carolina State University, Raleigh.

Krings, A., M. Hamilton, and D. Wylie. 2018–present. Polyclave: Dichanthelium of Picture Creek Diabase Barrens.  North Carolina State University, Raleigh.

Krings, A., S. Goyette, D. Suiter, and M. Samuels. 2012–present. Rare plants of North Carolina: Federally listed species and their congeners. Version 1.0. North Carolina State University, Raleigh.

Samuels, M. and A. Krings. 2012–present. Pitcher perfect! Identifying pitcher plants in North Carolina.Version 1.0. North Carolina State University, Raleigh.

Stucky, J. and A. Krings. 2012-present. Winter twig keys to common, native, fully deciduous, trees and phanerophyte shrubs of the North Carolina eastern Piedmont.Version 1.0. North Carolina State University, Raleigh.

Saville, A.C., A. Krings, T. Kahn, M.D. Trice, A.J. Redford. 2011. Citrus ID, Edition 2. USDA APHIS PPQ CPHST, Fort Collins and North Carolina State University. [Android app (released 2013); iOs app(released 2014)]

Online resources:

Agarwal, P., B.K. Kirchoff, and A. Krings. 2015. ImageSort Creator. North Carolina State University and Metis Learning.

Krings, A. 2018-present. Extension Gardener – Botany exercises. North Carolina State University, Raleigh.

Krings, A., P. Agarwal, and B.K. Kirchoff. 2014-present. Image Sort Visual Learning. North Carolina State University and Metis Learning.

Saville, A.C., A. Krings, and T. Kahn. 2011. Hosts and potential hosts of Citrus pests and diseases in the United States. USDA-APHIS-PPQ-CPHST, Ft. Collins.

Publications in peer-reviewed journals (selected):

Ecology

Porter, K.M., C.S. DePerno, A. Krings, M. Krachey, and R. Braham. 2014. Vegetative impact of feral horses, feral pigs, and white-tailed deer on the Currituck National Wildlife Refuge, North Carolina. Castanea 79: 8-17.

Unks, R.R., T.H. Shear, A. Krings, and R.R. Braham. 2014. Environmental controls of reproduction and early growth of Lindera melissifolia (Lauraceae). Castanea 79: 266-277.

Krings, A. 2000. Floristics and ecology of Mesoamerican montane climber communities: Monteverde, Costa Rica. Selbyana 21 (1,2): 156–164.

Krings, A. 1999. Observations on the pollination biology and flowering phenology of Texan Matelea reticulata (Engelm. ex A. Gray) Woods. (Asclepiadaceae). Madroño 46(3): 155–158.

Taxonomy

Krings, A. and G. Morillo. 2015. A new species in the Matelea palustris complex (Apocynaceae, Asclepiadeae) and a synopsis of the complex in the Guianas and Northern Brazil. Systematic Botany 40: 214-219.

Krings, A. and G. Morillo. 2012. Matelea sanojana (Apocynaceae, Asclepiadoideae), a new species in the Matelea squiresii complex from Venezuela. Systematic Botany 37: 992-994.

Krings, A. and G. Morillo. 2012. Two new species in the Matelea stenopetala complex (Apocynaceae, Asclepiadoideae) from the Guiana Shield and Amazonian Brazil. PhytoKeys 17: 27-39. [View article]

Krings, A. 2011. Matelea s.l. (Apocynaceae, Asclepiadoideae) in the West Indies. Systematic Botany 36: 730–756.

Krings, A. 2008. Revision of Gonolobus s.s. (Apocynaceae, Asclepiadoideae) in the West Indies. J. Bot. Res. Inst. Texas 2: 95–138. [View article]

Krings, A., D.T. Thomas, and Q.-Y. (J.) Xiang. 2008. On the generic circumscription of Gonolobus (Apocynaceae, Asclepiadoideae): Evidence from molecules and morphology. Systematic Botany 33: 403–415.

Floristics (see also books/monographs above)

Smith, S. and A. Krings. 2018. Euphorbia heterophylla (Euphorbiaceae) in South Carolina, North Carolina, and Virginia, U.S.A. J. Bot. Res. Inst. Texas 12: 369–372.

Krings, A., S. Newton, and N.P. Liles. 2017. Hydrocotyle bowlesioides (Araliaceae): New to the flora of North Carolina. Castanea 82: 47.

Thornhill, R.W. and A. Krings. 2012. Discovery of Hydrocotyle bowlesioides (Araliaceae) in Louisiana. J. Bot. Res. Inst. Texas 6: 283-285. [View article]

Krings, A. 2011. Pistacia chinensis (Anacardiaceae) naturalized in North Carolina, U.S.A. J. Bot. Res. Inst. Texas 5: 867–869. [View article]

Post, A.R., J.C. Neal, A. Krings, B.R. Sosinkski, and Q.-Y. Xiang.  2009.  New Zealand bittercress (Cardamine corymbosa; Brassicaceae): New to the United States.  Weed Technology 23: 604–607.

Krings, A. and R.J. Richardson. 2006. Cayratia japonica (Vitaceae) new to North Carolina and an updated key to the genera of Vitaceae in the Carolinas. Sida 22: 813–815. [View article]

Krings, A., F. Areces Berazaín, and J.C. Lazcano Lara. 2005. New and rediscovered milkweeds from Cuba: Calotropis gigantea and Gonolobus stephanotrichus (Apocynaceae – Asclepiadoideae). Willdenowia 35: 315–318.

Krings, A., A.S. Weakley, J.C. Neal, and E.C. Swab. 2005. Ranunculus ficaria (Ranunculaceae) new to North Carolina and an updated key to Carolina congeners. Sida 21: 2429–2437. [View article]

Krings, A., M.G. Burton, and A.C. York. 2002. Commelina benghalensis (Commelinaceae) new to North Carolina and an updated key to Carolina congeners. Sida 20 (1): 419–422.

Krings, A., R. Westbrooks, and J. Lloyd. 2002. Cirsium nuttallii (Asteraceae: Cynareae): New to North Carolina and an illustrated key to southeastern congeners. Sida 20 (2): 845–848.

Krings, A. and J.C. Neal. 2001. A Scutellaria (Lamiaceae) new to North Carolina and a key to the small-flowered Carolina congeners. Sida 19 (3): 735–739.

Biogeography

Krings, A. 2000. A phytogeographical characterization of the vine flora of the Sonoran and Chihuahuan deserts. J. Biogeography 27 (6): 1311–1319.