Weed
spiny cocklebur, Bathurst burrBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.
, cocklebur
BurrBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.
OvalOval:
Broadly elliptic.
with hooked spines (not shown)
Brown
Covered with hooked spines (not shown)
Outer covering consists of involucreInvolucre:
A number of bracts (often leaf-like) that subtend an inflorescence such as the head in sunflowers.
bracts.
Seed unitSeed unit:
The structure usually regarded as a seed in planting practices and in commercial channels, consisting of a true seed with or without accessory structures, as defined in Section 2.6 of the AOSA Rules. See also true seed.
(burrBurr:
Has spikelets or flowers that are compressed closely together by lacking a central axis. The spikelet glumes are hard and pointed, e.g. buffalograss.) is a fused involucreInvolucre:
A number of bracts (often leaf-like) that subtend an inflorescence such as the head in sunflowers. which typically contains two achenesAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
. The surface of the involucreInvolucre:
A number of bracts (often leaf-like) that subtend an inflorescence such as the head in sunflowers. is covered with hooked spines, which are broken off if the unit is subjected to rigorous conditioning.
State Noxious Weed: Alabama, Arkansas, Arizona, Florida, Georgia, Hawaii, Kansas, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas
Not included
For more information, see ISMA fact sheet.
Asteraceae
Xanthium spinosum L.
Acanthoxanthium spinosum (L.) Fourr.
Xanthium spinosum L. var. inerme Bel
