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Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
(Greek: evergreen, from habit of some species) 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.
1. Plant terrestrial (or becoming so), of seasonally wet soil, lake margins, temporary streams, vernal pools; generally < 1500 m
2. Translucent membrane covering < 75% of sporangium ..... I. howellii
2' Translucent membrane covering > 75% of sporangium
3. Plant of wet soil; leaf generally > 8 cm, > 1 mm wide at middle, rigid, ± brittle ..... I. nuttallii
3' Plant of vernal pools; leaf generally < 8 cm, < 1 mm wide at middle, soft, flexible ..... I. orcuttii
1' Plant underwater in persistent lakes or pools; generally > 1500 m
4. Female spores prickly ..... I. echinospora
4' Female spores ridged or tubercled
5. Lf abruptly tapered to tip; female spore 0.3–0.5 mm diam ..... I. bolanderi
5' Lf gradually tapered to tip; female spore 0.5–0.7 mm diam ..... I. occidentalis
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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