Sidalcea oregana subsp. valida

(Greene) C. L. Hitchcock

Perenn. Sp. Sidalcea, 67. 1957.

Common names: Kenwood Marsh checkerbloom
Conservation concernEndemic
Basionym: Sidalcea valida Greene Pittonia 3: 157. 1897
Synonyms: S. spicata subsp. valida (Greene) Wiggins
Treatment appears in FNA Volume 6. Treatment on page 351. Mentioned on page 347, 348, 350.

Plants 0.9–1.2 (–1.5) m, with thick, ± fleshy roots or rootstock. Stems decumbent-based, base often rooting, branched or not, solid, often hollow in age, 5–10 mm diam. near base, base usually bristly-hirsute, sometimes with minute stellate hairs, bristle hairs 1–1.5 mm, becoming glabrate distally. Leaves: stipules linear or lanceolate, 4–longer than pedicels, shorter than calyx. Pedicels 1–2 mm. Flowers bisexual or unisexual and pistillate, plants gynodioecious; calyx 7.5 mm, accrescent, finely stellate-puberulent, sparsely, if at all, bristly; petals dark rose-pink to pink-lavender, 10–15 mm; staminal column 4–6 mm, hairy; anthers white; stigmas (6 or) 7 or 8. Schizocarps 5–6 mm diam.; mericarps (6 or) 7 or 8, 3 mm, sparsely glandularpuberulent, smooth, mucro 0.5 mm. Seeds 1.5–2.5 mm. 2n = 20.


Phenology: Flowering Jun–Sep.
Habitat: Marshes
Elevation: 100–200 m

Discussion

Of conservation concern.

Subspecies valida is known from a small area and is threatened by grazing and marsh alteration. It is found in freshwater marshes near Kenwood, southern outer North Coast Ranges in Sonoma County. It has been listed as endangered in California and also federally. It is similar to subsp. hydrophila except in overall size, spike length, number of flowers, and indument patterns as well as range and habitat. The somewhat fleshy roots are a reflection of its marshy habitat; it is not closely related to the other fleshy-rooted Sidalcea species.

Selected References

None.

Lower Taxa

None.

"elongating" is not a number.

Steven R. Hill +
(Greene) C. L. Hitchcock +
hollow +, solid +, not +, branched +  and rooting +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
bristly-hirsute +
cordate +
Sidalcea valida +
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 />) +
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 />) +
bristly +  and stellate-puberulent +
accrescent +
7.5 cm75 mm <br />0.075 m <br /> (?) +
indehiscent +  and loculicidal +
Kenwood Marsh checkerbloom +
3(-5)-lobed +  and unlobed +
100–200 m +
sparse;copious +
unisexual +  and bisexual +
Marshes +
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 +
not stellate-hairy +  and glabrous +
wedge--shaped +
3 cm30 mm <br />0.03 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
(3-)5-9-lobed +
0.5 cm5 mm <br />0.005 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 +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering Jun–Sep. +
Perenn. Sp. Sidalcea, +
elongated +
5mm +  and 6mm +
hairy +  and glabrous +
reniform +
1.5mm +  and 2.5mm +
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 +, branched +, unbranched +  and rooting +
8 +  and 7 +
filiform +, linear +  and capitate +
1-2 times number of carpels +
0.6 cm6 mm <br />0.006 m <br /> (1.4 cm14 mm <br />0.014 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 +
S. spicata subsp. valida +
Sidalcea oregana subsp. valida +
Sidalcea oregana +
subspecies +
not +  and glaucous +