Flora of North America species comparison

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Draba novolympica

Draba californica

Mt. Olympic Draba, Olympic Draba, Olympic Mountains Draba, Payson's Draba, Payson's whitlow-grass, Trelease's Draba, Trelease's whitlow-grass

California Draba
Habit Perennials; (cespitose, densely pulvinate); caudex branched (covered with persistent leaves, branches creeping, sometimes terminating in sterile rosettes); scapose. Perennials; (short-lived); caudex simple or branched; sometimes scapose.
Stems

unbranched, 0.05–0.4 dm, densely pubescent throughout, trichomes simple, 0.4–0.8 mm, and stalked, 2–5-rayed, 0.1–0.5 mm.

unbranched or branched (few), (0.2–)0.4–0.9(–1.2) dm, pubescent throughout, trichomes stellate, 4–8-rayed, 0.05–0.5 mm.
Basal leaves

(densely imbricate); rosulate;

sessile;

blade oblong to linear-oblanceolate, 0.2–0.8 cm × 0.5–1.5 mm, margins entire, (ciliate, trichomes simple and spurred, 0.3–1.2 mm), surfaces densely pubescent, abaxially with stalked, 2–12-rayed stellate trichomes, 0.1–0.6 mm, adaxially with simple and 2-rayed ones, 0.3–0.8 mm.

rosulate; shortly petiolate;

petiole ciliate, margin not ciliate, (trichomes simple and 2-rayed, 0.3–1 mm);

blade oblanceolate, 0.6–2 cm × 1.5–4(–6) mm, margins entire, surfaces pubescent with short-stalked, 4–8-rayed trichomes, 0.1–0.4 mm.
Cauline leaves

0.

0–3;

sessile;

blade ovate to oblong, margins entire, surfaces pubescent as basal.
Racemes

2–12-flowered, ebracteate, slightly elongated in fruit;

rachis not flexuous, pubescent as stem.

3–13-flowered, ebracteate, elongated in fruit;

rachis not flexuous, pubescent as stem.
Flowers

sepals oblong, 1.5–2.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed);

petals bright yellow, oblanceolate to spatulate, 2–3.5(–4) × 1.5–2 mm;

anthers oblong, 0.5–0.6 mm.

sepals (persistent until fruit maturity), oblong to ovate, 1.7–2.5 mm, pubescent, (trichomes short-stalked, 2–5-rayed);

petals white or creamy white, spatulate to oblanceolate, 2.2–3 × 0.8–1 mm;

anthers ovate, 0.2–0.35 mm.
Fruiting pedicels

divaricate-ascending, straight, 1–5 mm, pubescent, trichomes simple (0.3–0.9 mm) and stalked, 2–5-rayed (0.1–0.5 mm).

ascending to divaricate-ascending, straight, (2–)4–9(–12) mm, pubescent, trichomes short-stalked, 4–8-rayed, (0.1–0.4 mm).
Fruits

often ovoid, plane, slightly inflated basally (symmetric), (2.5–)3–4(–5) × 1.5–3.5 mm;

valves densely pubescent, trichomes 2–6-rayed, 0.05–0.4 mm, occasionally some simple;

ovules 4–8(–12) per ovary;

style 0.2–0.6(–0.8) mm.

lanceolate to oblong, plane, slightly flattened, (5–)6–9(–11) × 1.8–2.5 mm;

valves usually pubescent, rarely glabrous, trichomes simple and short-stalked, 2- or 3-rayed, 0.05–0.25 mm;

ovules 22–32 per ovary;

style 0.1–0.3(–0.4) mm.
Seeds

oblong, 1.2–1.8 × 0.8–1.1 mm.

oblong, 0.8–1 × 0.5–0.6 mm.
2n

= 42.

Draba novolympica

Draba californica
Phenology Flowering Jun–Aug. Flowering Jun–Aug.
Habitat Alpine crests, open knolls, fellfields, talus, weathered shale, calcareous shale scree, rocky grounds and cliffs, subalpine conifer forests Grassy meadows, alpine areas, fellfields
Elevation 1500-3700 m (4900-12100 ft) 3200-4000 m (10500-13100 ft)
Distribution
from FNA
CA; ID; MT; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV
[BONAP county map]
Discussion

Draba novolympica is the same taxon that C. L. Hitchcock (1941) and R. C. Rollins (1993) called D. paysonii var. treleasei, and G. A. Mulligan (2002) called D. paysonii. The two are amply distinct and should be recognized as separate species. Draba novolympica is easily distinguished from D. paysonii by having fruit valves pubescent with 2–6-rayed (occasionally some simple) trichomes 0.05–0.4 mm, sepals 1.5–2.5 mm, petals 2–3.5(–4) × 1.5–2 mm, fruits (2.5–)3–4(–5) × 1.5–3.5 mm, styles 0.2–0.6(–0.8) mm, and ovules 1.2–1.8 × 0.8–1.1 mm. By contrast, D. paysonii has fruit valves pubescent with simple and 2-rayed (some 4- or 5-rayed) trichomes (0.2–)0.4–1 mm, sepals 2.8–3.5 mm, petals (4–)5–6 × (1.5–)2–3 mm, fruits (5–)6–9 × (3–)3.5–5 mm, styles (0.6–)0.8–1.2 mm, and ovules 1.7–2.2 × 1–1.4 mm.

Both R. C. Rollins (1993) and N. H. Holmgren (2005b) indicated that Draba novolympica (as D. paysonii var. treleasei) occurs in Alaska and Yukon, but we have not seen any material from there, and it is likely that their records were based on misidentified plants. Previous reports of D. paysonii from Canada (e.g., G. A. Mulligan 1971b) pertain instead to D. novolympica.

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

Although originally treated as a variety of Draba cuneifolia, D. californica is but distantly related to that species. Instead, ongoing studies (L. Allphin and M. D. Windham, unpubl.) suggest that it may be an allopolyploid resulting from hybridization between D. albertina and D. breweri. The species is restricted to the White Mountains in Mono County, California, and adjacent Esmeralda County, Nevada.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 323. FNA vol. 7, p. 298.
Parent taxa Brassicaceae > tribe Arabideae > Draba Brassicaceae > tribe Arabideae > Draba
Sibling taxa
D. abajoensis, D. albertina, D. aleutica, D. alpina, D. aprica, D. arabisans, D. arctica, D. arctogena, D. argyrea, D. arida, D. asprella, D. asterophora, D. aurea, D. aureola, D. bifurcata, D. borealis, D. brachycarpa, D. brachystylis, D. breweri, D. burkei, D. californica, D. cana, D. carnosula, D. chamissonis, D. cinerea, D. corrugata, D. corymbosa, D. crassa, D. crassifolia, D. cruciata, D. cuneifolia, D. cusickii, D. cyclomorpha, D. daviesiae, D. densifolia, D. exunguiculata, D. fladnizensis, D. glabella, D. globosa, D. graminea, D. grandis, D. grayana, D. heilii, D. helleriana, D. hitchcockii, D. howellii, D. incana, D. incerta, D. incrassata, D. inexpectata, D. jaegeri, D. juvenilis, D. kassii, D. kluanei, D. lactea, D. lemmonii, D. lonchocarpa, D. longisquamosa, D. macounii, D. maguirei, D. malpighiacea, D. micropetala, D. mogollonica, D. monoensis, D. mulliganii, D. murrayi, D. nemorosa, D. nivalis, D. norvegica, D. oblongata, D. ogilviensis, D. oligosperma, D. oreibata, D. oxycarpa, D. palanderiana, D. pauciflora, D. paucifructa, D. paysonii, D. pectinipila, D. pedicellata, D. pennellii, D. petrophila, D. pilosa, D. platycarpa, D. porsildii, D. praealta, D. pterosperma, D. ramosissima, D. ramulosa, D. rectifructa, D. reptans, D. ruaxes, D. santaquinensis, D. saxosa, D. scotteri, D. serpentina, D. sharsmithii, D. sibirica, D. sierrae, D. simmonsii, D. smithii, D. sobolifera, D. spectabilis, D. sphaerocarpa, D. sphaeroides, D. standleyi, D. stenoloba, D. stenopetala, D. streptobrachia, D. streptocarpa, D. subalpina, D. subcapitata, D. subumbellata, D. trichocarpa, D. ventosa, D. verna, D. viridis, D. weberi, D. yukonensis, D. zionensis
D. abajoensis, D. albertina, D. aleutica, D. alpina, D. aprica, D. arabisans, D. arctica, D. arctogena, D. argyrea, D. arida, D. asprella, D. asterophora, D. aurea, D. aureola, D. bifurcata, D. borealis, D. brachycarpa, D. brachystylis, D. breweri, D. burkei, D. cana, D. carnosula, D. chamissonis, D. cinerea, D. corrugata, D. corymbosa, D. crassa, D. crassifolia, D. cruciata, D. cuneifolia, D. cusickii, D. cyclomorpha, D. daviesiae, D. densifolia, D. exunguiculata, D. fladnizensis, D. glabella, D. globosa, D. graminea, D. grandis, D. grayana, D. heilii, D. helleriana, D. hitchcockii, D. howellii, D. incana, D. incerta, D. incrassata, D. inexpectata, D. jaegeri, D. juvenilis, D. kassii, D. kluanei, D. lactea, D. lemmonii, D. lonchocarpa, D. longisquamosa, D. macounii, D. maguirei, D. malpighiacea, D. micropetala, D. mogollonica, D. monoensis, D. mulliganii, D. murrayi, D. nemorosa, D. nivalis, D. norvegica, D. novolympica, D. oblongata, D. ogilviensis, D. oligosperma, D. oreibata, D. oxycarpa, D. palanderiana, D. pauciflora, D. paucifructa, D. paysonii, D. pectinipila, D. pedicellata, D. pennellii, D. petrophila, D. pilosa, D. platycarpa, D. porsildii, D. praealta, D. pterosperma, D. ramosissima, D. ramulosa, D. rectifructa, D. reptans, D. ruaxes, D. santaquinensis, D. saxosa, D. scotteri, D. serpentina, D. sharsmithii, D. sibirica, D. sierrae, D. simmonsii, D. smithii, D. sobolifera, D. spectabilis, D. sphaerocarpa, D. sphaeroides, D. standleyi, D. stenoloba, D. stenopetala, D. streptobrachia, D. streptocarpa, D. subalpina, D. subcapitata, D. subumbellata, D. trichocarpa, D. ventosa, D. verna, D. viridis, D. weberi, D. yukonensis, D. zionensis
Synonyms D. barbata var. treleasei, D. paysonii var. treleasei D. cuneifolia var. californica
Name authority Payson & H. St. John: Proc. Biol. Soc. Wash. 43: 113. (1930) (Jepson) Rollins & R. A. Price: Aliso 12: 19. (1988)
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Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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