Arabis pycnocarpa var. pycnocarpa

Synonyms: Arabis hirsuta var. minshallii M. Hopkins Arabis pycnocarpa var. reducta
Treatment appears in FNA Volume 7. Treatment on page 260. Mentioned on page 261.

Stems usually hirsute basally, rarely glabrescent, trichomes often simple, sometimes branched. Basal leaves: blade surfaces sparsely to densely pubescent, trichomes simple and stalked. Fruits (3.5–) 4–5.8 (–6) cm; style (0.2–) 0.5–1 mm, (rarely stout). 2n = 32.


Phenology: Flowering Mar–Jul.
Habitat: Bluffs, cliffs, ledges, rocky hillsides, open woods, bottom lands, gravel bars, meadows, streamsides, upland prairies, grassy swales, hillsides, stream bottoms
Elevation: 0-2500 m

Distribution

V7 342-distribution-map.gif

Alta., B.C., Man., N.B., Nfld. and Labr. (Labr.), N.W.T., N.S., Ont., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Conn., Idaho, Iowa, Kans., Maine, Mass., Mich., Minn., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Oreg., Pa., S.Dak., Utah, Vt., Va., W.Va., Wis., Wyo., Asia (China), Asia (Japan), Asia (Russian Far East)

Discussion

Some populations in northern Indiana and northern Illinois, [e.g., Herman 8790 (Jo Davies County) and Friesner 19072 (Elkhart County), both at GH] most likely represent hybrids between the two varieties of Arabis pycnocarpa. Trichomes borne proximally on stems of these plants are a mixture of forked and simple. It is expected that hybrids can be found where the ranges of the two taxa overlap.

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.

0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Obtuse (?) +  and Acute (?) +
Ihsan A. Al-Shehbaz +
M. Hopkins +
sessile +  and petiolate +
auriculate +  and subcordate +
appendaged +  and unappendaged +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
lyrate-pinnatifid +, dentate to denticulate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
ovate;oblong or lanceolate +
much smaller +  and reduced +
3mm;20mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
petiolate +  and sessile +
well-developed +
distinct +
differentiated +
emarginate +  and entire +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Iowa +, Kans. +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, S.Dak. +, Utah +, Vt. +, Va. +, W.Va. +, Wis. +, Wyo. +, Asia (China) +, Asia (Japan) +  and Asia (Russian Far East) +
0-2500 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
actinomorphic +
latiseptate +  and unsegmented +
6 cm60 mm <br />0.06 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
5.8 cm58 mm <br />0.058 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
indehiscent +  and dehiscent +
erect +  and erect-ascending +
torulose +
4 cm40 mm <br />0.04 m <br /> (5.8 cm58 mm <br />0.058 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
latiseptate +, stipitate +  and sessile +
flattened +  and torulose +
Bluffs, cliffs, ledges, rocky hillsides, open woods, bottom lands, gravel bars, meadows, streamsides, upland prairies, grassy swales, hillsides, stream bottoms +
annular +  and semiannular +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
entire +  and dentate +
dentate;repand;dentate;repand;entire +
prominent +  and obscure +
sessile +  and stalked +
forked +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.5 cm5 mm <br />0.005 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rudimentary +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Mar–Jul. +
trinucleate +  and 3(-11)-colpate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
elongated +
erect +  and erect-ascending +
slender +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
mucilaginous +
uniseriate +  and biseriate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
not +  and mucilaginous +
White (?) +, Black (?) +, Brown (?) +  and Yellow (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
suborbicular +  and oblong +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
persistent +  and caducous +
distinct +
ascending +  and erect +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
reduced +
latiseptate +  and unsegmented +
indehiscent +  and dehiscent +
latiseptate +  and unsegmented +
indehiscent +  and dehiscent +
tetradynamous +
branched +  and simple +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
glabrescent +, hirsute +  and pubescent +
Arabis hirsuta var. minshallii +  and Arabis pycnocarpa var. reducta +
Arabis pycnocarpa var. pycnocarpa +
Arabis pycnocarpa +
variety +
stalked +, simple +  and branched +
stellate +  and forked +
coiled +, 1-7-veined +  and veined +
anastomosing +
perennial +  and biennial +
hirsute +  and glabrescent +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0mm;0.2mm +