Sidalcea hickmanii subsp. napensis

S. R. Hill

J. Bot. Res. Inst. Texas 2: 783, fig. 1. 2008.

Common names: Napa checkerbloom
Conservation concernEndemic
Treatment appears in FNA Volume 6. Treatment on page 336. Mentioned on page 335.

Plants 0.2–0.3 (–0.4) m, with erect caudex and elongated taproot. Stems erect to ascending, usually maroon, glabrous or stellate-canescent, hairs scattered, tufted, stellate and simple. Leaves: stipules often purplish, ovate, (4–) 5–6 × 2–3 mm; petiole 0.6–0.9 cm on distalmost leaves, 1–3.6 cm on midstem leaves, to 6 cm on proximal leaves, 1/2 times to longer than blade; blade rounded, 1–1.7 (–2) × 1.5–2.5 (–3.4) cm, surfaces stellate-hairy, proximalmost rarely unlobed and margins deeply crenate; midstem blades deeply palmately 3–5 (–7) -lobed, incised ± to base, middle lobe largest, lobes narrowed to base, tips deeply few-toothed. Inflorescences open, usually unbranched, 5–25 cm; bracts paired, stipulelike, distinct, ovate, 5.5–7 × 2.3 mm, longer than pedicels, shorter than calyx. Pedicels 2 mm, obscured by bracts; involucellar bractlets 3, 5–6 (–8) mm, shorter or slightly longer than calyx. Flowers bisexual; calyx 7–10 mm, stellate-puberulent; petals pale-pink, 9–11 (–15) mm; staminal column 5 mm, minutely hairy; anthers white; stigmas 6 or 7. Schizocarps 4–5 mm diam.; mericarps 6 or 7, 1.5–2 mm, lateral walls smooth; back and margins corrugated with 2–5 wavy ridges. Seeds 1.5 mm.


Phenology: Flowering Apr–Jun.
Habitat: Chamise chaparral, rocky, rhyolitic, volcanic soil
Elevation: 400–500 m

Discussion

Of conservation concern.

Subspecies napensis is known only from a population in the inner North Coast Ranges, Napa County, and is threatened by agricultural development. It has deeply incised leaves like subsp. anomala and generally fewer and shorter stems, fewer leaves, and shorter bracts.

Selected References

None.

Lower Taxa

None.

"/2-3timesaslongasblade" is not declared as a valid unit of measurement for this property."elongated" is not a number.

rounded +
Steven R. Hill +
S. R. Hill +
0.2 cm2 mm <br />0.002 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
cordate +, truncate +  and ovate +
widest;1mm;3mm +
asymmetric +  and symmetric +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
rounded +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
distinct +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
proximalmost +
ovate +  and stipule-like +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2.3 cm23 mm <br />0.023 m <br /> (?) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
slightly longer +
shorter to slightly +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-20+-flowered +, unbranched +  and branched +
not +  and overlapping +
stellate-puberulent +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
indehiscent +  and loculicidal +
Napa checkerbloom +
400–500 m +
sparse;copious +
Chamise chaparral, rocky, rhyolitic, volcanic soil +
unbranched +  and open +
ascending +  and erect +
axillary +  and terminal +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
narrowed +
reticulate-veined +
entire +  and serrate +
1 cm10 mm <br />0.01 m <br /> (?) +  and 7 cm70 mm <br />0.07 m <br /> (?) +
corrugated +
thin +, usually wider than long +, 1cm +  and 7cm +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
wedge--shaped +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
incised +  and 3-5(-7)-lobed +
3-40-carpellate +
(1-)2-many +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
adnate +  and distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
1/2 times to longer than blade +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Flowering Apr–Jun. +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (25 cm250 mm <br />0.25 m <br />) +
J. Bot. Res. Inst. Texas +
4mm +  and 5mm +
hairy +  and glabrous +
reniform +
1.5 cm15 mm <br />0.015 m <br /> (?) +
persistent +
Conservation concern +  and Endemic +
sessile +  and subsessile +
5 cm50 mm <br />0.05 m <br /> (?) +
solid +, unbranched +  and branched +
erect;ascending +
stellate-canescent +  and glabrous +
several;many +
7 +  and 6 +
filiform +, linear +  and capitate +
1-2 times number of carpels +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unbranched +  and branched +
proximalmost +
stellate-hairy +
Hesperalcea +
elongated +
Sidalcea hickmanii subsp. napensis +
Sidalcea hickmanii +
subspecies +
few-toothed +
0.5 cm5 mm <br />0.005 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
monoecious +, dioecious +  and hermaphroditic +