Botrychium ascendens |
Botrychium oneidense |
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trianglelobe moonwort, upswept moonwort |
blunt-lobe grape-fern, blunt-lobed grapefern, botryche d'oneida, botryche du lac onéida |
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Pinnae | to 5 pairs, strongly ascending, well separated, 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 narrowly cuneate, undivided to tip, margins sharply denticulate and often shallowly incised, apex rounded, venation like ribs of fan, midrib absent. |
to 5 pairs, usually remote, horizontal to ascending, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, undivided except in proximal 2/3–3/4. |
Trophophore | stalk 3–10 mm, 1/6 length of trophophore rachis; blade yellow-green, oblong to oblong-lanceolate, 1-pinnate, to 6 × 1.5 cm, thin but firm. |
stalk 2–15 cm, 1.5–2.5 times length of blade rachis; blade dull bluish green, ± plane, 2–3-pinnate, to 15 × 20 cm, ± leathery. |
Sporophores | 2-pinnate at base of sporangial cluster, 1.3–2 times length of trophophore. |
2–3-pinnate, 1.5–2.5 times length of trophophore. |
Pinnules | obliquely ovate, margins finely crenulate to denticulate, apex rounded to acute, venation pinnate. |
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2n | =180. |
=90. |
Botrychium ascendens |
Botrychium oneidense |
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Phenology | Leaves appearing in late spring to midsummer. | Leaves green over winter, sporophores seasonal, new leaves appearing in spring. |
Habitat | In grassy fields, widely scattered | In moist, shady, acidic woods and swamps |
Elevation | 0–2500 m (0–8200 ft) | 0–1200 m (0–3900 ft) |
Distribution |
AK; CA; MT; NV; OR; WY; BC; ON; YT
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CT; DC; DE; IN; KY; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; PA; RI; VA; VT; WI; WV; NB; ON; QC
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Discussion | Botrychium ascendens is a distinctive little moonwort that grows with B. crenulatum, B. lunaria, and B. minganense. This species and B. pedunculosum are the only grapeferns that often have extra sporangia on the proximal pinnae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Botrychium oneidense commonly occurs with B. dissectum and B. multifidum. Young individuals of both may resemble B. oneidense (W.H. Wagner Jr. 1961b). (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. Sceptridium > sect. Sceptridium |
Sibling taxa | ||
Synonyms | B. ternatum var. oneidense, B. dissectum var. oneidense, B. multifidum var. oneidense | |
Name authority | W. H. Wagner: Amer. Fern J. 76: 36, figs. 1, 2. (1986) | (Gilbert) House: Amer. Midl. Naturalist 7: 126. (1905) |
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