Flora of North America species comparison

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Cardamine blaisdellii
Habit Perennials; usually glabrous throughout, rarely pilose.
Rhizomes

cylindrical, slender, 0.7–1.5 mm diam.
Stems

erect or ascending, unbranched, 0.5–2(–2.5) dm.
Rhizomal leaves

pinnately 5- or 7-foliolate, 2.5–12 cm (not fleshy), leaflets petiolulate;

petiole 1.5–4(–9) cm;

lateral leaflets similar to terminal, or smaller and margins usually toothed, rarely entire;

terminal leaflet (petiolule 0.15–0.3 cm) blade suborbicular to broadly obovate, 0.4–1.5 cm × 2.5–14 mm, base obtuse to subcordate, margins 3–5-toothed, (apiculate).
Cauline leaves

1–3, (3–)5-foliolate (alternate), petiolate, leaflets petiolulate or subsessile;

petiole 0.2–2(–6.5) cm, base not auriculate;

lateral leaflets similar to terminal;

terminal leaflet subsessile or petiolulate (to 0.2 cm), blade obovate to oblanceolate, 0.5–1.5 cm × 3–10 mm, base cuneate, margins 3-toothed or entire.
Racemes

ebracteate.
Flowers

sepals oblong, 2–3.5 × 2–2.5 mm, lateral pair slightly saccate basally;

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

filaments: median pairs 3–4 mm, lateral pair 2–3 mm;

anthers oblong, 1–1.5 mm.
Fruiting pedicels

erect to ascending, 0.7–22 mm.
Fruits

linear, 1.6–4 cm × 1–1.3 mm;

ovules 14–24 per ovary;

style 0.7–3 mm.
Seeds

brown, oblong, ca. 1.5 × 1 mm.
2n

= 28, 42.

Cardamine blaisdellii
Phenology Flowering Jul–Aug.
Habitat Moist streamsides, meadows, river gravel, mesic grounds, wet tundra, moist humus, scree slopes, calcareous fellfields
Elevation 50-1000 m (200-3300 ft)
Distribution
from FNA
AK; n Europe; e Europe (Russian Far East, Siberia)
[BONAP county map]
Discussion

Cardamine blaisdellii was treated by R. C. Rollins (1993) as a synonym of C. microphylla, but the morphological differences (see key) and molecular data (R. B. Jørgensen et al., 2008) clearly demonstrate that they are distinct.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 468.
Parent taxa Brassicaceae > tribe Cardamineae > Cardamine
Sibling taxa
C. angulata, C. angustata, C. bellidifolia, 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. pattersonii, C. penduliflora, C. pensylvanica, C. pratensis, C. purpurea, C. rotundifolia, C. rupicola, C. umbellata
Synonyms C. microphylla subsp. blaisdellii, C. microphylla var. blaisdellii
Name authority Eastwood: Bot. Gaz. 33: 146. (1902)
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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