Cardamine douglassii

Britton

Trans. New York Acad. Sci. 9: 8. 1889.

Endemic
Basionym: Arabis rhomboidea var. purpurea Torrey Amer. J. Sci. Arts 4: 66. 1822
Synonyms: Dentaria douglassii (Britton) Greene Dracamine purpurea (Torrey) Nieuwland Thlaspi tuberosum Nuttall
Treatment appears in FNA Volume 7. Treatment on page 473. Mentioned on page 465.

Perennials; hirsute throughout or glabrous proximally. Rhizomes (tuberous at stem base), subglobose, (lobed or not), (3–) 4–10 mm diam., (fleshy). Stems erect, unbranched, (0.7–) 1–2.5 (–3) dm, sparsely to densely hirsute, or glabrous basally, (trichomes (0.2–) 0.3–0.6 (–0.8) mm). Rhizomal leaves simple, (3–) 5–15 (–18) cm; petiole (2–) 4–12 (–16) cm; blade often orbicular to cordate, sometimes reniform or ovate, (1–) 2–6 cm × (7–) 17–50 mm, base obtuse to cordate, margins repand or entire. Cauline leaves 3–6 (–8), simple, petiolate or sessile; (middle) shortly petiolate or (distal) sessile, base not auriculate; blade oblong to ovate or lanceolate, 2–5 cm × 5–25 mm, margins entire, repand, or coarsely dentate. Racemes ebracteate. Fruiting pedicels ascending to divaricate, (10–) 15–35 (–50) mm, sparsely pubescent or glabrous. Flowers: sepals oblong, 2.5–4 (–6) × 1.5–2.5 mm, lateral pair not saccate basally, (surfaces often hirsute); petals usually rose-purple to pink, rarely white, obovate, (7–) 8–13 (–15) × 3–5 mm, (short-clawed, apex rounded); filaments: median pairs 4–7 mm, lateral pair 2–4 mm; anthers oblong, 1.3–1.7 mm. Fruits linear, (1.5–) 2–4 cm × 1.5–2 mm; ovules 10–16 per ovary; style 2–5 mm. Seeds brown, oblong to ovoid, 1.7–2.5 × 1–5 mm. 2n = 56, 64, 96, 112, 144.


Phenology: Flowering Mar–May.
Habitat: Rich woods, bluffs, mesic bottomland forests, rocky hillsides, floodplains, seepage of bogs, springy areas
Elevation: 50-400 m

Distribution

V7 724-distribution-map.gif

Ont., Ala., Conn., D.C., Ill., Ind., Iowa, Ky., Md., Mass., Mich., Minn., Mo., N.J., N.Y., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

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... more about "Cardamine douglassii"
144 +, 112 +, 96 +, 64 +  and 56 +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
Ihsan A. Al-Shehbaz +, Karol Marhold +  and Judita Lihová +
Britton +
not auriculate +, obtuse +  and cordate +
Arabis rhomboidea var. purpurea +
appendaged +  and unappendaged +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
compound +  and trifoliolate +
lobed +, 1-3-pinnatisect +, toothed +  and entire +
oblong;ovate or lanceolate +
much smaller +  and reduced +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +, petiolate +  and simple +
well-developed +
distinct +
differentiated +
emarginate +  and entire +
Ont. +, Ala. +, Conn. +, D.C. +, Ill. +, Ind. +, Iowa +, Ky. +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Va. +, W.Va. +  and Wis. +
50-400 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
lateral +  and median +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
actinomorphic +
not basally +  and saccate +
lilac;purple;lilac;purple;pink;white +
ascending +, spreading +  and erect +
oblanceolate +, spatulate +, obovate +, oblong +  and ovate +
latiseptate +  and unsegmented +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
angustiseptate +, 4-angled +  and terete +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
latiseptate +  and sessile +
torulose +, lanceolate +, oblong +  and linear +
Rich woods, bluffs, mesic bottomland forests, rocky hillsides, floodplains, seepage of bogs, springy areas +
semiannular +  and annular +
compound +, pinnately +, trifoliolate +  and simple +
alternate +, not +  and rosulate +
basal +  and cauline +
connate +  and distinct +
decurrent +
dentate;repand;dentate;repand;entire;entire;repand +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
white +, usually rose-purple +  and pink +
8mm;13mm +
rudimentary +
obovate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
12 cm120 mm <br />0.12 m <br /> (16 cm160 mm <br />0.16 m <br />) +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Flowering Mar–May. +
trinucleate +  and 3(-11)-colpate +
Trans. New York Acad. Sci. +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
glabrous +  and pubescent +
stout +  and slender +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
flattened +
15 cm150 mm <br />0.15 m <br /> (18 cm180 mm <br />0.18 m <br />) +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
subglobose +
not +  and mucilaginous +
winged +  and margined +
uniseriate +  and biseriate +
not +  and mucilaginous +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
oblong +  and ovoid +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
persistent +  and caducous +
distinct +
erect +  and spreading or ascending +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
reduced +
latiseptate +  and unsegmented +
angustiseptate +, 4-angled +  and terete +
latiseptate +  and unsegmented +
angustiseptate +, 4-angled +  and terete +
tetradynamous +
procumbent +  and decumbent +
prostrate +  and decumbent +
glabrous +  and hirsute +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Dentaria douglassii +, Dracamine purpurea +  and Thlaspi tuberosum +
Cardamine douglassii +
Cardamine +
species +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
scale-like +  and forked +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
pubescent +, , +  and glabrous +
anastomosing +
glabrous +  and hirsute +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +