[1] : The Collaborative International Dictionary of English v.0.48

tumbleweed \tum"bleweed`\, n. bot.
   any plant which habitually breaks away from its roots in the
   autumn, and is driven by the wind, as a light, rolling mass,
   over the fields and prairies; such as witch grass, wild
   indigo, amarantus albus, etc.
   1913 webster
see also:
amarantus albus 

Amarantus >> A Words
Amarantus, definition of term: Amarantus
amarantus_pag1.html

Lupinus Albus >> L Words
Lupinus Albus, definition of term: Lupinus Albus
lupinus+albus_pag1.html