P. annua Whole plant

P. annua Bloom

P. annua Bloom detail

P. annua Ligule/sheath

P. arachnifera Pistillate inflorescence

P. arachnifera Pistillate inflorescence

P. arachnifera Pistillate inflorescence

P. arachnifera Pistillate inflorescence

P. arachnifera Pistillate inflorescence

P. arachnifera Pistillate Spikelet detail

P. arachnifera Ligule/sheath