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Lewisia cotyledon

cliff lewisia, cliff maids, Siskiyou lewisia

short-sepal bitter-root, short-sepal lewisia

Taproots

gradually ramified distally.

gradually ramified distally.

Stems

ascending to suberect, 10–12(–30) cm.

semiprostrate to suberect, 3–8 cm.

Leaves

basal leaves evergreen, sessile or abruptly or gradually narrowed to broad petiole, blade oblanceolate, obovate, spatulate, or rarely ± linear or ± orbiculate, ± flattened, 3–14 cm, margins entire, crisped, or toothed, apex truncate, emarginate, retuse, or rounded;

cauline leaves alternate, intergrading with bracts, blade oblong to ovate, 5–10 mm, margins glandular-toothed, apex acute to occasionally obtuse.

basal leaves withering at or immediately following anthesis, ± sessile or tapered to broad petiole, blade oblanceolate, ± flattened, 3–8 cm, margins entire, apex acute to obtuse;

cauline leaves absent.

Inflorescences

dense, paniculate to subumbellate cymes, 10–50-flowered;

bracts alternate or opposite proximally, 2 at each flowering node distally, obovate to lanceolate, 2–4 mm, margins glandular-toothed, apex acute.

flowers borne singly on peduncles;

bracts 2, ovate to broadly lanceolate, 5–7 mm, margins entire, apex acute to acuminate.

Flowers

pedicellate, not disarticulate in fruit;

sepals 2, suborbiculate to broadly ovate, 4–6 mm, herbaceous at anthesis, margins glandular-toothed, apex obtuse to truncate;

petals 7–10, usually pink-purple with pale and darker stripes, less often white, cream with pink-orange stripes, ± orange, or yellow, oblanceolate, obovate, or spatulate, (8–)12–20 mm;

stamens 5–12;

stigmas 2–4;

pedicel 2–5 mm.

sessile, not disarticulate in fruit;

sepals 2, decussate with bracts, ovate, 4–9 mm, herbaceous, margins entire, not glandular, apex acute;

petals 5–9, white, sometimes with pink veins, or pinkish, obovate, 12–26 mm;

stamens 9–15;

stigmas 5–8.

Capsules

3–5 mm.

6–9 mm.

Seeds

4–15, 1.5 mm, shiny, smooth.

40–50, 1.5 mm, shiny.

2n

= 20.

Lewisia cotyledon

Lewisia brachycalyx

Phenology Flowering late spring–early summer.
Habitat Montane meadows in sandy soil
Elevation 1300-2400 m (4300-7900 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; UT; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

The varieties occasionally co-occur. Natural hybrids with Lewisia leeana are known (see discussion under 8. L. leeana).

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

As B. Mathew (1989b) noted, plants attributed to New Mexico probably were collected in Arizona.

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

Key
1. Basal leaf blade margins entire or slightly undulate, not toothed or crisped; petals (8-)12-14 mm
var. cotyledon
1. Basal leaf blade margins strongly crisped or toothed; petals 12-20 mm
→ 2
2. Basal leaf blade margins toothed.
var. heckneri
2. Basal leaf blade margins strongly crisped
var. howellii
Source FNA vol. 4, p. 480. FNA vol. 4, p. 478.
Parent taxa Portulacaceae > Lewisia Portulacaceae > Lewisia
Sibling taxa
L. brachycalyx, L. cantelovii, L. columbiana, L. congdonii, L. disepala, L. kelloggii, L. leeana, L. longipetala, L. maguirei, L. nevadensis, L. oppositifolia, L. pygmaea, L. rediviva, L. stebbinsii, L. triphylla
L. cantelovii, L. columbiana, L. congdonii, L. cotyledon, L. disepala, L. kelloggii, L. leeana, L. longipetala, L. maguirei, L. nevadensis, L. oppositifolia, L. pygmaea, L. rediviva, L. stebbinsii, L. triphylla
Subordinate taxa
L. cotyledon var. cotyledon, L. cotyledon var. heckneri, L. cotyledon var. howellii
Synonyms Calandrinia cotyledon, Oreobroma cotyledon L. brachycarpa, Oreobroma brachycalyx
Name authority (S. Watson) B. L. Robinson: in A. Gray et al., Syn. Fl. N. Amer. 1: 268. (1897) Engelmann ex A. Gray: Proc. Amer. Acad. Arts 7: 400. (1868)
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