Niphotrichum sect. Elongata

(Bednarek-Ochyra) Bednarek-Ochyra & Ochyra in R. Ochyra et al.

in R. Ochyra et al., Cens. Cat. Polish Mosses, 138. 2003,.

Basionym: Racomitrium sect. Elongata Bednarek-Ochyra Fragm. Florist. Geobot., Ser. Polon. 2: 94. 1995
Treatment appears in FNA Volume 27. Treatment on page 289. Mentioned on page 286.

Plants small, medium-sized to robust, green, olive or grayish green distally, brown. Leaves ovatelanceolate, lanceolate to triangular, sharply keeled to narrowly canaliculate in the distal part; costa in most leaves unbranched or only occasionally forked in some leaves, extending to three quarters of the leaf length to percurrent; leaf cell papillae tending to relatively small and inconspicuous in the distal lamina.

Distribution

North America, Europe, temperate Asia, Atlantic Islands

Discussion

Species 6 (4 in the flora).

Section Elongata is fairly homogeneous. Its members are readily recognized by their leaves, which are sharply keeled to narrowly canaliculate or canaliculate-keeled in the distal part, and their costae, which cease mostly at three quarters of the leaf length or are subpercurrent to percurrent and are generally undivided at the tip.

Selected References

None.

Key

1 Leaf margins recurved to 1/2-3/4 of the way up the leaf. Niphotrichum muticum
1 Leaf margins recurved to the apex > 2
2 Plants small; leaves 1.5-1.8 mm long; costa not grooved; laminal cells opaque, coarsely papillose, yellowish; alar cells forming a small and weakly inflated group; awns absent papillae or only faintly papillose at the base Niphotrichum pygmaeum
2 Plants medium-sized to large; leaves 2-3 mm long; costa lying in a shallow or deeper furrow; laminal cells coarsely to slightly papillose, mostly transparent, not yellowish (except the base); alar cells forming a conspicuous and distinctly inflated group; awns mostly coarsely papillose > 3
3 Supra-alar cells elongate, thin-walled and not sinuose, forming a transparent marginal border; awns erect-flexuose when dry, not or indistinctly decurrent, faintly papillose to epapillose in the distal part Niphotrichum ericoides
3 Supra-alar cells short, thick- and sinuose-walled, not forming a translucent border; awns recurved when dry, conspicuously decurrent, coarsely papillose throughout. Niphotrichum elongatum
decurrent +  and inflated +
Ryszard Ochyra +  and Halina Bednarek-Ochyra +
(Bednarek-Ochyra) Bednarek-Ochyra & Ochyra in R. Ochyra et al. +
capillaceous +
flexuose +  and straight +
epapillose +  and papillose +
denticulate +  and not decurrent +
nodulose;oblate;quadrate;elongate +
divided +
Racomitrium sect. Elongata +
2;3;2;numerous +
papillose +
linear-subulate +  and tuft-like +
undifferentiated +
naked +, plicate +  and smooth +
lobed +, lacerated +, mitrate-campanulate +, mitrate +  and cucullate +
small;large +
smooth to somewhat +  and sulcate +
obloid;cylindric +
thick-walled +, sinuose +, not sinuose +  and thin-walled +
yellowish +  and hyaline +
quadrate +  and rectangular +
enlarged +
3-stratose;2-stratose;branched;entire;percurrent +
subpercurrent +
North America +, Europe +, temperate Asia +  and Atlantic Islands +
thick-walled +  and sinuose +
lanceolate +  and triangular sharply keeled +
muticous +, acute +  and rounded-obtuse +
long-subulate +
piliferous;obtuse;acute +
cribrose +  and perforated +
lanceolate;linear +
in R. Ochyra et al., Cens. Cat. Polish Mosses, +
yellowish +  and blackish red +
sinistrorse +  and erect +
papillose +  and smooth +
short to long +
ornamented +  and smooth +
globose +
Niphotrichum sect. Elongata +
Niphotrichum +
section +
divided +
brown;grayish green;olive;green +
medium-sized;small +