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Sidalcea asprella

dwarf checkerbloom, harsh checker mallow, harsh checkerbloom

cut leaf checker mallow, cut-leaf checkerbloom

Habit Herbs, perennial, 0.1–1(–1.2) m, infrequently ± glaucous, with caudex or not, usually with freely-rooting fibrous rootstocks or rhizomes (5–)10–30 cm × 2–4 mm, matted or not. Herbs, perennial, (0.1–)0.2–0.4(–0.6) m, pale-glaucous, with thick, rather woody taproot and simple or branched caudex, without rhizomes.
Stems

usually single, erect and sometimes supported by adjacent plants (sprawling), base prostrate or decumbent-ascending to erect, often rooting, solid, not brittle, sometimes ± glaucous distally, proximally stellate-hairy, glabrate, hairs minute or larger and coarse (never simple only), usually 4-rayed, 0.5–1 mm.

clustered, usually erect or ascending, sometimes proximally decumbent or prostrate, not rooting, solid, sparsely to densely appressed stellate-hairy.

Leaves

basal and/or cauline, similar in size and shape;

stipules linear to lanceolate, 2–3 × 1.1 mm;

petiole (1–)5–10(–15) cm, longest on proximal leaves, 1–4 times longer on proximal leaves to 1/2 times to as long as blade on distal leaves;

blade usually shallowly to deeply palmately 3–7-lobed usually halfway to base, proximal and distal cauline blades rounded to reniform, 2–3 × 2–5 cm, usually wider than long, base cordate to truncate, margins crenate, apex blunt or rounded, lobes narrowest at base, margins usually apically coarsely toothed, rarely entire, surfaces stellate-puberulent.

mostly basal, persistent, to 10+;

stipules linear-lanceolate to elliptic, 5–6 × 2 mm on proximal stem, 4–5 × 0.5 mm on distal stem;

petiole 5.5–16 cm, basal 3–5 times longer than blades, reduced distally to 1/2 times as long as blades;

blades: basal reniform-orbiculate, palmately (5–)7–9-lobed, deeply incised, (1.5–)2.5–4(–6) × (1.5–)2.5–4(–6) cm, base cordate, margins entire, apex rounded to acute, lobes linear to oblong, again deeply pinnately or ternately 3–5-lobed;

cauline ternately lobed, lobes linear to filiform, narrowest on distalmost leaves, somewhat fleshy, surfaces hairy, hairs appressed, stellate;

distalmost leaf lobes unlobed.

Inflorescences

ascending or erect, often spiciform, open, calyces not overlapping in flower or fruit, unbranched or branched, 2–15(–30)-flowered, elongate in both flower and fruit, usually 1-sided, 6–11(–30) cm;

bracts leaflike to linear, usually 2-fid, (2–)3–5(–15) mm.

erect, open, calyces not conspicuously overlapping except sometimes in bud, usually unbranched, usually 3–9(–15)-flowered, elongate, 1-sided, to 7–25 cm;

bracts usually paired, linear or lanceolate to narrowly ovate, proximal divided to base, distalmost 2-fid or simple, 5 mm, shorter to longer than pedicels.

Pedicels

2–5(–10) mm;

involucellar bractlets absent.

3–8(–10) mm;

involucellar bractlets absent.

Flowers

bisexual or unisexual and pistillate, plants gynodioecious;

calyx 5–12 mm, uniformly densely stellate-puberulent;

petals pink to pale purple, pale-veined, (5–)10–28 mm, pistillate flowers darker, 5–15 mm;

staminal column 4–5 mm, stellate-puberulent;

anthers white;

stigmas (6 or)7 or 8.

usually bisexual or, infrequently, unisexual and pistillate, plants gynodioecious;

calyx (6–)7–10 mm, slightly enlarged in fruit, uniformly minutely stellate-puberulent;

petals pink to rose, pale-veined at least when dry, 9–20(–25) mm, pistillate shortest;

staminal column 3.3–7.5 mm, sparsely stellate-hairy;

anthers pale yellowish to white;

stigmas 6 or 7.

Seeds

1.5–2.8 mm.

1.5–2 mm.

Schizocarps

6–8 mm diam.;

mericarps (6 or)7 or 8, 3–4 mm, usually glandular-puberulent to stellate-puberulent, sometimes glabrous, roughened, strongly reticulate-veined, sides and back pitted, mucro 0.5–1 mm.

5–7 mm diam.;

mericarps 6 or 7, 3.5–4.3 mm, roughened, back finely glandular-puberulent, sides and back coarsely reticulate-veined, pitted, mucro 0.5–1 mm.

2n

= 20.

Sidalcea asprella

Sidalcea multifida

Phenology Flowering May–Jul(–Sep).
Habitat Dry places, sagebrush scrub, pinyon-juniper or pine forests
Elevation (1200–)2000–2500(–2900) m [(3900–)6600–8200(–9500) ft]
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

Sidalcea asprella is variable and occurs from the central Sierra Nevada to southwestern Oregon. Typical plants in the central Sierra Nevada have weak, elongated stems that are often supported by neighboring vegetation; they lack simple recurved hairs at the stem base and may have either elongated rhizomes or a caudex. It has been confused with S. celata, S. elegans, S. gigantea, and S. glaucescens; formerly it was included within S. malviflora; molecular study has shown that it is different from S. malviflora. It belongs to a group including S. celata, S. elegans, S. gigantea, and S. hirtipes (K. Andreasen and B. G. Baldwin 2003).

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

Sidalcea multifida is generally a low-growing plant of high elevations, and usually can be distinguished by its highly glaucous, waxy, generally erect stems and leaves, and the generally basal and persistent seven- to nine-lobed leaf blades with pinnate or ternate lobes. It has been confused with S. glaucescens, to which it appears to be closely related and of which it may be found to be a variant or subspecies; as in S. glaucescens, the narrow inflorescence is often slightly curved between flowers. Sidalcea multifida can generally be distinguished from S. glaucescens by its seven- to nine-lobed leaf blades with more finely divided, ternate lobes, persisting basal leaves, range, and more erect habit. It occurs in Alpine, Mono, and Tulare counties in California, and from Lyon to Washoe counties in Nevada.

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

Key
1. Plants (0.3–)0.5–1(–1.2) m, with caudex or usually compact rootstocks or rhizomes to 10(–30) cm × 4 mm; leaves mostly cauline; inflorescences 8–15 (–30)-flowered, erect; stems erect, sometimes weak and supported by other vegetation, sometimes proximally decumbent.
subsp. asprella
1. Plants 0.1–0.3(–0.4) m, with rhizomes 5–20 cm × 2(–3) mm; leaves mostly basal; inflorescences usually 2–10(–19)-flowered, ascending; stems decumbent-ascending to erect, sometimes proximally prostrate.
subsp. nana
Source FNA vol. 6, p. 325. Treatment author: Steven R. Hill. FNA vol. 6, p. 345. Treatment author: Steven R. Hill.
Parent taxa Malvaceae > subfam. Malvoideae > Sidalcea Malvaceae > subfam. Malvoideae > Sidalcea
Sibling taxa
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. 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. nelsoniana, S. neomexicana, S. oregana, S. pedata, S. ranunculacea, S. reptans, S. robusta, S. setosa, S. sparsifolia, S. stipularis, S. virgata
Subordinate taxa
S. asprella subsp. asprella, S. asprella subsp. nana
Synonyms S. malviflora subsp. asprella
Name authority Greene: Bull. Calif. Acad. Sci. 1: 78. (1885) Greene: Cybele Columb. 1: 34. (1914)
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