Botrychium angustisegmentum (Pease & Moore) Fern. -  Narrow Triangle Moonwort


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Botrychium angustisegmentum - (image 1 of 3)



Family: Ophioglossaceae


Moist shaded woods and margins of swamps.




Newfoundland to Ontario and WI, south to VA, WV, and OH.


Trophophore dark green, membranous; lobes of the pinnae 1-2.5 mm wide, distant, narrow at the base and acute at the apex; sporophotes 1-3-pinnate, 1-2.5 times the length of the trophophore, devided into several equally long branches.


Spores produced late summer to October

Wetland category: NA

Has in the past been treated as a variety of the more northern B. lanceolatum which does not occur in the northeastern U.S. The multiple-stalked sporophore is unique to these two Botrychium spp. with most others bearing a single stalk or a dominant stalk with two smaller ones.


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY


Wagner, W.H, Jr. and Wagner, F.S. 1993. Botrychium. In: Flora of North America North of
Mexico, Vol. 2. Oxford University Press, New York and Oxford.




Michael Hough 2018