Key to Platanthera

View taxon page for Platanthera

(For a list of species in Platanthera, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

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 

Elongate, with nearly parallel sides; narrower than elliptic or oblong.

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 

Elongate, with parallel sides and, at any point, round in transverse section.

, ± curved – lip 

lanceolate 

Narrowly elongate, widest in the basal half, often tapered to an acute tip.

to 

oblong 

Longer than wide, with nearly parallel sides; wider than linear.

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

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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