Digitaria filiformis laeviglumis (Fernald) Wipff

Slender crabgrass, Smooth slender crabgrass



Taxonomy & Nomenclature



Conservation Status

Extinct (Knapp et al., 2021) or Rediscovered (Sánchez-Ken, 2019)

Last record: 1931 (Knapp et al., 2021)


Recently reported from Mexico (Sánchez-Ken, 2018,2019), but the identification has been questioned by (Knapp et al., 2021).



New Hampshire, USA (& Mexico?)


Recently reported from Mexico (Sánchez-Ken, 2018,2019), but the identification has been questioned by (Knapp et al., 2021).


Biology & Ecology










Original scientific description:

Fernald, M. L. (1920). A new Digitaria from New Hampshire. Rhodora 22(258): 102-104.


Other references:

Knapp, Wesley M., Frances, Anne, Noss, Reed, Naczi, Robert F. C., Weakley, Alan, Gann, George D., Baldwin, Bruce G., Miller, James, McIntyre, Patrick, Mishler, Brent D., Moore, Gerry, Olmstead, Richard G., Strong, Anna, Kennedy, Kathryn, Heidel, Bonnie and Gluesenkamp, Daniel. (2021). Vascular plant extinction in the continental United States and Canada. Conservation Biology 35(1): 360-368. [Supporting Information (Appendix S1)]

NHB. (2018). Natural Heritage Bureau. Rare Plants, Rare Animals, and Exemplary Natural Communities in New Hampshire Towns. Division of Forest and Lands. New Hampshire, USA. 189 pp.

Nichols, W. F. and J. Hoy. (2014). A temperate ridge-cliff-talus system in an urban setting: Rock Rimmon in Manchester, New Hampshire. Rhodora 116(965): 85-100.

Sánchez-Ken, J. G. (2018 "2019"). Riqueza de especies, clasificación y listado de las gramíneas (Poaceae) de México. Acta Botanica Mexicana 126: e1379.

Sánchez-Ken, Jorge Gabriel. (2019). New records of Digitaria filiformis var. laeviglumis (Paniceae, Panicoideae, Poaceae) for the Flora del Bajío and Durango, Mexico. Acta Botanica Mexicana 126: e1511.

Smith, James P. Jr. (2017). Rare, Endangered, and Threatened Grasses of the Conterminous United States. Botanical Studies 14: 1-12.

Vega, A. S. and Rúgolo de Agrasar, Z. E. (2005). Novedades taxonómicas y sinopsis del género Digitaria (Poaceae, Panicoideae, Paniceae) en Colombia y Venezuela. Darwiniana, nueva serie 43(1-4): 232-267.

Wipff, J. K. (1996). Nomenclatural combinations in Digitaria (Poaceae: Paniceae). Phytologia 80(5): 348-349.

Wipff, J. K. (2003). Digitaria Haller, pp. 358-383. In: Barkworth, M. E., Capels, K. M., Long, S. and Piep, M. B. (eds.). Flora of North America, Vol. 25 (Magnoliophyta: Commelinidae (in part): Poaceae, part 2). Oxford University Press. New York, USA.


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