Lewisia longipetala

(Piper) S. Clay

Present-day Rock Gard., xx, 341. 1937.

EndemicConservation concern
Basionym: Oreobroma longipetalum Piper Contr. U.S. Natl. Herb. 16: 207. 1913 (as longipet ala)
Synonyms: Lewisia pygmaea subsp. longipetala (Piper) Ferris
Treatment appears in FNA Volume 4. Mentioned on page 481.

Taproots gradually ramified distally. Stems 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 or channeled adaxially, 2.5–6 cm, margins entire, apex acute; cauline leaves absent. Inflorescences 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, 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 8 mm. Seeds 20–50, 1.5 mm, dullish, minutely granular. 2n = ca. 22.


Phenology: Flowering mid-late summer.
Habitat: Rock crevices or damp scree near melting snow
Elevation: 2600 m

Discussion

Of conservation concern.

Lewisia longipetala is known only from the northern Sierra Nevada in Eldorado and Placer counties.

Selected References

None.

Lower Taxa

None.
... more about "Lewisia longipetala"
Mark A. Hershkovitz +  and Sean B. Hogan +
(Piper) S. Clay +
Oreobroma longipetalum +
2600 m +
Rock crevices or damp scree near melting snow +
Flowering mid-late summer. +
Present-day Rock Gard., xx, +
Endemic +  and Conservation concern +
Lewisia pygmaea subsp. longipetala +
Lewisia longipetala +
species +