Botrychium paradoxum |
Botrychium pseudopinnatum |
|
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Paradox moonwort, peculiar moonwort, two-spike moonwort |
false daisyleaf moonwort, false northwestern moonwort |
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Pinnae | to 6 pairs, ascending, approximate to overlapping, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, basal pinna pair approximately equal in size and cutting to adjacent pair, obliquely ovate to lanceolate-oblong to spatulate, deeply and regularly lobed or pinnulate, lobed to tip, margins entire to very shallowly crenulate, apex truncate, venation pinnate. |
|
Sporophores | double, 2 per leaf, 1-pinnate, 0.5–4 cm. |
2-pinnate, 1–2 times length of trophophore. |
Trophophore(s) | converted entirely to second fertile segment, stalk 1/2 length of fertile segment. |
stalk 0–3 mm, 0 to 0.2 times length of trophophore rachis; blade dark green, somewhat shiny, oblong, 1–2-pinnate, to 4.5 × 2.5 cm, leathery. |
2n | =180. |
=270. |
Botrychium paradoxum |
Botrychium pseudopinnatum |
|
Phenology | Leaves appearing in late spring to early fall. | |
Habitat | Sporophores in June to August. Difficult to detect, plants usually hidden under other vegetation, in snowfields, secondary growth pastures | Sandy soil |
Elevation | 1500–3000 m (4900–9800 ft) | 300–500 m (1000–1600 ft) |
Distribution |
MT; UT; AB; BC; SK
|
ON |
Discussion | The leaf structure of Botrychium paradoxum is uniform and unique. Very rare teratological individuals of other moonwort species may have trophophores partially or wholly transformed into sporophores. Botrychium × watertonense W.H. Wagner, known only from one locality in western Alberta, is the sterile hybrid of B. hesperium and B. paradoxum. It can be identified by its trophophore pinnae; all are bordered with sporangia. It may reproduce by some unknown mechanism, such as unreduced spores (W.H. Wagner Jr., F. S. Wagner, et al. 1984). Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Botrychium pseudopinnatum is the only known hexaploid in Botrychium subg. Botrychium. It differs from B. pinnatum in smaller size, in narrower trophophore with relatively shorter and more oblique and ascending pinnae, in longer trophophore stalk, and in blade color, texture, and luster. Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Ophioglossaceae > Botrychium > subg. Botrychium | Ophioglossaceae > Botrychium > subg. Botrychium |
Sibling taxa | ||
Name authority | W. H. Wagner: Amer. Fern J. 71: 24. (1981) | W. H. Wagner: Contr. Univ. Michigan Herb. 17: 322. (1990) |
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