Difference between revisions of "Thalictrum dioicum"

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|genus=Thalictrum
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|common_name=Early meadow rue
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|name_ref=Flora - A Gardener's Encyclopedia
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'''''Thalictrum dioicum''''' ('''Early meadow-rue''' or '''Quicksilver-weed''') is a species of herbaceous plants in the family [[Ranunculaceae]].  Plants are typically upright growing [[woodland]] natives from central and eastern North America including parts of south eastern Canada.  This species has dioecious plants, with male and female flowers on separate plants blooming in early to mid spring.
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''Thalictrum dioicum'' grows from 30 to 80 cm tall, from upright [[caudex]], with yellow-gold colored - thick fibrous roots.  New caudexes are generated each year by the current years plant and the old caudex withers away in the fall and early spring of the next year. In early spring plants grow, producing glabrous or glandular leaves. both basal and cauline leaves are produced that have long petioles. Leaf blades are 1-4×-ternately compound with leaflets reniform or cordate to obovate or orbiculate in shape. The leaflets are 10-45 mm wide with lobed margins often crenate, and the undersides are normally glabrous or glandular. [[Inflorescence]]s are [[panicle]]s or [[corymb]]s produced terminally and axillary with many flowered branches. The flowers have no petals but have greenish colored, 1.8-4mm long sepals sometimes tinted purple. The sepals are ovate to obovate or oval in shape. On male plants, the flower filaments are the most showy part of the hanging flowers, being yellow to greenish yellow in color and 3.5-5.5 mm long. The filaments end in anthers 2-4 mm long that are [[mucronate]] to [[acuminate]] in shape with purple colored stigma. After blooming, female plants if fertilized, produce green fruits called [[achene]]s. Each flower that is fertilized, typically produces (3-)7 to 13 achenes that are not reflexed and sessile or nearly so in tight clusters. The achenes are ovoid to ellipsoid in shape and not laterally compressed, 3.5-5 mm long, glabrous, very strongly veined, with 1.5 to 3mm long beaks, ripening in mid summer.<ref>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233501266 Thalictrum dioicum in Flora of North America @ efloras.org<!-- Bot generated title -->]</ref>
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Plants are grown in shade gardens for their attractive lacy foliage that is reminiscent of columbines or maiden hair fern. The males produce more showy flowers than the female plants, blooming in early spring with the flowers and foliage rising out of the ground in club-like clusters with the basel leaves unfolding first. Plants start to flower before the compound leaves have completely unfolded, plants are wind ''pollinate''d and males start off the year taller than the females, but as the fruits grow females are taller typically in summer.
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Thalictrum dioicum, Linn. Rather slender, 1-2 ft. high, glabrous: lvs. 3-4 times 3-parted; lfts. thin, orbicular, several-lobed or revolute, bases variable: fls. in a loose, leafy panicle with slender pedicels, dioecious; stamens much longer than the greenish sepals; anthers linear, obtuse, exceeding their filaments in length: achenes ovoid, nearly or quite sessile, longer than their styles, with about 10 longitudinal grooves. Early spring. Woods, Lab. to Ala., west to Mo.
 
Thalictrum dioicum, Linn. Rather slender, 1-2 ft. high, glabrous: lvs. 3-4 times 3-parted; lfts. thin, orbicular, several-lobed or revolute, bases variable: fls. in a loose, leafy panicle with slender pedicels, dioecious; stamens much longer than the greenish sepals; anthers linear, obtuse, exceeding their filaments in length: achenes ovoid, nearly or quite sessile, longer than their styles, with about 10 longitudinal grooves. Early spring. Woods, Lab. to Ala., west to Mo.
 
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Latest revision as of 21:54, 22 April 2010


Thalictrum dioicum.jpg


Plant Characteristics
Habit   herbaceous

Height: ⇕ 12 in"in" can not be assigned to a declared number type with value 12. to 30 in"in" can not be assigned to a declared number type with value 30.
Width: ⇔ 12 in"in" can not be assigned to a declared number type with value 12. to 16 in"in" can not be assigned to a declared number type with value 16.
Lifespan: ⌛ perennial
Bloom: ❀ early summer, mid summer, late summer
Cultivation
Exposure: ☼ part-sun, shade
USDA Zones: 4 to 9
Flower features: ❀ red, pink
Scientific Names

Ranunculaceae >

Thalictrum >

dioicum >

L. >


Thalictrum dioicum (Early meadow-rue or Quicksilver-weed) is a species of herbaceous plants in the family Ranunculaceae. Plants are typically upright growing woodland natives from central and eastern North America including parts of south eastern Canada. This species has dioecious plants, with male and female flowers on separate plants blooming in early to mid spring.

Thalictrum dioicum grows from 30 to 80 cm tall, from upright caudex, with yellow-gold colored - thick fibrous roots. New caudexes are generated each year by the current years plant and the old caudex withers away in the fall and early spring of the next year. In early spring plants grow, producing glabrous or glandular leaves. both basal and cauline leaves are produced that have long petioles. Leaf blades are 1-4×-ternately compound with leaflets reniform or cordate to obovate or orbiculate in shape. The leaflets are 10-45 mm wide with lobed margins often crenate, and the undersides are normally glabrous or glandular. Inflorescences are panicles or corymbs produced terminally and axillary with many flowered branches. The flowers have no petals but have greenish colored, 1.8-4mm long sepals sometimes tinted purple. The sepals are ovate to obovate or oval in shape. On male plants, the flower filaments are the most showy part of the hanging flowers, being yellow to greenish yellow in color and 3.5-5.5 mm long. The filaments end in anthers 2-4 mm long that are mucronate to acuminate in shape with purple colored stigma. After blooming, female plants if fertilized, produce green fruits called achenes. Each flower that is fertilized, typically produces (3-)7 to 13 achenes that are not reflexed and sessile or nearly so in tight clusters. The achenes are ovoid to ellipsoid in shape and not laterally compressed, 3.5-5 mm long, glabrous, very strongly veined, with 1.5 to 3mm long beaks, ripening in mid summer.[1]

Plants are grown in shade gardens for their attractive lacy foliage that is reminiscent of columbines or maiden hair fern. The males produce more showy flowers than the female plants, blooming in early spring with the flowers and foliage rising out of the ground in club-like clusters with the basel leaves unfolding first. Plants start to flower before the compound leaves have completely unfolded, plants are wind pollinated and males start off the year taller than the females, but as the fruits grow females are taller typically in summer.


Read about Thalictrum dioicum in the Standard Cyclopedia of Horticulture 

Thalictrum dioicum, Linn. Rather slender, 1-2 ft. high, glabrous: lvs. 3-4 times 3-parted; lfts. thin, orbicular, several-lobed or revolute, bases variable: fls. in a loose, leafy panicle with slender pedicels, dioecious; stamens much longer than the greenish sepals; anthers linear, obtuse, exceeding their filaments in length: achenes ovoid, nearly or quite sessile, longer than their styles, with about 10 longitudinal grooves. Early spring. Woods, Lab. to Ala., west to Mo. CH


The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.


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Pests and diseases

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Species

Gallery

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References

External links


  1. ↑ Thalictrum dioicum in Flora of North America @ efloras.org
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