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Sidalcea hirtipes

bluff mallow, bristly-stem checker-mallow, bristly-stem checkerbloom, hairy-stem checkermallow

Sierra checker mallow, Sierra checkerbloom

Habit Herbs, perennial, usually in colonies, 0.7–1.3(–1.8) m, not glaucous, with thick, rather woody taproot and coarse, elongate (cordlike) rhizomes 20–100 × 5 mm. Herbs, perennial, 0.2–0.5 m, not glaucous, with woody taproot and rootstocks, without well-developed rhizomes, but horizontal stems rhizomelike.
Stems

several, scattered, erect, arising from rhizome apices, usually slightly hollow, densely, harshly bristly-hirsute, hairs stiff, pustular, simple, forked, or stellate, often 2–2.5 mm.

scattered, ascending-decumbent or creeping, freely rooting, solid, flowering stems ascending to erect, proximal and midstem densely spreading-long-hirsute, bristles 2–3 mm, often on swollen pads, rarely subglabrous, base without stellate hairs, distally somewhat stellate-puberulent.

Leaves

basal and cauline;

stipules linear-subulate, 6–8 × 1–1.5 mm;

petioles of proximal leaves 20–30 cm, 3 times as long as blades, reduced distally to 1/2 times as long as blades;

blades: basal and proximalmost orbiculate to reniform, shallowly 5–9-lobed, 10–15 × 10–15 cm, thick, base narrowly cordate, lobe margins coarsely crenate-dentate, apex rounded, surfaces coarsely hirsute, hairs stiff;

distal orbiculate, deeply palmately 5–7-lobed, incised ± to base, lobes sometimes lobed again, base cuneate, apex acute, deeply 2–3-toothed, surfaces long-hirsute or with 2–4-rayed, stellate hairs abaxially.

basal and cauline;

stipules on prostrate stems wide-lanceolate to ovate, 5–7 × 2–5 mm, elsewhere 3–6 × 1.3–2 mm;

petiole 3–8(–15) cm, longest on basal leaves, proximalmost 3 times blade length, reduced distally;

blades: proximalmost suborbiculate, unlobed or very shallowly lobed, 2.5–5 × 2.5–5 cm, base wide-cordate, margins deeply crenate, apex rounded, surfaces usually bristly, hairs long, simple, to subglabrous, not stellate-hairy;

distal rather similar to proximalmost or more deeply palmately 3–5(–7)-lobed or toothed, lobes simple or 3-dentate.

Inflorescences

erect, spiciform to subcapitate, dense, calyces usually conspicuously overlapping in flower and sometimes in fruit, proximals usually long-pedunculate, unbranched or branched, 20+-flowered, 10+ flowers usually open on spike at same time, not interrupted, not 1-sided, usually to 8 cm, usually not elongate but sometimes slightly elongated in some populations and to 20 cm in fruit;

bracts paired or single, linear, distal undivided, proximal distinct to base, 6 mm, mostly slightly longer than pedicels.

erect, open or some flowers overlapping, calyces not conspicuously overlapping except sometimes in bud, unbranched, usually 2–10-flowered, flowers 1+ cm apart, not much elongated, usually 1-sided, (5–)10–20 cm;

bracts linear or narrowly oblong-lanceolate, 2-fid, usually inrolled, proximal separated to base, 2–4 mm, usually equaling or slightly longer than pedicels, much shorter than calyx.

Pedicels

1–3(–5) mm;

involucellar bractlets absent.

2–5 mm;

involucellar bractlets absent.

Flowers

bisexual or unisexual and pistillate, plants gynodioecious;

calyx often purple tinted, 9–11 mm, to 11–16 mm in fruit, margins ciliate, hairs 1–2 mm, surfaces finely stellate-hairy at base and with coarser, longer, simple and stellate hairs apically;

petals usually pale pink to rose-lavender, rarely white, slightly or not pale-veined, (9–)10–21 mm, pistillate often 9–14 mm;

staminal column 5–7(–10) mm, hairy;

anthers white;

stigmas 5–10.

bisexual;

calyx (6.5–)8–10 mm, somewhat accrescent, stellate-puberulent, marginal hairs longer, sometimes few glandular, multicellular, lobes sometimes dull purplish at tips;

petals dark pink to pale lavender-pink, usually pale-veined, 12–20 mm;

staminal column 6–7 mm, minutely hirtellous;

anthers white;

stigmas (6–)8–10.

Seeds

2.5–3.5 mm.

1.5–2 mm.

Schizocarps

7–8 mm diam.;

mericarps 5–10, 3.5–4 mm, glabrous or sparsely stellate-puberulent, roughened, prominently reticulate-veined, sides rugose and pitted, back less so, mucro 0.6–0.8 mm.

6 mm diam.;

mericarps (6–)8–10, 3 mm, roughened, top, back, mucro densely stellate-puberulent, deeply reticulate-veined, pitted, mucro 1 mm.

2n

= 60.

= 20.

Sidalcea hirtipes

Sidalcea reptans

Phenology Flowering (Apr–)May–Jul(–Aug). Flowering Jun–Aug.
Habitat Prairie remnants, coastal bluffs, open shrublands, fencerows, meadows, usually mesic, basaltic soil Moist meadows, dry places in pine forests
Elevation 0–200(–1200) m [0–700(–3900) ft] 1100–2500 m [3600–8200 ft]
Distribution
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Of conservation concern.

Sidalcea hirtipes is uncommon and known from Clatsop, Lincoln, and Tillamook counties in Oregon and Clark, Lewis, and Wahkiakum counties in Washington. Its elevation and habitat vary, and it seems as much at home on steep coastal cliffs as in more inland, historic prairies and mountain meadows. Populations can appear to be large because of the long-rhizomatous and clonal nature of the plants; they are few and local. It is threatened by grazing, loss of habitat, fire suppression, road construction and maintenance, and changes in hydrology. It is a candidate for listing in Oregon and has been listed as endangered in Washington. Sidalcea hirtipes is characterized by its coarse indument of bristle hairs, its generally compact spikelike inflorescences, its relatively few, large, erect, hirsute leaves, and, especially, its extensive, coarse rhizomes. The inflorescences in some populations are elongated in fruit; its range, hirsute indument, and thick leaves along with coarse rhizomes help to distinguish it from other species. Stem internode length varies depending on habitat, as in many other Sidalcea. Molecular data suggest a relationship among S. hirtipes and S. asprella, S. celata, and S. gigantea (K. Andreasen and B. G. Baldwin 2003).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Sidalcea reptans is generally distinguished by its long-creeping, freely rooting stems with ascending ends that are long bristly-hairy proximally, its wide stipules on the proximal stems, its proximal leaves that are unlobed, crenate, long-bristly hairy, and on relatively long petioles, and its mericarps that are densely stellate-puberulent on their top and back and on the relatively long mucro. It occurs at relatively high elevations for Sidalcea and is found mainly in the central high Sierra Nevada.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Parent taxa Malvaceae > subfam. Malvoideae > Sidalcea Malvaceae > subfam. Malvoideae > Sidalcea
Sibling taxa
S. asprella, S. calycosa, S. campestris, S. candida, S. celata, S. covillei, S. cusickii, S. diploscypha, S. elegans, S. gigantea, S. glaucescens, S. hartwegii, S. hendersonii, S. hickmanii, S. hirsuta, S. keckii, S. malachroides, S. malviflora, S. multifida, S. nelsoniana, S. neomexicana, S. oregana, S. pedata, S. ranunculacea, S. reptans, S. robusta, S. setosa, S. sparsifolia, S. stipularis, S. virgata
S. asprella, S. calycosa, S. campestris, S. candida, S. celata, S. covillei, S. cusickii, S. diploscypha, S. elegans, S. gigantea, S. glaucescens, S. hartwegii, S. hendersonii, S. hickmanii, S. hirsuta, S. hirtipes, S. keckii, S. malachroides, S. malviflora, S. multifida, S. nelsoniana, S. neomexicana, S. oregana, S. pedata, S. ranunculacea, S. robusta, S. setosa, S. sparsifolia, S. stipularis, S. virgata
Synonyms S. favosa, S. spicata var. reptans
Name authority C. L. Hitchcock: Perenn. Sp. Sidalcea, 42. (1957) Greene: Pittonia 3: 159. (1897)
Source FNA vol. 6, p. 339. Treatment author: Steven R. Hill. FNA vol. 6, p. 352. Treatment author: Steven R. Hill.
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