Flora of North America species comparison

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Cardamine pattersonii

Cardamine microphylla
Cardamine pattersonii

Saddle Mountain bitter-cress

small-leaf bittercress
Habit Annuals or perennials; (short-lived); glabrous throughout. Perennials; usually glabrous, rarely sparsely hirtellous.
Rhizomes

cylindrical, slender, 0.5–1.5 mm diam.

cylindrical, slender, 0.7–1.5 mm diam.
Stems

(simple from base), erect, (not flexuous), unbranched or branched basally, 0.6–3 dm.

erect or ascending, unbranched, 0.3–1.5(–2) dm.
Basal leaves

rosulate or not, 3 or 5-foliolate, 1–6 cm, leaflets petiolulate;

petiole 0.4–2.5 cm;

lateral leaflets similar to terminal, considerably smaller;

terminal leaflet (petiolule 0.1–0.4 cm), blade obovate to orbicular or subcordate, 0.3–1.5(–2.0) cm × 2.5–16(–18) mm, base obtuse to rounded or cordate, margins entire or dentate to slightly sinuately lobed.

Rhizomal leaves

pinnately 5 or 7-foliolate, (1.3–)2.5–6.5 cm, (not fleshy), leaflets petiolulate;

petiole (0.5–)1.5–5.5 cm;

lateral leaflets similar to terminal, blade sometimes smaller;

terminal leaflet (petiolule 0.15–0.7 cm), blade ovate to elliptic, (0.2–)0.4–1.2(–1.5) cm × (1–)2.5–6 mm, base cuneate to obtuse, margins entire, (apiculate).
Cauline leaves

2–4, 3 or 5-foliolate, blade similar to basal, gradually reduced in size as bract, distalmost ones subtending pedicels of flowers (usually simple);

leaflet blade or bract linear to linear-oblanceolate, 0.2–0.8 cm.

1–3, 5 or 7-foliolate, petiolate, leaflets petiolulate or subsessile;

petiole 0.2–1.5 cm, base not auriculate;

lateral leaflets similar to terminal;

terminal leaflet (subsessile or petiolule to 0.2 cm), blade ovate to elliptic, 0.6–1.3 × 0.1–0.7 cm, base cuneate, margins entire.
Racemes

bracteate throughout.

ebracteate.
Flowers

sepals oblong, (2–)3 × 0.7(–1) mm, lateral pair not saccate basally;

petals purple or pink, obovate, 6–9 × 3–4 mm, (not clawed);

filaments: median pairs 3–3.5 mm, lateral pair 2–2.5 mm;

anthers oblong, 0.7–1 mm.

sepals ovate to oblong, 3–4 × 1.8–2.5 mm, lateral pair slightly saccate basally;

petals usually white, rarely lavender, broadly obovate, 7–10 × 3–6 mm, (clawed, apex rounded);

filaments: median pairs 3–4.5 mm, lateral pair 2–3 mm;

anthers oblong, 1–1.5 mm.
Fruiting pedicels

divaricate-ascending, (10–)15–30(–45) mm.

erect to ascending, 7–15(–25) mm.
Fruits

linear, (torulose), 2–3 cm × 1–1.5 mm;

ovules 14–20 per ovary;

style 2–4 mm.

linear, 2–3 cm × 1.2–1.7 mm;

ovules 12–16 per ovary;

style 1–2 mm.
Seeds

brown, oblong to ovoid, 1.7–2.2 × 1–1.5 mm, (winged distally).

brown, oblong, ca. 1.5 × 1 mm.
2n

= 28, 42, 64.

Cardamine pattersonii

Cardamine microphylla
Phenology Flowering May–Jun. Flowering Jul–Aug.
Habitat Moist mossy cliffs, rocky slopes, mossy banks Streamsides, sand and cobbles on gravel bars, shale banks, floodplains, alluvial sand between cobbles, moist moss, turf, seepage areas, meadows, wet grounds
Elevation 800-900 m (2600-3000 ft) 0-1600 m (0-5200 ft)
Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; NT; YT; e Asia (Russian Far East, Siberia)
[BONAP county map]
Discussion

Of conservation concern.

Cardamine pattersonii is known from Saddle Mountain and Onion Peak in Clastop County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 480. FNA vol. 7, p. 477.
Parent taxa Brassicaceae > tribe Cardamineae > Cardamine Brassicaceae > tribe Cardamineae > Cardamine
Sibling taxa
C. angulata, C. angustata, C. bellidifolia, C. blaisdellii, C. breweri, C. bulbosa, C. californica, C. clematitis, C. concatenata, C. constancei, C. cordifolia, C. digitata, C. diphylla, C. dissecta, C. douglassii, C. flagellifera, C. flexuosa, C. hirsuta, C. holmgrenii, C. impatiens, C. longii, C. macrocarpa, C. maxima, C. micranthera, C. microphylla, C. nuttallii, C. nymanii, C. occidentalis, C. oligosperma, C. pachystigma, C. parviflora, C. penduliflora, C. pensylvanica, C. pratensis, C. purpurea, C. rotundifolia, C. rupicola, C. umbellata
C. angulata, C. angustata, C. bellidifolia, C. blaisdellii, C. breweri, C. bulbosa, C. californica, C. clematitis, C. concatenata, C. constancei, C. cordifolia, C. digitata, C. diphylla, C. dissecta, C. douglassii, C. flagellifera, C. flexuosa, C. hirsuta, C. holmgrenii, C. impatiens, C. longii, C. macrocarpa, C. maxima, C. micranthera, C. nuttallii, C. nymanii, C. occidentalis, C. oligosperma, C. pachystigma, C. parviflora, C. pattersonii, C. penduliflora, C. pensylvanica, C. pratensis, C. purpurea, C. rotundifolia, C. rupicola, C. umbellata
Synonyms C. minuta
Name authority L. F. Henderson: Rhodora 32: 25. (1930) Adams: Mém. Soc. Imp. Naturalistes Moscou 5: 111. (1817)
Web links 
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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