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Published In: Hortus Kewensis; or, a catalogue . . . 2: 414. 1789. (Hort. Kew.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 8/18/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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1. Erodium cicutarium (L.) L’Hér. ex Aiton (filaree, alfilaria, pink needle, pin clover)

Pl. 422 a–d; Map 1881

Plants moderately to densely pubescent with more or less spreading, minutely gland-tipped hairs. Stems 2–35 cm long, sometimes beginning to produce flowers when very short, but elongating and somewhat mat-forming later in the season. Leaves short- to long-petiolate. Leaf blades 2–10 cm long, narrowly oblong-oblanceolate in outline, pinnately compound with 4–8 pairs of opposite leaflets, these 4–13 mm long, mostly ovate to oblong-elliptic in outline, deeply pinnately lobed, the lobes toothed or shallowly lobed along the margins. Sepals 2.5–4.0 mm long at flowering, persistent and becoming elongated to 6.5 mm at fruiting, lanceolate to oblong-ovate. Petals 3–6 mm long, obovate, narrowed to a stalklike base, pink to lilac, lavender or pale purple. Stamens with the filaments gradually broadened toward the base. Mericarps 25–45 mm long at maturity, the seed-containing basal portion 3.5–4.5 mm long, moderately to densely pubescent with short stiff ascending hairs, the stylar beak with inconspicuous short appressed hairs. Seeds 2–3 mm long. 2n=40 (2n=20, 36, 48, 54 in some European populations). March–November.

Introduced, uncommon and sporadic, mostly south of the Missouri River (native of Europe, Asia, Africa; widely introduced in most temperate regions of the world, including the U.S. [including Alaska, Hawaii], Canada, Greenland, Mexico, etc.). Glades, also lawns, roadsides, and open disturbed areas.

Filaree is a widespread but mostly innocuous weed, although in the southwestern United States, it can interfere with seedling establishment of crop plants in cultivated fields. The petals are shed the same day that the flower opens.

 


 

 
 
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