asteraceae

barb

botany

branch

brown

burweed

cocklebur

compositae

defense

dry

ecology

environment

fall

features

forest

forestry

grass

herb

medical

medicinalherbs

nature

needle

outdoor

plant

pointed

poisonous

prickle

prickly

rural

season

seasonal

seasons

seedpod

sharp

species

spike

spiny

stem

sticky

strumarium

thistle

thorn

thorny

treatment

village

weed

white

wildflower

wildlife