Epilobium hirsutum
Epilobium palustre
codlins-and-cream, fiddle grass, fiddle grass willowherb, great or great hairy willowherb, great willowherb, hairy willlowherb, hairy willow-herb, épilobe hirsute
marsh willow-herb, marsh willowweed, swamp willowherb, épilobe palustre
erect to ascending, often clumped, terete, 25–120(–250) cm, unusually thick, 3–9 mm diam., well branched mainly in distal 1/2, densely long-villous throughout, usually mixed glandular puberulent distally, rarely sparsely villous or densely white-tomentose.
erect, loosely clustered, terete, 5–80 cm, simple to well branched, subglabrous on proximal internodes, sometimes with faint strigillose lines decurrent from margins of petioles, densely strigillose distally.
opposite proximal to inflorescence, alternate distally, sessile and ± clasping stem;
blade elliptic-lanceolate to narrowly obovate or elliptic, 4–12(–23) × 0.3–4(–5) cm, base cuneate to attenuate, margins serrulate, 15–50 teeth per side, veins 6–9 per side, apex acute to acuminate or obtuse proximally, surfaces ± densely villous;
bracts moderately reduced.
opposite proximal to inflorescence, alternate distally, subsessile;
blade lanceolate or narrowly elliptic to sublinear, 1.5–7 × 0.2–1.9 cm, base cuneate, margins entire or inconspicuously denticulate, 2–6 teeth per side, veins inconspicuous, apex acute or acuminate, surfaces strigillose abaxially, subglabrous adaxially or strigillose only on margins and veins;
bracts smaller and narrower.
erect racemes or panicles, usually densely villous and glandular puberulent, rarely tomentose.
nodding in bud, later erect, racemes, not branched, densely strigillose, rarely mixed sparsely glandular puberulent.
erect;
buds 5–9 × 1.8–4.5 mm, sometimes beaked;
pedicel 3–11 mm;
floral tube 1.3–2.9 × 2.2–4 mm, conspicuous ring of spreading hairs near mouth inside;
sepals oblong-linear, often keeled, 6–12 × 1–3 mm, abaxial surface densely pubescent;
petals bright pink to rose-purple, rarely white, broadly obcordate, 9–20 × 7–15 mm, apical notch 1–3 mm;
filaments white or pink, those of longer stamens 5–10 mm, those of shorter ones 2.5–6 mm;
anthers cream, 1.5–3 × 0.6–1.2 mm;
ovary 15–34 mm, densely villous and glandular puberulent;
style white or pink, 5–12 mm, usually glabrous, stigma deeply 4-lobed, 1.8–2.2 × 3–5.5 mm, lobes recurved or spreading, exserted beyond anthers.
erect to spreading;
buds 2–5 × 1.5–2.5 mm;
pedicel 8–12 mm;
floral tube 0.6–1.8 × 1.3–2.2 mm, ring of spreading hairs at mouth inside;
sepals 1.4–4.5 × 0.8–1.5 mm, abaxial surface strigillose;
petals usually white, rarely pink, 2–9 × 1.8–5 mm, obcordate, apical notch 0.6–1.6 mm;
filaments cream or white, those of longer stamens 0.8–3.5 mm, those of shorter ones 0.4–2.1 mm;
anthers 0.4–1 × 0.3–0.7 mm;
ovary 12–35 mm, strigillose;
style cream, 1.5–4.5 mm, stigma clavate to cylindrical, entire, 0.8–2 × 0.5–1.4 mm, usually surrounded by, rarely exserted beyond, anthers.
often flushed purple, 25–90 mm, surfaces usually densely villous and glandular puberulent, rarely glabrescent;
pedicel 5–20 mm.
straight or upcurved, 25–90 mm, surfaces strigillose;
pedicel 15–35(–60) mm.
narrowly obovoid, 0.8–1.2 × 0.3–0.6 mm, chalazal collar inconspicuous, dark brown, surface coarsely papillose;
coma easily detached, tawny or dull white, 7–10 mm.
elliptic, attenuate to narrowly fusiform, 1.4–2.2 × 0.4–0.5 mm, chalazal collar 0.1–0.25 mm, conspicuous, surface finely papillose;
coma persistent, white, 5–7 mm.
= 36.
= 36.
Epilobium hirsutum
Epilobium palustre
Epilobium hirsutum is very widespread in cool temperate Eurasia and montane regions, occurring throughout Europe except in the far north (P. H. Raven 1968), through the Caucasus and central Asia (E. I. Steinberg 1949) to Nepal (Raven 1962), China (Chen C. J. et al. 1992), and Japan (A. W. Lievens and P. C. Hoch 1999). It occurs as well along the Mediterranean coast of Africa, through East Africa to southern Africa, and in the Canary and Cape Verde Islands (Raven 1967).
Epilobium hirsutum exceeds almost all other species of the genus in stature, so its size, very large flowers, and densely villous aspect make it easy to identify. R. L. Stuckey (1970) provided a detailed account of the introduction and spread of E. hirsutum in North America, noting the earliest known collection (July 1829) was from Newport, Rhode Island. Most early collections appeared in waste areas, particularly near harbor ballast piles, although some may have been grown in gardens. By the 1890s this species was well established along the Atlantic coastal region from New Jersey and Philadelphia through New England, and around Niagara Falls in the Great Lakes region. During the twentieth century, E. hirsutum spread extensively in southern Ontario and Quebec, south along the Atlantic coast to Maryland, and to all of the states along the southern shores of the Great Lakes, most recently including Wisconsin (1970), and Indiana (1972). It occurs in much the same habitat as that of another, more widely publicized invader, Lythrum salicaria, and sometimes is recorded as a companion species. The earliest known collection in western North America was made in 1933 in Bingen (Klickitat County), Washington. Whether from that introduction or others, E. hirsutum is now naturalized and widespread in the Pacific Northwest. It also was reported recently from the Denver region in Colorado and near Midway in Utah.
Epilobium grandiflorum F. H. Wiggers and E. grandiflorum Allioni are illegitimate names that pertain here.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Epilobium palustre is an extremely widespread circumboreal species that is relatively common from Alaska across Canada, especially around the Great Lakes to the Maritime provinces (mostly below 1000 m). This species is somewhat less common in the northeastern United States, and only scattered in the mountains of the western United States, south to California and Colorado (to 3000 m). It also occurs in ice-free regions of Greenland south of 70º north latitude, in northern and central Europe, across most of subarctic Russia to the Caucasus, the Himalaya complex, and eastern Asia, including Japan and the Russian Far East.
Epilobium palustre shows considerable variation across its very wide distribution and, not surprisingly, distinctive local races, which sometimes have been named formally, including several from northeastern North America. Within series Palustriformes by C. Haussknecht (1884), M. L. Fernald (1944d) clarified much confusion in names at that time, clearly delineating and establishing the nomenclature of E. davuricum, E. leptophyllum, E. palustre, and E. densum. Fernald also recognized E. nesophilum (see discussion under 18. E. leptophyllum) and E. pylaieanum, the latter based on small plants of E. palustre from southern Newfoundland.
Epilobium lineare Muhlenberg and E. palustre var. albiflorum Lehmann are illegitimate names that pertain here.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
IL Wildflowers
MD Biodiversity- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
Go Botany, 
MI Flora, 
MN Wildflowers, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
