Yucca filamentosa.en.wikipedia.org (Accessed 11/2014).

Yucca filamentosa is a perennial evergreen monocotyledon herb in a leafy rosette from a short stem 30-40 cm long (often none in younger plants), apparently colonial from root sprouts. 

Leaves spatulate-linear, stiff, erect to 80 cm long, veins fine, parallel. 

Flowers dull white, radially symmetrical, petals 5-7 cm long, 2-3 cm wide; inflorescence large, branched, erect 1-3 m tall. 

Fruit dry, thick, cylindrical, 2-4 cm; plant blooms once and dies. 

Wetland status: NL. 

Frequency in NYC: Infrequent. 

Origin: Native to MD & south 

Habitat: Old house sites or planted.