Oldenlandia corymbosa

From Coastal Plain Plants Wiki
Jump to: navigation, search
Oldenlandia corymbosa
Olde cory.jpg
Photo by John R. Gwaltney, Southeastern Flora.com
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida – Dicotyledons
Order: Rubiales
Family: Rubiaceae
Genus: Oldenlandia
Species: O. corymbosa
Binomial name
Oldenlandia corymbosa
Olde cory dist.jpg
Natural range of Oldenlandia corymbosa from USDA NRCS Plants Database.

Common names: Flat-top mille graines; Diamond-flower[1]

Taxonomic notes

Synonyms: Hedyotis corymbosa (Linnaeus) Lamarck.[1]

Varieties: none.[1]


"Diffuse annuals or perennials with opposite, sessile or subsessile leaves connected by fimbriate stipules. Flowers axillary or in few-flowered cymes; calyx lobes 4; corolla white, rotate, minute, shorter than the calyx; stamens 4. Capsule enclosed in the calyx, the apex splitting to release the numerous, minute seeds."[2]

"Slender, branched, spreading, glabrous annual with erect or decumbent stems 2-5 dm long. Leaves elliptic to linear-elliptic, the largest 1.5-2.5 cm long, 4-7 mm wide. Flower axillary, peduncles filiform, 5-10 mm long, pedicels filiform, 3-5 mm long; calyx glabrous, 1-1.5 mm long, lobes minute, subulate. Seeds brown, angled, ca. 0.2 mm long or broad."[2]


This plant is a native of South America, but has been reported in North Carolina.[1]



Oldenlandia corymbosa has been found growing on exposed sandbars in rivers, sidewalk gravel, cracks of concrete, and loamy sand of an open planted peanut field.[3] Soil types include loamy sand, sandy loam, sandy alluvium, and clayey sand.[3]


This plant flowers from July through October.[1][4]


The following Hymenoptera families and species were observed visiting flowers of Oldenlandia corymbosa at Archbold Biological Station:[5]

Halictidae: Lasioglossum lepidii, L. placidensis, L. puteulanum

Sphecidae: Cerceris blakei, C. tolteca

Conservation, cultivation, and restoration

Cultural use

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
  2. 2.0 2.1 Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 981. Print.
  3. 3.0 3.1 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: October 2015. Collectors: Loran C. Anderson, R.K. Godfrey, Sidney McDaniel, Annie Schmidt. States and Counties: Florida: Calhoun, Franklin, Gadsden, Gulf, Jackson, Lafayette, Leon, Liberty, Suwannee. Countries: Costa Rica, Panama. Compiled by Tall Timbers Research Station and Land Conservancy.
  4. Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 19 MAY 2021
  5. Deyrup, M.A. and N.D. 2015. Database of observations of Hymenoptera visitations to flowers of plants on Archbold Biological Station, Florida, USA.