Filipendula occidentalis

(S. Watson) Howell

Fl. N.W. Amer., 185. 1898.

Common names: Queen of the forest
Conservation concernEndemic
Basionym: Spiraea occidentalis S. Watson Proc. Amer. Acad. Arts 18: 192. 1883
Synonyms: S. camtschatica var. occidentalis (S. Watson) Wenzig
Treatment appears in FNA Volume 9. Treatment on page 25. Mentioned on page 24.

Plants weakly rhizomatous, 7–15 dm. Rhizomes horizontal, stout, 10–15 mm wide, internodes 1–4 cm; root-tubers absent. Stems finely puberulent distally. Leaves: basal 1 or 2, deciduous by flowering; stipules round, 1–1.5 cm diam., base not auriculate; lateral leaflets in 1–3 pairs or lacking, remote, ovate to elliptic, to 1 cm, margins serrate; terminal leaflets round, 6–16 cm diam., palmately 5–7-lobed, lobes ovate to oblong-lanceolate, margins doubly serrate, apex acute to acuminate, surfaces short-appressed hairy at least on veins. Inflorescences 100+-flowered; branches and pedicels densely short-appressed hairy, hairs straight. Flowers: hypanthium nearly flat, saucer-shaped; sepals (4–) 5 (–6), green, narrowly triangular, 4–6 mm, margins often serrate, usually with midrib, abaxially puberulent, adaxially glabrous; petals (4–) 5 (–6), white, in buds sometimes marginally pink, oblanceolate, 10–15 mm, not clawed, base broad, margins entire; stamens white, about equal to petals. Achenes 7–12, flattened, lanceolate, straight, 6–7.5 mm, sutures densely ciliate, faces sparsely hairy; stipes 1–2 mm; styles 1.5–2 mm.


Phenology: Flowering summer (Jun–Aug).
Habitat: Wet, mossy rock along forest streams, at or slightly above water level, wet rock on mountain slopes, riverbanks, rocky summits
Elevation: 30–1000 m

Discussion

Of conservation concern.

Filipendula occidentalis is known only from the valleys of several small rivers in the coast ranges of northwestern Oregon and southwestern Washington. The species is threatened by logging and associated forest-management activities. The species is most probably related to F. camtschatica (Pallas) Maximowicz from the Pacific coast of Asia.

Selected References

None.

Lower Taxa

None.
... more about "Filipendula occidentalis"
sparsely short-hairy +  and tomentose +
lanceolate +  and flattened +
6mm +  and 7.5mm +
short-hairy +  and glabrous +
Ivan A. Schanzer +
(S. Watson) Howell +
persistent +
compound +  and simple +
opposite +  and alternate +
not auriculate +
Spiraea occidentalis +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
sessile +  and stipitate +
free +  and distinct +
ciliate +  and hirsute +
Queen of the forest +
Oreg. +  and Wash. +
not +  and aggregated +
30–1000 m +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
lanceolate +  and oblanceolate +
0.3 cm3 mm <br />0.003 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Wet, mossy rock along forest streams, at or slightly above water level, wet rock on mountain slopes, riverbanks, rocky summits +
straight +
1 cm10 mm <br />0.01 m <br /> (?) +
crassinucellate +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
deciduous +
ovate +  and oblong-lanceolate +
entire +  and serrate +
glabrous +  and puberulent +
ovate +  and elliptic +
inferior +  and superior +
clustered +, biseriate +  and superposed +
hairy +  and glabrous +
5 (?) +  and 6 (?) +
free +  and distinct +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering summer (Jun–Aug). +
adnate +, free +, connate +  and distinct +
Fl. N.W. Amer., +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not arillate +
persistent +
free +  and distinct +
triangular +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
shorter to longer +
leafy +  and simple +
1 +  and 10 +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pinnate +  and nearly palmate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
adnate +  and free +
persistent +
distinct +
terminal +  and subterminal +
not elongate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
S. camtschatica var. occidentalis +
Filipendula occidentalis +
Filipendula +
species +
6 cm60 mm <br />0.06 m <br /> (16 cm160 mm <br />0.16 m <br />) +
5-7-lobed +  and round +
inconspicuous +
enlarged +