Lewisia nevadensis |
Lewisia longipetala |
|
---|---|---|
Nevada bitterroot, Nevada lewisia, Sierra lewisia |
long-petal lewisia, Truckee lewisia |
|
Taproots | napiform to shortly fusiform. |
gradually ramified distally. |
Stems | suberect, becoming horizontal or deflexed after anthesis, base subterranean, 5–12 cm. |
procumbent, 3–6 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. |
basal leaves withering at or soon after anthesis, gradually narrowed to broad petiole, blade narrowly linear to linear-oblanceolate, flattened or channeled adaxially, 2.5–6 cm, margins entire, apex acute; 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. |
usually with flowers borne singly, sometimes 2–3-flowered racemose cymes; bracts 2, opposite, plus 1 subtending each successive flower if 2 or more flowers present, lanceolate, 5 mm, margins glandular-toothed, 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. |
pedicellate, not disarticulate in fruit, 2.5–4 cm diam.; sepals 2, broadly obovate, 4–10 mm, herbaceous at anthesis, margins glandular-toothed, apex rounded to truncate; petals 5–10, white to very pale pink, often with reddish glands at apex, narrowly elliptic-oblong, 11–20 mm; stamens 7–9; stigmas 5–6; pedicel 10–25 mm. |
Capsules | 5–10 mm. |
8 mm. |
Seeds | 20–50, 1.3 mm, shiny, muricate. |
20–50, 1.5 mm, dullish, minutely granular. |
2n | = 56. |
= ca. 22. |
Lewisia nevadensis |
Lewisia longipetala |
|
Phenology | Flowering late spring–late summer. | Flowering mid-late summer. |
Habitat | Wet grassy slopes and meadows near springs | Rock crevices or damp scree near melting snow |
Elevation | 1300-3200 m (4300-10500 ft) | 2600 m (8500 ft) |
Distribution |
AZ; CA; CO; ID; NM; NV; OR; UT; WA
|
CA |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Lewisia longipetala is known only from the northern Sierra Nevada in Eldorado and Placer counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 4. | FNA vol. 4. |
Parent taxa | Portulacaceae > Lewisia | Portulacaceae > Lewisia |
Sibling taxa | ||
Synonyms | Calandrinia nevadensis, Claytonia grayana, L. bernardina, L. pygmaea var. nevadensis, Oreobroma nevadense | Oreobroma longipetalum, L. pygmaea subsp. longipetala |
Name authority | (A. Gray) B. L. Robinson: in A. Gray et al., Syn. Fl. N. Amer. 1: 268. (1897) | (Piper) S. Clay: Present-day Rock Gard., xx, 341. (1937) |
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