Sidalcea oregana subsp. hydrophila

(A. Heller) C. L. Hitchcock

Perenn. Sp. Sidalcea, 67. 1957.

Common names: Meadow checkerbloom
Conservation concernEndemic
Basionym: Sidalcea hydrophila A. Heller Muhlenbergia 1: 107. 1904
Treatment appears in FNA Volume 6. Treatment on page 350. Mentioned on page 348, 351.

Plants 0.3–0.9 m, with thick, woody taproot and caudex, sometimes forming small patches or colonies. Stems decumbent-based, often rooting, branched or not, solid or hollow near base in age, usually to 5 mm diam. near base, base stellate-bristly or hirsute, bristle hairs 2 mm. Leaves: stipules linear or lanceolate, 4–6 (–9) × 0.5–1 mm; petioles of basal leaves (5–) 10–20 (–30) cm, 3–4+ times as long as blade, reduced distally and distalmost leaves longer than mature inflorescence; bracts linear, undivided, 4–6 mm, sometimes longer than young flower buds, much longer than pedicels, shorter than calyx. Pedicels 1–2 mm. Flowers bisexual, sometimes also unisexual and pistillate, plants gynodioecious; calyx 6–8 mm, stellate-puberulent, not bristly; petals bright pink, 8–12 mm; staminal column 4–6 mm, hairy; anthers white; stigmas 7–9. Schizocarps 4–5 mm diam.; mericarps 7–9, 2–2.5 mm, usually glabrous or sparsely glandularpuberulent on back, smooth, mucro 0.3 mm. Seeds 1.5–2 mm. 2n = 20.


Phenology: Flowering Jul–Sep.
Habitat: Wet soil of stream banks, seeps, meadows
Elevation: 1100–2300 m

Discussion

Of conservation concern.

Subspecies hydrophila is generally recognized by its few-flowered, compact, terminal, headlike spikes in branched inflorescences; its long bristles on the proximal stems; and its high wet mountain-meadow habitat. It intergrades somewhat with subsp. spicata. Similar plants, possibly referable to subsp. hydrophila, have been found near Spooner Lake in Douglas County, Nevada. Subspecies valida also has compact spicate inflorescences, but it can be distinguished by its longer spikes, greater flower number, thicker stems with stellate hairs, and marshy habitat at lower elevations. Subspecies hydrophila occurs in the high and inner North Coast Ranges in Colusa, Glenn, Lake, Mendocino, and Napa counties, California, and possibly in Douglas County, Nevada.

Selected References

None.

Lower Taxa

None.

"elongating" is not a number.

Steven R. Hill +
(A. Heller) C. L. Hitchcock +
hirsute +  and or +
cordate +
Sidalcea hydrophila +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
reniform-orbiculate +  and cordate +
3cm;10cm +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
much longer +  and sometimes longer +
divided +, undivided +  and 2-fid +
reticulate-veined +, not leafy-bracted +  and open +
overlapping +
1.5 cm15 mm <br />0.015 m <br /> (10 cm100 mm <br />0.1 m <br />) +
not bristly +  and stellate-puberulent +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
indehiscent +  and loculicidal +
Meadow checkerbloom +
3(-5)-lobed +  and unlobed +
Calif. +  and Nev. +
1100–2300 m +
sparse;copious +
unisexual +  and bisexual +
Wet soil of stream banks, seeps, meadows +
stellate +  and forked +
minute +
axillary +  and terminal +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
3-5 times as long as blades +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
cauline +  and basal +
reticulate-veined +  and smooth +
entire +  and serrate +
rounded;crenate +
sparsely +  and glabrous +
wedge--shaped +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
(3-)5-9-lobed +
0.3 cm3 mm <br />0.003 m <br /> (?) +
3-40-carpellate +
(1-)2-many +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pistillate +  and pale-veined +
overlapping +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adnate +  and distinct +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3-4+ times as long as blade +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering Jul–Sep. +
Perenn. Sp. Sidalcea, +
elongated +
4mm +  and 5mm +
hairy +  and glabrous +
reniform +
1.5mm +  and 2mm +
Lobed (?) +  and Unlobed (?) +
persistent +
Conservation concern +  and Endemic +
sessile +  and subsessile +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
hollow +, solid +, not +, branched +  and rooting +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
7 +  and 9 +
filiform +, linear +  and capitate +
1-2 times number of carpels +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
unbranched +  and branched +
hairy +  and glabrous +
Hesperalcea +
Sidalcea oregana subsp. hydrophila +
Sidalcea oregana +
subspecies +
not +  and glaucous +