Epipactis (sect. Epipactis) sect. Epipactis
Creators: name: Fateryga, Alexander V.
name: Fateryga, Valentina V.
name: Efimov, Petr G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Epipactis

description: Key to the species of Epipactis sect. Epipactis in the Crimea and the Russian Caucasus   
1. Rachis of inflorescence densely pubescent........................................................................................................................................2  
- Rachis of inflorescence glabrous or subglabrous (minute pubescence could sometimes be visible in a microscope)....................11  
2. Ovary strongly pubescent same as rachis of inflorescence; leaves usually ± equal in length to the internodes................................3  
- Ovaries glabrous or significantly more sparsely pubescent than the rachis of inflorescence; leaves usually much longer than the internodes...........................................................................................................................................................................................6  
 3. Epichile green, with one big, irregular, strongly crenate boss near the base; sepals shorter than 7 mm.................... E. microphylla   
- Epichile greenish-white to bright-pink, with two separate bosses near the base; sepals longer than 7 mm......................................4  
 4. Viscidium absent; epichile greenish-white to dirty-pink........................................................................................... E. krymmontana   
- Viscidium present; epichile pale-pink to bright-pink.........................................................................................................................5  
 5. Leaves green, not suffused purple, elliptic, rarely lanceolate........................................................ E. condensata subsp. condensata   
 - Leaves suffused by purple, ovate, rarely elliptic........................................................................... E. condensata subsp. kuenkeleana   
 6. Viscidium absent, pollinia touching the stigma even in young flowers; epichile pinkish-green, ± flat or with two indistinct small bosses near the base; petals whitish-green; pedicel completely green............................................................................... E. muelleri   
- Viscidium present at least in young flowers, pollinia not touching the stigma; epichile usually with two large bosses near the base, if bosses absent, then the epichile is green; petals of various coloration; pedicel purplish at least at the base........................7  
 7. Epichile completely green, ± flat or with two indistinct small bosses near the base; sepals 6.5–8 mm long; viscidium present only in young flowers.................................................................................................................................................................. E. pontica   
- Epichile whitish-pink to bright-pink or crimson, with two large bosses near the base; sepals 8–12 mm long; viscidium usually present not only in young flowers......................................................................................................................................................8  
 8. Leaves concentrated mainly at the base of the stem; inflorescence occupies about 2/3 of the stem; epichile usually with yellow longitudinal stripe................................................................................................................................................................ E. turcica   
- Leaves scattered regularly along the stem; inflorescence occupies about 1/3 of the stem; epichile without yellow longitudinal stripe...................................................................................................................................................................................................9  
 9. Epichile pale pink to pink, paler than the petals; leaves ± flat....................................................... E. helleborine subsp. orbicularis   
- Epichile pale pink to bright-pink and crimson, not paler and usually brighter than the petals; leaves ± arching............................10  
 10. Epichile brighter than petals; medial leaves elliptic to elliptically lanceolate................................... E. helleborine subsp. levantina   
 - Epichile ± same in colour as petals; medial leaves ovate to elliptic............................................... E. helleborine subsp. helleborine   
 11. Leaves erect; stem completely green or purplish at the base; pedicel sometimes completely green; flowers ± campanulate.......................................................................................................................................................................................................... E. taurica   
 - Leaves arching; stem always purplish at the base; pedicel always purple at least at the base; tepals ± spreading............. E. persica
description: Published as part of Fateryga, Alexander V., Fateryga, Valentina V. & Efimov, Petr G., 2014, Epipactis krymmontana (Orchidaceae), a new species endemic to the Crimean Mountains and notes on the related taxa in the Crimea and bordering Russian Caucasus, pp. 22-30 in Phytotaxa 172 (1) on page 28, DOI: 10.11646/phytotaxa.172.1.3, http://zenodo.org/record/5142201