Square-stalked Willowherb - Epilobium tetragonum subsp. lamyi
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Species Description
Rare but probably under-recorded in the South. Habitat includes: Damp disturbed places often in slight shade such as gardens, parks, allotments, churchyards, roadside verges, pavements (at the base of walls), wasteland etc.
Stace 4:
Ssp. lamyi (F.W. Schultz) Nyman (E. lamyi F.W. Schultz).
Differs from ssp. tetragonum in leaves shortly petiolate and usually oblong-lanceolate rather than narrowly oblong; 2n=36. Native; similar places to ssp. tetragonum; rather rare in South Britain. Often not treated as distinct from ssp. tetragonum; intermediates have been considered hybrids (E. x semiadnatum Borbás) but are more fertile than most hybrids in the genus.
Key:
- Petals 2.5-7(8.5)mm; stigma borne at same level as anthers; anthers 0.7-1.1(1.3)mm
- Leaves shortly petiolate