
© Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern Unite… · Public domain
Wikimedia Commons — CC, credited & licensed per image

Rubiaceae family
Clustered Mille Graines Oldenlandia uniflora
Native
Late-season nectar — Flowers in a late-autumn window when few other plants in our catalog bloom — valuable late forage for pollinators (relative to our catalog's bloom coverage).
Clustered Mille Graines is an annual shrub native to the lower 48 states and Puerto Rico. It blooms Aug – Nov.
Growing & care
USDA PLANTS · TRY Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
- Hardiness
- ≥ zone 7 derived from its U.S. range
Size & form
Sources · Size & form
USDA PLANTS — Lifespan
- Lifespan
- Annual
In the garden
Shrub layer — Sits in the shrub of a layered food forest or polyculture.Open guide →
Rain garden / bioswale — Rated FACW on the wetland list — tolerates wet feet, so it suits the soggy zone of a rain garden or bioswale that catches and filters runoff.Open guide →
derived roles The garden year bloom → fruit → fall colour
J
F
M
A
M
J
J
A
S
O
N
D
Bloom
Bloom (the flower's colour)
Bloom · Aug – Nov — 39 obs · Herbarium specimens — Park et al. 2023 (CC BY 4.0)
Species characteristics from USDA PLANTS (public domain) + TRY (CC BY) — general guidance, not a
guarantee for your exact site. Deer "browsing" is documented palatability, not a deer-proof claim.
Frequently grows with
Across 55 U.S. vegetation-survey plots that recorded Clustered Mille Graines, these catalog species turned up most often in the same plot — a real field co-occurrence signal, not a planting prescription.
Broomsedge Bluestem · 71% Inkberry · 71% Slender Goldentop · 65% Beyrich Threeawn · 56% Bushy Bluestem · 55% Longleaf Pine · 53% Saw Palmetto · 53% Dwarf Huckleberry · 45%
"%" = share of this plant's plots that also held the species. From
sPlotOpen → (Sabatini et al. 2021, CC BY 4.0) — open vegetation plots: wild community composition, not garden design.
Sources for this entry (12) Open & cited
[01] Scientific name & family — USDA PLANTS (DwCA, Zenodo 17903503)
[02] Growth habit & duration — USDA PLANTS (DwCA, Zenodo 17903503)
[03] Native status & distribution — USDA PLANTS (DwCA, Zenodo 17903503)
[04] Common name — USDA PLANTS (via GBIF)
[05] Invasive / introduced status — USDA PLANTS (DwCA, Zenodo 17903503) — native status
[06] Wetland indicator — USACE National Wetland Plant List (2022)
[07] Photos — Wikimedia Commons — CC, credited per image
[08] Ecological value — GloBI
[09] Bloom period — Herbarium specimens — Park et al. 2023 (CC BY 4.0)
[10] Conservation rank — NatureServe Explorer (CC BY)
[11] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[12] Grows with — sPlotOpen — Sabatini et al. 2021 (iDiv, CC BY 4.0)
Spot an error or have a better photo? Every field links to its source, and the whole dataset is open.
Cite this page Open data, please attribute
PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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