Alcea rugosa

Alefeld

Oesterr. Bot. Z. 12: 254. 1862.

Common names: Russian hollyhock
Introduced
Synonyms: Alcea novopokrovski Iljin A. taurica Iljin Althaea rugosa (Alefeld) Litvinov
Treatment appears in FNA Volume 6. Treatment on page 229. Mentioned on page 228.

Plants 1.5–2.5 m, stellate-hairy. Leaves: stipules ovate, 6–11 mm, apically 2–4-lobed; petiole equaling or longer than blade; blade ovate to ovate-orbiculate, usually 5–7-lobed 1/2 or more to midrib, often figlike, 7–15 cm, margins crenate. Inflorescences simple, flowers solitary, subsessile; bracts leaflike. Pedicels 6 mm, to 8–10 mm in fruit; involucellar bractlets 6-parted, usually 1/2–2/3 calyx length. Flowers: calyx hairy; corolla not doubled, 8–10 cm diam., petals pale-yellow, usually drying greenish, notched, narrowed to base, 5 cm; staminal column bearing anthers at apex; anthers 5-rowed when viewed from above; style 20–40-branched. Schizocarps enclosed by calyx, 2 cm diam.; mericarps (20–) 30 (–40), channeled and winged dorsally, 4–6 mm. Seeds tuberculate or not, glabrous or minutely hairy axially. 2n = 42.


Phenology: Flowering May–Oct; fruiting Jun–Oct.
Habitat: Disturbed sites, roadsides, vacant lots
Elevation: 0–300 m

Distribution

V6 408-distribution-map.jpg

Introduced; Md., Wis., e Europe, w Asia, widely

Discussion

Alcea rugosa is a showy ornamental that is becoming more frequent in cultivation because it is more resistant to hollyhock rust (Puccinia malvacearum) than A. rosea. The species is native in temperate eastern Europe in Ukraine and the Russian Federation, and to western Asia in Armenia, Azerbaijan, and Georgia. It occasionally escapes and naturalizes in disturbed temperate areas worldwide.

Selected References

None.

Lower Taxa

None.

... more about "Alcea rugosa"
pale-yellow +
stellate-pilose-hairy +
Steven R. Hill +
Alefeld +
white-pilose-hairy +
cuneate +  and cordate +
figlike +, 5-7-lobed +, ovate +  and ovate-orbiculate +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
stellate-hairy +
not inflated +
accrescent +
indehiscent +  and loculicidal +
Russian hollyhock +
paler +, darker +, yellow +, purple +, red +, pink +  and white +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
not doubled +
Md. +, Wis. +, e Europe +, w Asia +  and widely +
0–300 m +
sparse;copious +
unisexual +  and bisexual +
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 +
channeled +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
[15-]20-40-carpellate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
adnate +  and distinct +
5 cm50 mm <br />0.05 m <br /> (?) +
Flowering May–Oct +  and fruiting Jun–Oct. +
Oesterr. Bot. Z. +
hairy +  and glabrous +
not +  and tuberculate +
reniform +
persistent +
Introduced +
sessile +  and subsessile +
filiform +  and decurrent +
1-2 times number of carpels +
caducous +  and persistent +
stellate-pilose +
2-4-lobed +  and ovate +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
20-40-branched +
Alcea novopokrovski +, A. taurica +  and Althaea rugosa +
Alcea rugosa +
species +
perennial +  and biennial +
monoecious +, dioecious +  and hermaphroditic +