Jepson eFlora
Key to families | Table of families and genera

Key to Piperia

View taxon page for Piperia

1. Spur 6–18 mm (2.5–9 mm in Piperia cooperi, keyed only under 1')

2. Spur ± straight, perpendicular to inflorescence axis; upper sepal pointed forward; stem generally < 3 mm diam ..... P. transversa

2' Spur ± curved, parallel to inflorescence axis; upper sepal ascending to erect to curved back; stem generally > 3 mm diam

3. Sepals white with dark green midvein ..... P. elegans subsp. elegans

3' Perianth green to yellow-green

4. Lip deltate-ovate; lower sepals spreading ..... P. michaelii

4' Lip narrowly lanceolate or lance-deltate; lower sepals ± reflexed

5. Lateral petals ± sickle-shaped, 2 mm wide at base, 2–3 × as long ..... P. elongata

5' Lateral petals linear, 1 mm wide at base, 4–5 × as long ..... P. leptopetala (2)

1' Spur 1–6(9) mm

6. Perianth mostly white or white-margined on upper sepal, lateral petals, mostly white on lower sepals, lip; lip pointed down toward spur

7. Inflorescence generally ± 1-sided; stem bracts < 6; lip ± ovate, ± obtuse ..... P. candida

7' Inflorescence ± not 1-sided; stem bracts > 6; lip ± ovate or not, ± acute

8. Lateral petals ovate to lance-oblong, white margins ± equal; stem base swollen toward tuber; fragrance at night ..... P. elegans subsp. decurtata

8' Lateral petals sickle-shaped, white margins unequal, outer much wider than inner; stem base narrowed toward tuber; fragrance in daytime ..... P. yadonii

6' Perianth green; lip ± straight to strongly upcurved above middle

9. Spur < lip, 1–2.5 mm; leaves grass-like, erect, 3–10(19) mm wide ..... P. colemanii

9' Spur >= lip, 2–9 mm; leaves not grass-like, prostrate to spreading, (5)10–40 mm wide

10. Lateral petals linear, 4–5 × longer than wide; spur tapered; fragrance lemony or otherwise pleasant but not honey-like ..... P. leptopetala (2)

10' Lateral petals lanceolate to deltate-ovate, < 3.5 × longer than wide; spur cylindric, blunt; fragrance musky, soapy, or honey-like

11. Inflorescence axis <= peduncle; lip deltate-ovate; fragrance honey-like; stem long-tapered toward tuber ..... P. cooperi

11' Inflorescence axis generally > peduncle; lip broadly ovate to lance-elliptic; fragrance musky, soapy, or honey-like; stem uniform or swollen toward tuber ..... P. unalascensis


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [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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