Polystichum lonchitis |
Polystichum microchlamys |
|
---|---|---|
holly fern, mountain fern, northern holly fern, polystic faux-lonchitis |
attu hollyfern |
|
Stems | erect to occasionally ascending. |
erect. |
Leaves | erect, not arching except at tip, 1–6 dm; bulblets absent. |
arching, 3–8 dm; bulblets absent. |
Petiole | 1/10–1/6 of blade, densely scaly; scales light brown, gradually diminishing in size distally. |
1/8–1/4 length of leaf, densely scaly; scales brown, diminishing in size distally. |
Blade | linear, often widest above middle, 1-pinnate, base narrowed. |
broadly lanceolate, 1-pinnate-pinnatifid, base slightly narrowed. |
Pinnae | oblong to lanceolate to falcate, proximal pinnae ± deltate, rarely overlapping, in 1 plane, 0.5–3 cm, base truncate to oblique, acroscopic auricle well developed; margins serrulate-spiny with teeth spreading; apex acute, subapical tooth hardly smaller than apical tooth; microscales dense, on abaxial surface only. |
narrowly lanceolate, not overlapping, in 1 plane, 3–13 cm; base oblique, proximal acroscopic segments enlarged; margins incised to costa but segments sessile and adnate to costa for at least 2 mm, segments excised and decurrent, serrulate-spiny with teeth spreading to ascending; apex acute with subapical and apical teeth same size; microscales filiform, dense abaxially, sparse adaxially. |
Indusia | entire or minutely dentate-erose. |
erose-dentate. |
Spore(s) | dark brown. |
color unknown. |
2n | = 82. |
|
Polystichum lonchitis |
Polystichum microchlamys |
|
Habitat | In rock crevices or at base of boulders, mostly in boreal and subalpine coniferous forests or alpine regions | Terrestrial |
Elevation | 0–3200 m (0–10500 ft) | 0–100 m (0–300 ft) |
Distribution |
AK; AZ; CA; CO; ID; MI; MN; MT; NV; OR; UT; WA; WI; WY; AB; BC; NF; NS; ON; QC; YT; Greenland
|
AK; Asia in Kamtchatka and Japan |
Discussion | The hybrid between Polystichum lonchitis and P. acrostichoides (= P. × hagenahii Cody) is discussed under P. acrostichoides. The hybrid with P. braunii (= P. × meyeri Sleep & Reichstein) is discussed under P. braunii. In the Georgian Bay area of Ontario, P. lonchitis hybridizes with Dryopteris goldieana to produce the peculiar × Dryostichum singulare W. H. Wagner (W. H. Wagner Jr., F. S. Wagner et al. 1992). The spiny spores of P. lonchitis are distinctive and distinguish this from dwarfed forms of other 1-pinnate species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Polystichum microchlamys is found in the flora only on Attu, at the western tip of the Aleutian Archipelago. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Dryopteridaceae > Polystichum | Dryopteridaceae > Polystichum |
Sibling taxa | ||
Synonyms | Polypodium lonchitis | Aspidium microchlamys |
Name authority | (Linnaeus) Roth: Tent. Fl. Germ. 3(1): 71. (1799) | (H. Christ) Matsumura: Index Pl. Jap. 1: 343. (1904) |
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