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Brief Summary

    Parietaria judaica: Brief Summary
    provided by wikipedia

    Parietaria judaica, with common names spreading pellitory or pellitory of the wall, is a species of herbaceous perennial plant in the family Urticaceae, commonly nicknamed sticky-weed. The plant's pollen is highly allergenic. In Australia it is also known as asthma weed, due to the high incidence of allergy. It is unrelated to the herb pellitory (Anacyclus pyrethrum). It is easily confused with the very similar species Parietaria officinalis.

Comprehensive Description

    Parietaria judaica
    provided by wikipedia

    Parietaria judaica, with common names spreading pellitory or pellitory of the wall, is a species of herbaceous perennial plant in the family Urticaceae, commonly nicknamed sticky-weed. The plant's pollen is highly allergenic.[2] In Australia it is also known as asthma weed, due to the high incidence of allergy.[3] It is unrelated to the herb pellitory (Anacyclus pyrethrum). It is easily confused with the very similar species Parietaria officinalis.[4]

    Etymology

    Parietaria (Latin): Wall-dweller (a name used by the Roman naturalist and philosopher Pliny). Judaica (Latin): Of Judaea, Jewish, from Palestine.[5]

    Description

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    Close-up on flowers of Parietaria judaica

    The biological form of Parietaria judaica is hemicryptophyte scapose, as its overwintering buds are situated just below the soil surface and the floral axis is more or less erect. This plant has pink or red hairy stems, woody at the base. It reaches on average a height of 60 centimetres (24 in). The leaves are hairy, alternate, simple, entire and green, with smooth margins. The tiny white or pink flowers are attached to the stems. They are bisexual or unisexual, produced in clusters of three to many together in the leaf axils. The nickname sticky-weed is due to the adherent quality of the flowers and of the hairy stems; unlike some related species of the family Urticaceae, the hairs do not sting. The flowering period extends from spring through autumn, when it produces large amounts of pollen. The fruits are blackish achenes.

    Distribution

    Parietaria judaica is a native of Europe, central and western Asia and northern Africa.[6]

    Allergy

    Causes allergic reactions in some people.[6][7]

    Habitat

    Generally considered a weed, it is often found on roadsides, along dry stone walls and in cracks of buildings and rock faces. However, it might useful in a habitat garden within its native range, as it is a larval food plant for red admiral butterflies. It is the host plant for the larvae of butterflies of the genus Vanessa. The ideal habitat is the dry places, at an altitude of 0–1,000 metres (0–3,281 ft) above sea level.

    Gallery

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      Parietaria judaica habit on wall

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      Plant of Parietaria judaica

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      Stem and flowers of Parietaria judaica

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      Leaf of Parietaria judaica

    References

    1. ^ "Parietaria judaica", The Plant List, retrieved 2013-11-02.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
    2. ^ Stumvoll S, Westritschnig K, Lidholm J, Spitzauer S, Colombo P, Duro G, Kraft D, Geraci D, Valenta R (May 2003). "Identification of cross-reactive and genuine Parietaria judaica pollen allergens". J. Allergy Clin. Immunol. 111 (5): 974–9. PMID 12743560.
    3. ^ Sydney Weeds Archived 2009-11-16 at the Wayback Machine.
    4. ^ Townsend, C.C. (1968). "Parietaria officinalis and P. judaica" (PDF). Watsonia. 6: 6. Archived from the original (PDF) on 2011-07-26.
    5. ^ http://www.cretanflora.com/parietaria_judaica.html
    6. ^ a b http://weeds.dpi.nsw.gov.au/Weeds/Details/103
    7. ^ Ferrer, M.; Burches, E.; Peláez, A.; Muñoz, A.; Hernández, D.; Basomba, A.; Enrique, E.; Alonso, R.; Cisteró-Bahima, A.; Martín, S.; Rico, P.; Gandarias, B. (2005). "Double-blind, placebo-controlled study of immunotherapy with Parietaria judaica: Clinical efficacy and tolerance" (PDF). J Invest Allergol Clin Immunol. 15 (4): 283–292.

Distribution

    Distribution
    provided by eFloras
    S. Europe, N. Africa, C. Asia, Afghanistan, Himalaya (Kashmir, Nepal), Siberia, Tibet, W. China.
    Distribution
    provided by eFloras
    Distribution: India, Pakistan, Afghanistan, westwards to North Africa and southern Europe.
    Distribution
    provided by eFloras
    introduced; Calif., Fla., La., Mich., N.J., N.Y., Pa., Tex.; Eurasia; n Africa.

Morphology

    Comments
    provided by eFloras
    Parietaria judaica , which, in North America, is most abundant in scattered localities in California, is the only long-lived perennial species of Parietaria in the flora. Because of confusion in Europe over the correct name, plants in North America have been called P . judaica , P . officinalis of authors, not Linnaeus, P . officinalis var. erecta (Mertens & Koch) Weddell, and P . officinalis var. diffusa (Mertens & Koch) Weddell. For a clarification of the nomenclature and taxonomy of this complex, see C.C. Townsend (1968).

    Parietaria judaica was first reported from Louisiana as P . diffusa Mertens & Koch, another name commonly used on herbarium specimens (J.W. Thieret 1969).

    Description
    provided by eFloras
    Perennial, pubescent to glabrescent, 10-50 cm tall, basally woody herb. Leaves with 0.3-2 cm long, filiform, hairy petiole; lamina lanceolate-ovate or ovate-elliptic, 1-3(4) cm long, 0.5-2.0 (-2.5) cm broad, subtruncate to cuneate or rarely subcordate at the base, apex acute, appressed pubescent to glabrescent. Cymose flower clusters compact, few to many-flowered, subsessile to sessile, solitary, axillary. Flowers greenish, mostly bisexual, c. 3 mm across; bracts ovate-lanceolate or elliptic, 2.5-3 mm long, enlarged in fruit, subconnate at the base, obtuse. Calyx c. 3 mm long, lobes inflexed. Achenes ovoid, 1.5-2 mm long, brown, shining.
    Description
    provided by eFloras
    Herbs , perennial from crown, 1-8dm. Stems ascending, erect, or decumbent. Leaf blades narrowly to broadly elliptic, lance-elliptic, or ovate, 1.3-9 × 0.8-4.5 cm, base attenuate, cuneate, or broadly rounded, apex abruptly acuminate to long-attenuate. Flowers: involucral bracts 1.5-2.5 mm; tepals ca. 2-3.5 mm, longer than bracts. Achenes dark brown, symmetric, 1-1.2 × 0.6-0.9 mm, apex acute, mucro absent or minute; stipe centered, on cylindric base.
    Elevation Range
    provided by eFloras
    750 m

Habitat

    Habitat
    provided by eFloras
    Cracks in sidewalks, ballast heaps, waste places, frequently about ports and coastal areas; 0-200m.

Cyclicity

    Flower/Fruit
    provided by eFloras
    Fl.Per.: July-August.
    Flowering/Fruiting
    provided by eFloras
    Flowering all year, with peak in late winter-spring.