A Heerhaufen, also Haufen or Haufe, was the name given to unorganised or poorly organised paramilitary troops and auxiliaries in Central Europe during the Early Modern Period. The term is German and is sometimes translated "company" or "troops".
The term Haufe was used especially during the peasants' wars and Thirty Years' War for a body of men, sometimes of several thousand armed peasants or Landsknechten, often with as part of a grassroots democracy movement (c.f the Heeresversammlungs of antiquity), and therefore more loosely organised than the smaller and strictly military units known as Fähnleins.
The well known German Youth Movement song "Wir sind des Geyers schwarze Haufen" ("We are Geyer's black Haufen") recalls the notion of the Haufen.
The German name for a forlorn hope is Verlorener Haufen ("Lost Haufen").
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction