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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.
Rhizome tuber-like, elongate.
Leaf: cauline, alternate, linear to elliptic or lanceolate, gradually reduced upward, with 1 lengthwise fold.
Inflorescence: generally spike; flower bracts leaf-like.
Flower: perianth white to yellow-green or green; sepals ± equal, upper generally hood-like, lower free, generally spreading; lateral petals generally erect, lip spurred, pendent to upcurved; column ± erect.
Fruit: ascending to erect.
± 85 species: temperate North America, Eurasia. (Greek: wide anther) [Sheviak & Jennings 2006 Rhodora 108:19–33] Identification often difficult due to intermediates, hybrids; additional species expected in CA. Platanthera hyperborea (L.) Lindl. not in CA.
Unabridged references: [Colwell et al. 2007 Madroño 54:86–93]
Unabridged note: In CA, > 1 sp. often occurs in a given area and blooms at ± the same time, yielding many hybrids and hybrid swarms, including some that have not been named, e.g., Platanthera dilatata × Platanthera tescamnis, as well as others that have, e.g., Platanthera ×estesii W.J. Schrenk (Platanthera dilatata × Platanthera stricta) and Platanthera ×lassenii W.J. Schrenk (Platanthera dilatata × Platanthera sparsiflora). Some purported hybrids, e.g., Platanthera ×correllii W.J. Schrenk and Platanthera ×media (Rydb.) Luer, now treated as a synonym of Platanthera huronensis (Nutt.) Lindl., do not occur in CA.
1. Perianth white to cream; spur generally >= 1.5 × lip ..... P. dilatata var. leucostachys
1' Perianth green to yellow-green; spur << to ± > lip
2. Column generally 2.5–4 mm, ± 2/3 hood formed by upper sepal, lateral petals; lip linear to lance-linear ..... P. sparsiflora
2' Column generally 1.5–2 mm, <= ± 1/2 hood formed by upper sepal, lateral petals; lip wider than lance-linear
3. Spur generally cylindric, ± curved — lip lanceolate to oblong or linear-oblong, green-yellow to yellow; leaves clustered near base ..... P. tescamnis
3' Spur club- to sac-like
4. Lip linear to lanceolate, green, red-marked or not; leaves not clustered ..... P. stricta
4' Lip generally lance-rhombic, yellow, not red-marked; leaves clustered below ..... P. yosemitensis
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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