Isoetes orcuttii
Orcutt's quillwort
(c) Timothy McNitt, some rights reserved (CC BY), uploaded by Timothy McNitt · licence
Family: Isoetaceae · Type: Grass · Native
Isoetes orcuttii (Orcutt's quillwort) is a native California grass in the Isoetaceae family, recognized by vernal pool habitat, small size (<8cm, <1mm wide), soft flexible texture.
Orcutt's quillwort is a California native perennial found in the northern Coast Ranges, Sierra Nevada foothills, central valley, central and southern coastal areas, and Peninsular Ranges in vernal pools at elevations below 1,700 meters. This delicate aquatic plant has soft, bright green leaves less than 8 centimeters long and narrower than 1 millimeter, with distinctive white to brownish bases often surrounded by black scales. Growing as a low, flexible plant with deciduous leaves that taper to slender tips, it emerges in seasonal wetlands as a small, unassuming species. Its leaves are fertile at the outermost edges, producing male and female spores of varying sizes, with female spores ranging from 0.2 to 0.4 millimeters and appearing slightly shiny. The plant transforms from an aquatic to a terrestrial state as its habitat dries, revealing its adaptable nature in ephemeral water environments.
Identification and appearance
Key characters: 5 sympatric species - key features are vernal pool habitat, small size (<8cm, <1mm wide), soft flexible texture
Habitat and range
Habitat: Vernal pools
Elevation: < 1700 m
California counties: Shasta, Placer, San Diego, Sacramento, Riverside, Fresno, Los Angeles, Monterey, San Bernardino, Stanislaus, Yuba, Merced, Calaveras, Madera, Nevada, Marin, Butte, Tehama, Lake, Lassen, Napa, Contra Costa, Amador, San Joaquin, Santa Cruz, San Luis Obispo, Mendocino
Outside California: southwestern Oregon, Baja California
How to tell it apart
vs Juncus: Isoetes has a bulbous corm-like base with embedded spore capsules; Juncus has fibrous roots without sporangia.; vs Subularia: Isoetes leaves arise from a bulbous base; Subularia has a thin taproot with small white flowers above the leaves.; vs Triglochin: Isoetes has spore capsules at leaf bases; Triglochin produces tall flower spikes with tiny greenish flowers.; vs Sparganium: Isoetes forms tight tufts from a corm; Sparganium has creeping stems and round, burr-like flower heads.; vs Pilularia: Isoetes leaves stand rigidly erect; Pilularia leaves coil in fiddlehead fashion when young.
Frequently asked questions
Is Isoetes orcuttii native to California?
Yes. Isoetes orcuttii is native to California (recorded as native).
Where in California does Isoetes orcuttii grow?
Isoetes orcuttii occurs in Shasta, Placer, San Diego, Sacramento, Riverside, Fresno, Los Angeles, Monterey and other counties, at elevations of < 1700 m.
What plant family does Isoetes orcuttii belong to?
Isoetes orcuttii is in the Isoetaceae family, genus Isoetes.
What habitat does Isoetes orcuttii grow in?
Isoetes orcuttii grows in Vernal pools.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.