Lewisia nevadensis

(A. Gray) B. L. Robinson in A. Gray et al.

in A. Gray et al., Syn. Fl. N. Amer. 1: 268. 1897.

Endemic
Basionym: Calandrinia nevadensis A. Gray Proc. Amer. Acad. Arts 8: 623. 1873
Synonyms: Claytonia grayana Kuntze Lewisia bernardina Davidson Lewisia pygmaea var. nevadensis (A. Gray) Fosberg Oreobroma nevadense (A. Gray) Howell
Treatment appears in FNA Volume 4. Mentioned on page 482.

Taproots napiform to shortly fusiform. Stems suberect, becoming horizontal or deflexed after anthesis, base subterranean, 5–12 cm. Leaves: basal leaves withering at or soon after anthesis, gradually narrowed to broad petiole, blade narrowly linear to linear-oblanceolate, flattened, 4–15 cm, margins entire, apex obtuse to subacute; cauline leaves absent. Inflorescences usually with flowers borne singly, rarely 2–3-flowered in racemose cymes; bracts 2, opposite, linear-lanceolate, 6–18 mm, margins entire, apex acute. Flowers pedicellate, not disarticulate in fruit, 0.5–2 cm diam.; sepals 2, broadly ovate, 5–13 mm, herbaceous at anthesis, margins entire or with few shallow, nonglandular teeth, apex acute to subacute; petals 5–10, white or rarely pinkish, elliptic to oblanceolate, 10–15 (–20) mm; stamens 6–15; stigmas 3–6; pedicel 10–40 mm. Capsules 5–10 mm. Seeds 20–50, 1.3 mm, shiny, muricate. 2n = 56.


Phenology: Flowering late spring–late summer.
Habitat: Wet grassy slopes and meadows near springs
Elevation: 1300-3200 m

Distribution

V4 976-distribution-map.gif

Ariz., Calif., Colo., Idaho, Nev., N.Mex., Oreg., Utah, Wash.

Discussion

Lewisia nevadensis represents one extreme of the L. pygmaea complex (see discussion under 13. L. pygmaea). Questionable geographic occurrences reflect plants that have one or more features otherwise suggestive of L. pygmaea (e.g., more elongate roots, truncate and/or toothed sepals, and colored petals); such intermediates also occur in the range of “typical” L. nevadensis (relatively robust plants with napiform roots, solitary flowers, acute sepals with entire margins, and white petals). Uncertainty respecting the affinity of specimens prevails in those from Arizona, Colorado, Idaho, and Wyoming. There are no supporting specimens from Wyoming.

B. L. Davidson (2000) noted that Lewisia nevadensis is a garden weed in Colorado; it is not clear whether or not these plants are escapes from cultivation.

The floral symmetry of Lewisia nevadensis may be somewhat elliptical, the two outer sepals and the remaining petals imbricate and opposite the sepals, giving the flowers a pinched appearance, a feature also reported for L. oppositifolia.

Selected References

None.

Lower Taxa

None.
... more about "Lewisia nevadensis"
Acute (?) +  and Subacute (?) +
Mark A. Hershkovitz +  and Sean B. Hogan +
(A. Gray) B. L. Robinson in A. Gray et al. +
ephemeral +  and evergreen +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
subterranean +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Calandrinia nevadensis +
occasionally dentate;crisped +
narrowly linear +  and linear-oblanceolate +
persistent +
linear-lanceolate +
subequal +
circumscissile +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
enlarged +
gradually +  and sessile +
whorled +, opposite +  and alternate +
subumbellate +
Ariz. +, Calif. +, Colo. +, Idaho +, Nev. +, N.Mex. +, Oreg. +, Utah +  and Wash. +
1300-3200 m +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
disarticulate in fruit +  and persistent +
Wet grassy slopes and meadows near springs +
paniculate +  and racemose +
terminal +  and axillary +
exstipulate +  and secund +
subrosulate +, rosulate +, alternate +, subopposite +  and opposite +
cauline +  and basal +
with few shallow , nonglandular teeth +  and entire +
glandular-toothed +, toothed +, entire +  and crisped +
plurilocular +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
connate +  and distinct +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
narrowly linear +  and linear-oblanceolate +
Flowering late spring–late summer. +
in A. Gray et al., Syn. Fl. N. Amer. +
estrophiolate +
Black (?) +  and Brown (?) +
1 +  and 50 +
muricate +
sculpted +
1.3 +, 20mm +  and 50mm +
persistent +
subequal +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
distinct +  and scarcely connate and/or adnate +
6 (?) +  and 15 (?) +
branched +, simple +  and scapelike +
deciduous +
deflexed +, horizontal +  and suberect +
3 +  and 6 +
Claytonia grayana +, Lewisia bernardina +, Lewisia pygmaea var. nevadensis +  and Oreobroma nevadense +
napiform;shortly fusiform +
Lewisia nevadensis +
species +
shallow +
fleshy +  and succulent +
15 +, 14 +, 13 +, 12 +, 11 +  and 10 +