Bucklandiella macounii

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

in R. Ochyra et al., Cens. Cat. Polish Mosses 146. 2003,.

Basionym: Racomitrium brevipes Kindberg Bull. Torrey Bot. Club 16: 93. 1889
Synonyms: Racomitrium heterostichum var. macounii (Kindberg) G. N. Jones Racomitrium robustifolium
Treatment appears in FNA Volume 27. Treatment on page 282. Mentioned on page 269, 281, 285.

Plants medium-sized to moderately robust, rigid, in dense or loose tufts or patches, reddish green, reddish-brown, brown or olivaceous at the apices, reddish-brown to blackish proximally. Stems 3.5–6 (–13) cm, ascending to erect or prostrate, simple or sparsely branched. Leaves erect-appressed, straight to distinctly contorted when dry, erect-patent to spreading when moist, narrowly lanceolate, (1.5–) 2.2–3 (–3.2) × (0.3–) 0.5–0.8 mm; margins broadly or narrowly recurved to 1/2–2/3 of the leaf length on one side, plane or faintly recurved in the broadest part of the leaf on the other side, strongly thickened and bulging, 2 (–4) -stratose in (1–) 2–3 (–6) cell rows distally, 2-stratose in 1–3 (–4) cell rows in the median and upper basal parts and 1-stratose close the base; apices gradually tapering at an attenuate point, muticous or piliferous, awns short, to 0.2 mm, terete, reddish or yellowish hyaline, erect to recurved when dry, strongly spinulose, not decurrent; costa percurrent, robust, strongly convex abaxially and rounded to elliptical in outline, 60-100 (–150) µm wide basally, 40–70 µm wide near the apex, (3–) 4 (–5) -stratose with 3–6 larger adaxial cells in the basal part, 3–4-stratose with 3–5 (–6) adaxial cells in the middle and (2–) 3–4-stratose with 2–4 adaxial cells in the distal part; laminal cells 1-stratose with 2-stratose streaks, smooth or moderately papillose; basal laminal cells rectangular, 25–55 × 8–9 µm, with sinuose-nodulose, thick walls; alar cells undifferentiated; basal marginal cells absent or more or less distinct, composed of 15-40 short, transparent, not or moderately sinuose cells; medial and distal laminal cells irregularly isodiametric to short-rectangular or oblate near the margins, 5–25 × 8–9 µm. Inner perichaetial leaves ovatelanceolate, without or with a very short hairpoint, not or weakly differentiated. Seta brown, 4–7 mm. Capsule brown, slightly glistening, obloid-cylindric, 1–1.9 × 0.5–0.8 mm; operculum stout, convex-conical to shortly rostrate; peristome teeth lanceolate, 330–450 µm, reddish or orangebrown, densely spiculate papillose, variously split into 1–3 prongs, perforated or undivided, arising from a fairly short basal membrane, 35–50 µm high. Spores 12–14 µm.

Discussion

Subspecies 2 (2 in the flora).

Bucklandiella macounii is a prominent species that is diagnosed by its regularly 2-stratose or sometimes in places 3–4-stratose leaf margins in 2–4 or even as many as six cell rows forming bulging thickenings, very short, to 0.2 mm, stout, terete, strongly spinulose and recurved, subhyaline or hyaline awns, as well as very strong costae that are strongly convex, rounded to elliptical in outline on the abaxial side, 4-stratose in the basal and median parts, and plants typically reddish tinged. The species is most similar to the highly variable B. sudetica, especially to plants designated as forma kindbergii; the differences between these taxa are discussed under 12. B. sudetica.

Selected References

None.

Key

1 Plants usually dull and olivaceous; leaves contorted when dry; muticous or awns less than 0.1 mm long; distal laminal cells predominantly oblate and quadrate; costa 80-100(-150) µm wide basally Bucklandiella macounii subsp. macounii
1 Plants usually lustrous and reddish; leaves erect-imbricate, awns present, usually longer, to 0.2 mm; distal laminal cells predominantly quadrate to short-rectangular; costa 60-85 µm wide basally Bucklandiella macounii subsp. alpina
... more about "Bucklandiella macounii"
sometimes +  and short-hyaline-tipped +
hyaline +  and yellowish hyaline +
papillose +
Ryszard Ochyra +  and Halina Bednarek-Ochyra +
(Kindberg in Macoun) Bednarek-Ochyra & Ochyra in R. Ochyra et al. +
yellowish hyaline +  and reddish +
flexuose +
erect +  and recurved +
both +  and papillose +
not decurrent +  and terete +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
nodulose;oblate;quadrate;elongate +
thick-walled +  and nodulose-porose +
rectangular;linear +
divided +
Racomitrium brevipes +
undifferentiated +
0 +  and 1/2 +
4-5-lobed +
small;large +
sulcate +  and smooth +
0.1 cm1 mm <br />0.001 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
striate +  and smooth +
obloid-cylindric +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.08 cm0.8 mm <br />8.0e-4 m <br /> (?) +
transparent +
undifferentiated +
15 (?) +  and 40 (?) +
1 (?) +  and 3 (?) +
(2-)3-4-stratose;3-4-stratose;(3-)4(-5)-stratose;percurrent +
subpercurrent +
papillose +  and smooth +
rounded +  and elliptical +
40um +  and 70um +
North America +  and Eurasia +
sinuose-nodulose +
subquadrate +  and oblong +
papillose +  and smooth +
0.3 cm3 mm <br />0.003 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
thick-walled +  and sinuose +
dioicous +  and sexual +
straight +
2.2mm;3mm +
lanceolate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
2-stratose;2(-4)-stratose +
1/2 +  and 2/3 +
extensive +
indistinct +
convex-conical;shortly rostrate +
not +  and differentiated +
lanceolate;linear +
orangebrown +  and reddish +
papillose +  and spiculate +
attenuate +
1 +  and 3 +
terete +  and filiform +
in R. Ochyra et al., Cens. Cat. Polish Mosses +
arcuate +  and straight +
papillose +  and smooth +
short to long +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0 +  and 1/2-3/4 +
undivided +  and perforated +
ornamented +  and smooth +
spheric +
branched +  and simple +
creeping +  and decumbent +
1cm;13cm +
ascending +  and erect or prostrate +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Racomitrium heterostichum var. macounii +  and Racomitrium robustifolium +
Bucklandiella macounii +
Bucklandiella sect. Sudeticae +
species +
compact +  and loose +
flexuose +  and straight +
sinuose-nodulose +
reddish-brown;blackish +