buttonweed

English

Etymology

button +‎ weed

Noun

buttonweed (plural buttonweeds)

1. Any of numerous species of plants with button-like flowers, especially:
   1. Any of several plants of the genera Diodia and Diodella, of the madder family.
   2. False buttonweed (Spermacoce spp.).
   3. Velvetleaf, Indian mallow (Abutilon theophrasti).
   4. Certain knapweeds (Centaurea spp.).
   5. Clustered bluet (Oldenlandia uniflora).
   6. Dwarf mallow, common mallow (Malva neglecta).
   7. Water buttons (Cotula spp.).

Derived terms

• annual buttonweed (Cotula australia)
• false buttonweed (Spermacoce spp.)
• feathery buttonweed (Leptinella scariosa)
• Iridescent buttonweed (Erythrymenia minuta)
• rough buttonweed (Hexasepalum teres, Diodia redula, Diodia teres)
• seaside buttonweed (Diodia serrulata)
• stiff buttonweed (Diodia apiculata)
• slender buttonweed (Diodia ocymifolia)
• tropical buttonweed (Diodia sarmentosa)
• Virginia buttonweed (Diodia virginiana)

References

• Diodia on Wikipedia.Wikipedia
• List_of_Rubiaceae_genera on Wikipedia.Wikipedia
• Spermacoce on Wikipedia.Wikipedia
• Abutilon theophrasti on Wikipedia.Wikipedia

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “buttonweed”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)