Alcea rosea

Linnaeus

Sp. Pl. 2: 687. 1753.

Common names: Common hollyhock rose trémière
IllustratedIntroducedWeedy
Synonyms: Alcea ficifolia Linnaeus A. glabrata Alefeld Althaea ficifolia (Linnaeus) Cavanilles A. mexicana Kunze A. rosea (Linnaeus) Cavanilles A. rosea var. sinensis (Cavanilles) S. Y. Hu A. sinensis
Treatment appears in FNA Volume 6. Treatment on page 228. Mentioned on page 229.

Plants 1–2.5+ m, roughly stellate-hairy to hirsute. Leaves: stipules ovate, 8 mm, apically 3-lobed; petiole equaling or longer than blade; blade suborbiculate to 5–7-angled or shallowly triangular-lobed, sometimes more deeply channeled and winged dorsally, 6–8 mm. Seeds tuberculate or not, often minutely hairy. 2n = 42.


Phenology: Flowering May–Oct; fruiting Jun–Oct.
Habitat: Disturbed sites, roadsides, vacant lots
Elevation: 0–3000 m

Distribution

V6 407-distribution-map.jpg

Introduced; N.B., Ont., Que., Ariz., Calif., Colo., Conn., Del., D.C., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Asia (China), also nearly worldwide

Discussion

Alcea rosea is a showy and popular ornamental that is essentially cosmopolitan in cultivation. The species is thought to have originated in the southwestern provinces of China but is apparently not known in the wild. It occasionally escapes and naturalizes in disturbed temperate areas nearly worldwide. However, it is often difficult to determine if a given specimen was cultivated or an established adventive. Plants with more deeply lobed leaves and rose-pink flowers have been called A. ficifolia; plants in cultivation under this name are most likely a mix of A. rosea and A. rugosa or of hybrid origin.

Selected References

None.

Lower Taxa

None.
... more about "Alcea rosea"
pale-yellow +
stellate-pilose-hairy +
obtuse;acuminate +
Steven R. Hill +
Linnaeus +
white-pilose-hairy +
cuneate +  and cordate +
asymmetric +  and symmetric +
channeled +, triangular-lobed +, 5-7-angled +  and suborbiculate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
stellate-hairy +
6-7[-9]-parted +
not inflated +
accrescent +
indehiscent +  and loculicidal +
Common hollyhock +  and rose trémière +
paler +, darker +, yellow +, purple +, red +, pink +  and white +
N.B. +, Ont. +, Que. +, Ariz. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Asia (China) +  and also nearly worldwide +
0–3000 m +
sparse;copious +
unisexual +  and bisexual +
elongate +
disc--shaped +  and not inflated +
Disturbed sites, roadsides, vacant lots +
axillary +  and terminal +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
lanceolate +
entire +  and crenate-serrate +
compressed +
[15-]20-40-carpellate +
adnate +  and distinct +
Flowering May–Oct +  and fruiting Jun–Oct. +
not +  and tuberculate +
reniform +
persistent +
Illustrated +, Introduced +  and Weedy +
sessile +  and subsessile +
filiform +  and decurrent +
1-2 times number of carpels +
caducous +  and persistent +
stellate-pilose +
3-lobed +  and ovate +
8 cm80 mm <br />0.08 m <br /> (?) +
[15-]20-40-branched +
Alcea ficifolia +, A. glabrata +, Althaea ficifolia +, A. mexicana +, A. rosea +, A. rosea var. sinensis +  and A. sinensis +
Alcea rosea +
species +
perennial +  and biennial +
roughly stellate-hairy +  and hirsute +
monoecious +, dioecious +  and hermaphroditic +