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Isoetes nuttallii

Higher Taxonomy
Family: IsoetaceaeView Description 

Common Name: QUILLWORT FAMILY
Habit: Perennial herb, aquatic to terrestrial. Stem: buried, corm-like, 2--3-lobed, corky, brown. Leaf: simple, in grass-like tufts, spirally arranged on stem top, erect to spreading, < 30 cm, linear above base.
Genera In Family: 1 genus, 200+ species: worldwide.
eFlora Treatment Author: W. Carl Taylor & Jon E. Keeley
Scientific Editor: Alan R. Smith, Thomas J. Rosatti.
Genus: IsoetesView DescriptionDichotomous Key

Common Name: QUILLWORT

Etymology: (Greek: evergreen, from habit of some species) Note: Perhaps most poorly known lycophyte genus. Mature female spores, found in decaying leaf bases or soil, critical for identification, as are hand lens for texture when dry, microscope with micrometer for size. Hybrids (spores of variable size, shape) common between aquatic species, making them less distinct.

Isoetes nuttallii Engelm.
NATIVE
Habit: Plant terrestrial. Leaf: deciduous, generally > 8 cm, > 1 mm wide at middle, rigid, +- brittle, tapered to tip, light green to gray-green; base white to +- brown, outermost sterile, often surrounded by several black scales. Chromosomes: 2n=22.
Ecology: Seasonally wet soil, temporary streams; Elevation: generally < 1500(2760) m. Bioregional Distribution: NCoR, CaR, SN, ScV, n SnJV, CW (exc SCoRI), SCo, PR, w MP; Distribution Outside California: to British Columbia. Note: Spores mature late spring, summer.
Unabridged Note: Expanded author citation: Isoetes nuttallii A. Braun ex Engelm.
eFlora Treatment Author: W. Carl Taylor & Jon E. Keeley
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botanical illustration including Isoetes nuttallii

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Citation for this treatment: W. Carl Taylor & Jon E. Keeley 2016. Isoetes nuttallii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=29402, accessed on February 14, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 14, 2016.


Isoetes nuttallii
click for enlargement
© 2011 Barry Breckling
Isoetes nuttallii
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© 2005 Gary A. Monroe
Isoetes nuttallii
click for enlargement
© 2005 Gary A. Monroe

More photos of Isoetes nuttallii in CalPhotos


Geographic subdivisions for Isoetes nuttallii:
NCoR, CaR, SN, ScV, n SnJV, CW (exc SCoRI), SCo, PR, w MP;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.