Difference between revisions of "Isoëtes orcuttii"
Fern Bull. 8: 13. 1900.
Common names: Orcutt's quillwort
Synonyms: Isoëtes nuttallii var. orcuttii (A. A. Eaton) Clute
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>becoming terrestrial. <b>Rootstock</b> nearly globose 2(–3)-lobed. <b>Leaves</b> deciduous, bright green, pale toward base, less than 8 cm, gradually tapering to tip, often surrounded at base by several black scales to ca. 5 mm, spirally arranged, pliant, gradually tapering to tip. <b>Velum</b> covering entire sporangium. <b>Sporangium</b> wall unpigmented. <b>Megaspores</b> white to gray, lustrous, 200–380 μm diam., ± smooth to obscurely tuberculate; girdle obscure. <b>Microspores</b> brown in mass, 20–30 μm, smooth to papillose. <b>2n</b> = 22.</span><!-- |
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| + | |phenology=Spores mature in spring. | ||
|habitat=Vernal pools | |habitat=Vernal pools | ||
|elevation=mostly 0–1500 m | |elevation=mostly 0–1500 m | ||
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|basionyms= | |basionyms= | ||
|family=Isoëtaceae | |family=Isoëtaceae | ||
| + | |phenology=Spores mature in spring. | ||
|habitat=Vernal pools | |habitat=Vernal pools | ||
|elevation=mostly 0–1500 m | |elevation=mostly 0–1500 m | ||
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|publication year=1900 | |publication year=1900 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_430.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes orcuttii | |species=Isoëtes orcuttii | ||
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Revision as of 13:20, 27 July 2019
Plants becoming terrestrial. Rootstock nearly globose 2(–3)-lobed. Leaves deciduous, bright green, pale toward base, less than 8 cm, gradually tapering to tip, often surrounded at base by several black scales to ca. 5 mm, spirally arranged, pliant, gradually tapering to tip. Velum covering entire sporangium. Sporangium wall unpigmented. Megaspores white to gray, lustrous, 200–380 μm diam., ± smooth to obscurely tuberculate; girdle obscure. Microspores brown in mass, 20–30 μm, smooth to papillose. 2n = 22.
Phenology: Spores mature in spring.
Habitat: Vernal pools
Elevation: mostly 0–1500 m
Distribution
Calif., Mexico in Baja California.
Discussion
Isoëtes orcuttii, a vernal pool endemic, may be difficult to distinguish from I. nuttallii, which occurs in a wider range of habitats. Plants of I. orcuttii are generally smaller than those of I. nuttallii, which has longer, thicker, less flexible leaves and larger megaspores.
Selected References
None.
Lower Taxa
None.