Isoetes heldreichii

Taxonavigation

Taxonavigation: Isoetales
Superregnum: Eukaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Divisio: Tracheophyta Divisio: Lycopodiophyta Classis: Lycopodiopsida Subclassis: Isoetidae Ordo: Isoetales

Isoetes heldreichii Wettst., Verh. K. K. Zool.-Bot. Ges. Wien 36: 239 (1886).

Lectotype (designated by Troia & Greuter 2015: 398): Greece, Thessalia: Nom. and Ep. Karditsa: prope Karditsa in palude prope Palaiokastro [modern name: Mitropolis], 10 Jul 1885, Heldreich (WU 31761; isolectotypes: B 20-97359, -97360, -136490, WU 31762).

Native distribution areas:
Continental: Europe Regional: Southeastern Europe Greece (extinct). Continental: Asia-Temperate Regional: Western Asia East Aegean Islands (in error). References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2^nd Edition

Troìa, A., Pereira, J.B.S., Kim, C. & Taylor, W.C. 2016. The genus Isoetes (Isoetaceae): a provisional checklist of the accepted and unresolved taxa. Phytotaxa 277(2): 101–145. DOI: 10.11646/phytotaxa.277.2.1 ResearchGate Reference page.
Troìa, A. & Greuter, W. 2015. A conspectus of and key to Greek Isoetes (Isoetaceae), based on a reassessment of Haussknecht’s gatherings of 1885. Willdenowia 45(3): 391–403. DOI: 10.3372/wi.45.45303 Reference page.

Govaerts, R. et al. 2026. Isoetes heldreichii in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2026 May 31. Reference page.
International Plant Names Index. 2026. Isoetes heldreichii. Published online. Accessed: 31 May 2026. Reference page.
Hassler, M. 2026. World Ferns. Checklist of Ferns and Lycophytes of the World. . Isoetes heldreichii Accessed: 31 May 2026. Reference page.
Euro+Med 2006 onwards: Isoetes heldreichii in Euro+Med PlantBase – the information resource for Euro-Mediterranean plant diversity. Published online. Accessed: 2026 May 31.Reference page.