Botrychium virginianum |
Botrychium lunaria |
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botryche de virginie, common grapefern, rattlesnake fern |
botryche lunaire, common moonwort, moonwort grapefern |
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Pinnae | to 12 pairs, usually approximate to overlapping, slightly ascending, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, lanceolate, divided to tip. |
to 9 pairs, spreading, mostly overlapping except in shaded forest forms, 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, broadly fan-shaped, undivided to tip, margins mainly entire or undulate, rarely dentate, apical lobe usually cuneate to spatulate, notched, approximate to adjacent lobes, apex rounded, venation like ribs of fan, midribs absent. |
Trophophore | sessile; blade pale green, 3–4-pinnate, to 25 × 33 cm, thin, herbaceous. |
stalk 0–1 mm; blade dark green, oblong, 1-pinnate, to 10 × 4 cm, thick, fleshy. |
Pinnules | lanceolate and deeply lobed, lobes linear, serrate, apex pointed, venation pinnate, midrib present. |
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Sporophores | 2-pinnate, 0.5–1.5(–2) times length of trophophore. |
1–2-pinnate, 0.8–2 times length of trophophore. |
2n | =184. |
=90. |
Botrychium virginianum |
Botrychium lunaria |
|
Phenology | Leaves seasonal, appearing in early spring and dying in late summer. | Leaves appearing in spring, dying in latter half of summer. |
Habitat | Common to abundant, especially in shaded forests and shrubby second growth, rare or absent in arid regions | Open fields, occasionally forests in southern occurrences |
Elevation | 0–1500 m (0–4900 ft) | 0–3700 m (0–12100 ft) |
Distribution |
AK; AL; AR; AZ; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; Mexico; Central America; South America in Brazil; Colombia; Ecuador; Peru; Eurasia |
AK; AZ; CA; CO; ID; MA; ME; MI; MN; MT; NH; NM; NV; NY; OR; PA; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; SPM; Pacific Islands in New Zealand; Greenland; Eurasia; s South America; Australia
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Discussion | Botrychium virginianum is the most widespread Botrychium in North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Botrychium lunaria grows with many other species of Botrychium, occasionally hybridizing with them. This species, geographically the most widespread of the moonworts, has notably uniform morphology. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Ophioglossaceae > Botrychium > subg. Osmundopteris | Ophioglossaceae > Botrychium > subg. Botrychium |
Sibling taxa | ||
Synonyms | Osmunda virginiana | Osmunda lunaria, B. onondagense |
Name authority | (Linnaeus) Swartz: J. Bot. (Schrader) 1800(2): 111. (1801) | (Linnaeus) Swartz: J. Bot. (Schrader) 1800(2): 110. (1801) |
Web links |
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