Stylisma patens

Stylisma patens
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Convolvulaceae
Genus: Stylisma
Species:
S. patens
Binomial name
Stylisma patens
(Desr.) Myint[1]

Stylisma patens, commonly referred to as coastal dawnflower or common dawnflower, is a member of the Convolvulaceae family found in North America.[2] There are two known varieties: Stylisma patens var. patens and Stylisma patens var. angustifolia (Nash) Shinners.[3]

Description

Stylisma patens is a perennial prostrate vine, with stems that may reach up to 6 ft (1.8 m) in length.[4] Stems may be either hairy or glabrous. The leaf blades are elliptic to lanceolate in shape. The two varieties have differing leaf dimensions; S. patens var. patens possesses blades 3 to 4 cm (1.2 to 1.6 in) long and 6 to 8 mm (0.24 to 0.31 in) wide, while S. patens var. angustifolia possesses blades 2 to 3 cm (0.8 to 1.2 in) long and 2 to 3 mm (0.08 to 0.12 in) wide.[5]

Inflorescence is 2 to 5 flowered with scale-like bracteoles.[3] The sepals are ovate-lanceolate in shape, approximately 6 to 9 mm (0.24 to 0.35 in) long and 3 to 5 mm (0.12 to 0.20 in) wide. The corolla is white.[5] Blooms occur from springtime into the fall.[4]

Distribution and habitat

Within North America, S. patens can be found in the southeast region of the United States. Its native range encompasses the states of North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, and Louisiana.[6]

S. patens occurs in relatively dry, sandy habitats such as longleaf pine sandhills, and the xeric and subxeric sandhill communities of north Florida.[7][8]

References

  1. ^ Myint, Tin (1966). "Revision of the genus Stylisma (Convolvulaceae)". Brittonia. 18 (2): 97–117 [110]. doi:10.2307/2805192.
  2. ^ Weakley, Alan S. (21 May 2015). Flora of the Southern and Mid-Atlantic States. University of North Carolina at Chapel Hill.
  3. ^ a b "Stylisma patens in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2025-10-21.
  4. ^ a b "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org. Retrieved 2025-10-21.
  5. ^ a b Allen, Charles M. "Stylisma patens". Flora of North America. Retrieved 2025-10-22.
  6. ^ "USDA Plants Database". plants.usda.gov. Retrieved 2025-10-21.
  7. ^ "Stylisma patens (Common Dawnflower) - FSUS". fsus.ncbg.unc.edu. Retrieved 2025-10-21.
  8. ^ Carr, Susan C.; Robertson, Kevin M.; Peet, Robert K. (June 2010). "A Vegetation Classification of Fire-Dependent Pinelands of Florida". Castanea. 75 (2): 153–189. doi:10.2179/09-016.1. ISSN 0008-7475.