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. Sporangia: solitary, embedded in wide leaf base, < 1 cm, +- covered by a translucent membrane, male or female; male spores > 10000, < 0.045 mm, +- bean-shaped, gray or brown in mass; female spores 20--200, 0.2--0.7 mm, spheric, white, +- smooth, ridged, tubercled, or prickly. 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.
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 orcuttii A.A. Eaton
NATIVE Habit: Plant becoming terrestrial. Leaf: deciduous, generally < 8 cm, < 1 mm wide at middle, soft, flexible, tapered to tip, bright green; base white to +- brown, outermost fertile, often surrounded by several black scales. Sporangia: membrane covering > 75%; male spores 0.02--0.025 mm, brown in mass; female spores 0.2--0.4 mm, +- shiny, +- smooth. Chromosomes: 2n=22. Ecology: Vernal pools; Elevation: < 1700 m. Bioregional Distribution: NCoRI, (Howell Mtn, Napa Co.), CaR, n&c SNF, SNH, GV, CCo, SnFrB, SCo, PR; Distribution Outside California: southwestern Oregon; Baja California. Note: Spores mature spring. Jepson eFlora Author: W. Carl Taylor & Jon E. Keeley Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Isoetes occidentalis Next taxon: Lycopodiaceae
Citation for this treatment: W. Carl Taylor & Jon E. Keeley 2012, Isoetes orcuttii, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=29403, accessed on January 21, 2025.
Citation for the whole project: Jepson Flora Project (eds.) 2025, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on January 21, 2025.
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(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 occurrence).
MAP LEGEND View all CCH records All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).
