Pale Willowherb

Foodplant / spot causer
uredium of Pucciniastrum epilobii causes spots on live leaf of Epilobium roseum
Remarks: season: 8-10

In Great Britain and/or Ireland:
Foodplant / parasite
Sphaerotheca epilobii parasitises live Epilobium roseum
Remarks: season: 8-10

Herbs erect, perennial, with fleshy elongated turions that leave leathery, obovate scales, rarely forming thin stolons. Stems 10-50 cm tall, simple or branched, strigillose usually mixed with glandular hairs throughout upper stem, glabrescent below, with 2 or 4 raised strigillose lines decurrent from margins of petioles. Leaves subsessile or petioles 2-10(-15) mm; cauline blade elliptic to oblong or lanceolate to narrowly ovate, 2.2-6 × 0.8-2.5 cm, subglabrous with strigillose margin and veins adaxially, base cuneate to rounded or subcordate, margin denticulate with 9-45 teeth per side, apex subobtuse to acute. Inflorescence and flowers erect. Sepals 3.5-5 mm. Petals pink to rose-purple, 5-8 mm. Stigma clavate to subcapitate, entire. Capsules 3-6 cm, strigillose and glandular pubescent; pedicels 0.6-1.5 cm. Seeds dark brown, 1-1.2 mm, papillose, with inconspicuous chalazal collar; coma white, detaching easily. 2n = 36.

Xinjiang [Kazakhstan, Russia; C and SW Asia, Europe].

Damp areas near streams, roadsides, ditches in mountains; 1500-2200 m.

Epilobium roseum is a species of flowering plant belonging to the family Onagraceae.

Its native range is Europe to China.