Lysimachia × producta

Lysimachia × producta is a hybrid of flowering plants in the primrose family Primulaceae.[1] It is native to eastern North America, from Quebec south to North Carolina, as far west as Wisconsin.[2] The hybrid specific epithet producta means "stretched out, extended",[3] a reference to the shape of its inflorescence. Indeed, the hybrid is sometimes referred to as the elongated loosestrife.[4]

Lysimachia × producta
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Primulaceae
Genus: Lysimachia
Species:
L. × producta
Binomial name
Lysimachia × producta
Synonyms[1]
List
    • Lysimachia × foliosa Small
    • Lysimachia × polyantha Fernald
    • Lysimachia stricta var. producta A.Gray

Description

Lysimachia × producta has erect stems 4 to 10 dm (16 to 39 in) long. The leaves are whorled or opposite, each 4 to 8 cm (1.6 to 3.1 in) long and 1.5 to 2.5 cm (0.6 to 1.0 in) wide, with smooth surfaces. The inflorescence is a (sometimes leafy) terminal raceme, 20 to 35 cm (8 to 14 in) long. The pedicels are 1.5 to 3 cm (0.6 to 1.2 in) long. The flowers are 5-merous with yellow petals, streaked with reddish or reddish-black markings. The filaments are shorter than the petals.[5]

The parents of Lysimachia × producta are L. quadrifolia and L. terrestris. The flowers of the hybrid and its parents are very similar but overall L. × producta more closely resembles L. terrestris since both have terminal racemes. The two may be distinguished by the length of the raceme, the length of the pedicels, and whorled (as opposed to opposite) leaves.[5][6][7][8]

L. quadrifolia Lysimachia × producta L. terrestris
Leaves Whorled, (3-)4(-7) leaves per whorl, each 3 to 12 cm (1.2 to 4.7 in) long and 0.8 to 3.5 cm (0.3 to 1.4 in) wide, rarely to 4.5 cm (1.8 in) wide Whorled or opposite, each 4 to 8 cm (1.6 to 3.1 in) long and 1.5 to 2.5 cm (0.6 to 1.0 in) wide Usually opposite or subopposite (rarely alternate), each 3 to 10 cm (1.2 to 3.9 in) long and 0.5 to 2 cm (0.2 to 0.8 in) wide
Inflorescence Solitary flowers in leaf axils Terminal raceme, 20 to 35 cm (8 to 14 in) long Terminal raceme, 10 to 30 cm (4 to 12 in) long
Pedicels From 1.5 to 3 cm (0.6 to 1.2 in) long From 1.5 to 3 cm (0.6 to 1.2 in) long From 0.5 to 1.6 cm (0.2 to 0.6 in) long
Flowers 5-merous 5-merous 5-merous
Perianth Petals yellow, with reddish base Petals yellow, with reddish or reddish-black streaks Petals yellow, with dark streaks
Stamens Filaments fused, approximately 1.7 mm (0.07 in) long, shorter than the petals Filaments fused, from 1.7 to 3 mm (0.07 to 0.12 in) long, shorter than the petals Filaments fused, from 1 to 3.5 mm (0.04 to 0.14 in) long, shorter than the petals

References
  1. "Lysimachia × producta (A.Gray) Fernald". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 1 August 2021.
  2. "Lysimachia X producta". State-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 2 August 2021.
  3. Gledhill, David (2008). The Names of Plants (4th ed.). Cambridge University Press. p. 315. ISBN 978-0-521-86645-3.
  4. "Lysimachia quadrifolia × L. terrestris = L. ×producta". New York Flora Atlas. Retrieved 11 August 2021.
  5. Cholewa, Anita F. (2009). "Lysimachia ×producta". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 8. New York and Oxford: Oxford University Press. Retrieved 11 August 2021 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  6. Cholewa, Anita F. (2009). "Lysimachia quadrifolia". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 8. New York and Oxford: Oxford University Press. Retrieved 8 August 2021 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  7. Cholewa, Anita F. (2009). "Lysimachia terrestris". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 8. New York and Oxford: Oxford University Press. Retrieved 8 August 2021 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  8. Ray, Jr., James Davis (1956). The genus Lysimachia in the New World. Illinois Biological Monographs: Volume XXIV, Nos. 3-4. Urbana: The University of Illinois Press. pp. 74–77. Retrieved 26 July 2021.
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