Hilduin (or Hildwin, Hilduinus, etc.) may refer to:
- Hilduin (bishop of Verdun) (died 847)
- Hilduin (archbishop of Cologne) (died 849)
- Hilduin of Saint-Denis (died 855/9), abbot, archchaplain and bishop
- Hilduin of Saint-Martin (died 860), abbot
- Hilduin of Saint-Germain-des-Prés (fl. 854–867), abbot, archchaplain and bishop
- Hilduin (bishop of Évreux) (died 870)
- Hilduin of Saint-Bertin (died 877), abbot
- Hilduin (archbishop of Milan) (died 936), also bishop of Liège and Verona
- Hilduin I, Count of Montdidier (died before 956)
- Hilduin II, Count of Arcis-sur-Aube (died after 993)
- Hilduin (bishop of Limoges) (r. 990–1012)
- Hilduin III, Count of Montdidier (died after 1032)
- Hilduin of Joinville (died 1055), lord of Nully
- Hilduin IV, Count of Montdidier (died 1063)
- Hilduin of Vendeuvre (died 1203), bishop of Langres
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