Epilobium brevifolium subsp. trichoneurum
Content
Description
Robust, perennial herb, 15-40 cm, the underground parts not scaly;
Leaves mostly opposite, alternate in and near the inflorescence, the upper ones reduced, strigulose along the veins and margins especially below, the nerves evident, ovate, 1-3 by 0.4-1.5 cm, serrate;
Inflorescence slightly nodding.
Flowers erect, borne in the axils of reduced upper leaves.
Sepals 2.5-5.5 by 1-1.3 mm.
Petals obovate, 4.5-8 by 3-5.5 mm, rose purple, the notch 1-1.5 mm deep.
Capsule 3.5-7 cm long, on a pedicel 0-1 cm.
Seeds 0.9-1.2 by 0.4-0.5 mm, papillose, blackish brown, not beaked, obovoid, blunt at both ends, the coma 5-7 mm long, white.
Distribution
Asia-Tropical: Assam (Assam present); Philippines (Philippines present), Burma present, Chumbi Valley present, Continental SE. Asia present, Mountain Province of N. Luzon present, SE. Tibet present, W. China present
Continental SE. Asia (SE. Tibet: Chumbi Valley, to Assam, Burma, and W. China); in Malesia: Philippines (Mountain Province of N. Luzon).
Notes
E. brevifolium subsp. trichoneurum is one of three subspecies of a species which ranges from Himachal Pradesh in the Western Himalaya eastwards throughout the Himalaya and southern China to Formosa, northern Luzon, northern Vietnam, and northern Burma. In northern Luzon, it occurs together with the other species found in the Philippines, E. platystigmatosum, and one plant of the collection CLEMENS 16385, suggests hybridization between these two entities, which are usually widely distinct morphologically, although doubtless more closely related to one another than to other Malesian species.