Philonotis fontana |
Philonotis seriata |
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philonotis moss, spring moss |
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Habit | Plants small to large, in tufts, mats, or sods, light to dark green or yellowish, sometimes reddish or glaucous, reddish brown proximally. | Plants large, in dense tufts, green to yellowish throughout. | ||||||||
Stems | 1–16(–20) cm, erect, simple, irregularly branched, or with a subfloral whorl of innovations, tomentose proximally. |
3–12 cm, erect, simple, tomentose proximally. |
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Leaves | with distalmost rarely spiraled around stem, stiffly erect to erect or erect-spreading, less commonly catenulate, erect to erect-spreading when dry, erect to spreading or occasionally secund when moist, lanceolate to broadly ovate-lanceolate or ovate-subulate, 0.6–3 mm; margins revolute, serrulate throughout, teeth paired, appearing 2-fid due to their apposing position from contiguous cells, sometimes margins plane, teeth unpaired; apex gradually to abruptly acute to acuminate, sometimes obtuse; costa short- to long-excurrent (often subpercurrent in obtuse leaves), 320 µm wide at base, distal abaxial surface smooth or weakly prorulose; laminal cells prorulose at proximal ends on abaxial side and at proximal and distal ends on adaxial side; basal cells rectangular to oblong-hexagonal, 15–30 × 5–8 µm; juxtacostal cells at widest part of leaf 24–40 µm; distal cells linear to oblong-linear, 15–40 × 3–5 µm. Specialized asexual reproduction absent. |
seriate in 5 spiraled rows, erect to erect-spreading and imbricate when dry, erect-spreading when moist, ovate-lanceolate, 1.5–2 mm; margins plane or narrowly revolute, serrulate to denticulate nearly to base, teeth paired or single; apex evenly tapering; costa percurrent to excurrent, entire abaxial surface coarsely prorulose; laminal cells prorulose at proximal ends, usually on adaxial side; basal cells rectangular to elongate-hexagonal, 15–30 × 7–10 µm; distal cells narrowly oblong to linear, 25–45 × 4–6 µm. Specialized asexual reproduction absent. |
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Seta | 2–5(–7) cm, straight. |
3–5(–7) cm, straight. |
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Sexual condition | dioicous; perigonia discoid. |
dioicous; perigonia discoid. |
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Capsule | 1–3.5 mm. |
2–3 mm. |
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Spores | ovoid to reniform, 18–30 µm. |
subreniform, 20–22 µm. |
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Philonotis fontana |
Philonotis seriata |
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Phenology | Capsules mature Jun–Sep. | |||||||||
Habitat | Acid seeps and springs, high mountains | |||||||||
Elevation | low to high elevations (10-3000 m) (low to high elevations (0-9800 ft)) | |||||||||
Distribution | North America; Mexico; Europe; Asia; Africa; Atlantic Islands (Iceland)
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Greenland; Europe; Asia (India, Iran, e, n, w Russia); n Africa |
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Discussion | Varieties ca. 40 (3 in the flora). Philonotis fontana has a Holarctic distribution with limited penetration into the montane tropics of both Eastern and Western Hemispheres. The leaves are plane, 2- or pluriplicate, sometimes falcate or falcate-secund. Even given its membership in seepage communities, where morphological plasticity is not uncommon, the extent of variation in this species is excessive. Many variants have been recognized but with little firm evidence to support the majority of them. E. Nyholm (1954–1969) was convinced that only through a series of cultivation, cytological and genetic studies could the immense variability within this polymorphic complex be properly evaluated. W. M. Zales (1973) was able to show by a comparison of cultured and field-derived plants which of the morphological characters were relatively stable and which were subject to environmental influence. His treatment of this complex, with minor deviation, is followed here. The core characters for the species complex are laminal cells prorulose at proximal ends on the abaxial side, juxtacostal cells near the leaf base 24–40 µm, teeth of the leaf margin typically paired and appearing 2-fid, and costa 320 µm wide at the leaf base. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Philonotis seriata is mostly an Old World species that enters the flora area only in southern Greenland. The species is allied with P. fontana, including having obtuse inner perigonial leaves, but differs in the seriate stem leaves and the costa that is scabrous abaxially throughout. According to S. Flowers (1935), P. seriata does not occur on the North American continent. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 28, p. 111. | FNA vol. 28, p. 111. | ||||||||
Parent taxa | Bartramiaceae > Philonotis | Bartramiaceae > Philonotis | ||||||||
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Subordinate taxa | ||||||||||
Synonyms | Mnium fontanum | P. fontana var. seriata | ||||||||
Name authority | (Hedwig) Bridel: Bryol. Univ. 2: 18. (1827) | Mitten: J. Proc. Linn. Soc., Bot., suppl. 1: 63. (1859) | ||||||||
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