Arabis alpina

Linnaeus

Sp. Pl. 2: 664. 1753.

Synonyms: Arabis alpina var. glabrata A. Blytt
Treatment appears in FNA Volume 7. Treatment on page 259. Mentioned on page 258.

Perennials; (stoloniferous, with vegetative rosettes, loosely cespitose to somewhat pulvinate); sparsely to moderately pubescent, trichomes stalked, cruciform, stellate, mixed with simple and forked-stalked ones. Stems usually simple from base, erect to ascending, often branched proximally, (0.6–) 1–2 (–2.5) dm. Basal leaves: petiole 0–1 cm; blade spatulate, oblanceolate, oblong, or obovate, (0.4–) 1–4 (–5) cm × (3–) 6–15 (–20) mm, margins dentate to denticulate, apex obtuse or acute, surfaces usually pubescent, rarely subglabrate, trichomes stellate with simple rays. Cauline leaves 3–5 (–6); blade oblong or ovate, 1–3 cm × 5–15 mm, base subcordate or auriculate, margins usually dentate, rarely subentire, apex acute or obtuse. Racemes simple, (lax). Fruiting pedicels ascending to divaricate, 4–10 (–12) mm. Flowers: sepals oblong, 2.5–4 (–4.7) × 1–2 mm, lateral pair conspicuously saccate basally; petals white, spatulate to obovate, 5–8 (–9) × 2–3.5 mm, apex obtuse; filaments 3–5 mm; anthers oblong, 0.7–1.2 mm. Fruits ascending to spreading, torulose, 1.7–3.5 (–4) cm × 1–1.7 mm; valves each with midvein absent or obscure, along proximal 1/2; ovules 34–50 per ovary; style 0.3–0.6 mm. Seeds narrowly winged throughout, ovate, 1–1.4 × 0.9–1.1 mm; wing 0.1–0.2 mm wide. 2n = 16.


Phenology: Flowering Jun–Aug.
Habitat: Crevices of limestone rocks, along streams, calcareous alpine meadows, Salix scrub on slopes with scree
Elevation: 0-2400 m

Distribution

V7 339-distribution-map.gif

Greenland, Nfld. and Labr., Nunavut, Que., N.Y., Wash., Europe, sw Asia, n, tropical Africa

Discussion

Arabis alpina, the generic type, is variable. It is cultivated extensively for its attractive flowers, and it sometimes escapes from cultivation. There is disagreement as to whether one or more species should be recognized in this complex. European, some African, and most North American plants are recognized as A. alpina; most of the larger-flowered, southwestern Asian plants, which are most commonly cultivated, are recognized as A. caucasica or as A. alpina subsp. caucasica (Willdenow) Briquet. In my opinion, the morphological differences between the two (see key, couplet 3) support recognition of two species, as did R. C. Rollins (1993) and G. A. Mulligan (1996).

Selected References

None.

Lower Taxa

None.

"elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Arabis alpina"
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Obtuse (?) +  and Acute (?) +
Ihsan A. Al-Shehbaz +
Linnaeus +
sessile +  and petiolate +
auriculate +  and subcordate +
appendaged +  and unappendaged +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lyrate-pinnatifid +, dentate to denticulate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
ovate;oblong;obovate;oblong;obovate;oblong;oblanceolate;spatulate +
much smaller +  and reduced +
5mm;15mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
petiolate +  and sessile +
well-developed +
distinct +
differentiated +
emarginate +  and entire +
Greenland +, Nfld. and Labr. +, Nunavut +, Que. +, N.Y. +, Wash. +, Europe +, sw Asia +, n +  and tropical Africa +
0-2400 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
actinomorphic +
latiseptate +  and unsegmented +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
indehiscent +  and dehiscent +
1.7cm;3.5cm +
ascending +  and spreading +
torulose +
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
latiseptate +, stipitate +  and sessile +
flattened +  and torulose +
Crevices of limestone rocks, along streams, calcareous alpine meadows, Salix scrub on slopes with scree +
annular +  and semiannular +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
subentire;dentate;denticulate +
prominent +  and obscure +
forked +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
rudimentary +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jun–Aug. +
trinucleate +  and 3(-11)-colpate +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
elongated +
slender +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
mucilaginous +
uniseriate +  and biseriate +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
persistent +  and caducous +
distinct +
ascending +  and erect +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
reduced +
latiseptate +  and unsegmented +
indehiscent +  and dehiscent +
latiseptate +  and unsegmented +
indehiscent +  and dehiscent +
tetradynamous +
branched +  and simple +
procumbent +  and decumbent +
erect +  and ascending +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
subglabrate +  and pubescent +
Arabis alpina var. glabrata +
Arabis alpina +
species +
cruciform +
coiled +, 1-7-veined +  and veined +
anastomosing +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.1mm;0.2mm +