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Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens

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Maidenhair Spleenwort Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens dylan Victoria Park 25 Oct 2022, 2:39 p.m. 25 Oct 2022, 11:24 a.m.
Maidenhair Spleenwort Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens dylan Westbury Wildlife Park 26 Mar 2021, 10:12 a.m. 24 Mar 2021, 4:02 p.m.
Maidenhair Spleenwort Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens dylan Westbury Wildlife Park 26 Mar 2021, 10:12 a.m. 24 Mar 2021, 4:02 p.m.
Maidenhair Spleenwort Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens dylan Westbury Wildlife Park 26 Mar 2021, 10:12 a.m. 24 Mar 2021, 4:02 p.m.
Maidenhair Spleenwort Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens dylan Westbury Wildlife Park 26 Mar 2021, 10:12 a.m. 24 Mar 2021, 4:02 p.m.
Maidenhair Spleenwort Maidenhair Spleenwort - Asplenium trichomanes subsp. quadrivalens dylan Bristol 8 Jan 2022, 9:31 p.m. 3 Jan 2022, 2:31 p.m.

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Species Description

Common and widespread throughout the UK. Habitat includes: Calcareous to neutral rocks or walls.

Stace 4:

ssp. quadrivalens D.E. Mey. Less delicate and longer-leaved than ssp. trichomanes, with thicker petiole and rachis; pinnae subsessile, usually symmetric in overall shape but attached to rachis near proximal corner; spores (27)34 - 43(50) μm; 2n=144. Calcareous or neutral rocks or walls (including mortar in walls in acidic regions); common over most of British Isles. Hybridises with ssp. trichomanes (=nothossp. lusaticum) (D.E. Mey.) Lawalrée) and ssp. pachyrachis (=nothossp. staufferi Lovis & Reichst.).

Key:

  • Pinnae suborbicular to oblong, often attached to petiole at proximal corner, usually subentire, about glabrous
  • Pinnae oblong, usually about symmetric, ≤12mm, convex to flat on upperside; sori ≤3mm, ≤9(12) per pinnae; rhizome-scales ≤5mm; calcicole