Home/Species/ Howell's Quillwort

Isoetes howellii

Engelm.

Howell's Quillwort

GNRUnranked Found in 1 roadless area NatureServe Explorer →

GNRUnrankedGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.1216105

Element CodePPISO011B0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicoccurs (regularly, as a native taxon) in multiple nations

KingdomPlantae

PhylumLycophyta

ClassIsoetopsida

OrderIsoetales

FamilyIsoetaceae

GenusIsoetes

Concept Reference

Taylor, W.C., N.T. Luebke, and A.R. Lekschas. 2003. Taxonomic status and evolutionary relationship of Isoetes minima A.A. Eaton (Isoetaceae) based on nuclear ribosomal DNA internal transcribed spacer sequences. Botanical Electronic News 304. Accessed online (January 2015): http://bomi.ou.edu/ben/ben304.html.

Taxonomic Comments

This record is for the narrow treatment of Isoetes howellii, excluding I. minima which is included in I. howellii by FNA (1993, vol. 2) and Kartesz (1994 and 1999). According to Taylor et al. (2003), chromosome counts, DNA analyses, and field characters support the recognition of I. minima as a distinct species, more closely related to I. nuttallii and I. orcuttii than to I. howellii.

Ecology & Habitat

Other Nations (2)

CanadaN3

Province	Rank	Native
British Columbia	S3	Yes

United StatesN4

Province	Rank	Native
Idaho	SNR	Yes
Oregon	SNR	Yes
Utah	S1	Yes
Montana	S3	Yes
Washington	SNR	Yes
California	SNR	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (1)

California (1)

Area	Forest	Acres
East Beegum	Shasta-Trinity National Forest	8,425

References (4)

Flora of North America Editorial Committee (FNA). 1993a. Flora of North America north of Mexico. Vol. 2. Pteridophytes and gymnosperms. Oxford Univ. Press, New York. xvi + 475 pp.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
Taylor, W.C., N.T. Luebke, and A.R. Lekschas. 2003. Taxonomic status and evolutionary relationship of Isoetes minima A.A. Eaton (Isoetaceae) based on nuclear ribosomal DNA internal transcribed spacer sequences. Botanical Electronic News 304. Accessed online (January 2015): http://bomi.ou.edu/ben/ben304.html.