Bucklandiella sect. Marginatae

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

in R. Ochyra et al., Cens. Cat. Polish Mosses, 143. 2003,.

Basionym: Racomitrium sect. Marginata Bednarek-Ochyra Fragm. Florist. Geobot., Ser. Polon. 2: 175. 1995
Treatment appears in FNA Volume 27. Treatment on page 270. Mentioned on page 268, 271, 272.

Plants small, medium-sized to large, fairly slender to coarse, sometimes hoary. Stems prostrate, curved-ascending to erect, 1–15 cm, often copiously pinnately or intricately branched. Leaves lanceolate, straight to falcate, piliferous or muticous; hairpoint often long, strongly flexuose; margins usually recurved on both sides to 1/2–3/4 of the leaf length, rarely to the apex, 1–2-stratose; costa 2–3-stratose in the proximal part; laminal cells long-rectangular in the distal half, esinuose, porose and with strongly incrassate walls near the base; basal marginal border present, composed of transparent cells. Innermost perichaetial leaves strongly differentiated, hyaline proximally, chlorophyllose distally with areolation of cells with strongly incrassate walls, epilose or rarely piliferous.

Distribution

North America, Central America, South America, Eurasia, Africa, Atlantic Islands, Indian Ocean Islands, Pacific Islands, Australia, Antarctica

Discussion

Species ca. 10 (2 in the flora).

Section Marginatae is a sharply delimited taxon characterized primarily by strongly modified innermost perichaetial leaves that have the areolation in the distal half composed of cells with strongly incrassate walls. Additionally, the basal cells of vegetatvie leaves are esinuose with markedly incrassate lateral walls, the distal cells tend to be elongate, and the basal marginal border is present and is composed of pellucid, esinuose cells.

Selected References

None.

Key

1 Leaves often secund, not spirally arranged; basal marginal border composed of quadrate to short-rectangular cells, esinuose or very seldom sinuose; hair-point mostly present, 0.3-1.1 mm, capillaceous, flexuose, sharply denticulate. Bucklandiella microcarpa
1 Leaves straight, spirally twisted around the stem; basal marginal border composed of long-rectangular to linear cells; hair-point absent or short, to 0.4 mm, stout, straight, nodulose- denticulate. Bucklandiella afoninae

"/2-3/4" is not declared as a valid unit of measurement for this property.

sometimes +  and short-hyaline-tipped +
hyaline +  and yellowish hyaline +
papillose +
Ryszard Ochyra +  and Halina Bednarek-Ochyra +
(Bednarek-Ochyra) Bednarek-Ochyra & Ochyra in R. Ochyra et al. +
both +  and papillose +
toothed +
nodulose;oblate;quadrate;elongate +
thick-walled +  and nodulose-porose +
rectangular;linear +
divided +
Racomitrium sect. Marginata +
undifferentiated +
0 +  and 1/2 +
4-5-lobed +
small;large +
sulcate +  and smooth +
blackish brown +, castaneous +  and brown +
striate +  and smooth +
narrowed;obloid;narrowly cylindric +
transparent +
2-3-stratose +
subpercurrent +
papillose +  and smooth +
reniform +  and strongly flattened +
North America +, Central America +, South America +, Eurasia +, Africa +, Atlantic Islands +, Indian Ocean Islands +, Pacific Islands +, Australia +  and Antarctica +
sinuose-nodulose +
subquadrate +  and oblong +
often entirely hyaline +  and yellowish hyaline +
porose +  and esinuose +
pseudopapillose +
thick-walled +  and sinuose +
dioicous +  and sexual +
straight +
muticous +, piliferous +, falcate +  and lanceolate +
cristate +  and serrate +
extensive +
indistinct +
long-rostellate;conic-rostrate +
not +  and differentiated +
lanceolate;linear +
brown +  and reddish-brown +
2-fid +, lanceolate +  and triangular +
2 +  and 3 +
terete +  and filiform +
in R. Ochyra et al., Cens. Cat. Polish Mosses, +
arcuate +  and straight +
papillose +  and smooth +
short to long +
ornamented +  and smooth +
spheric +
creeping +  and decumbent +
curved-ascending +  and erect +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Dryptodon subg. Ellipticodryptodon +, Racomitrium sect. Ellipticodryptodon +, Racomitrium subg. Ellipticodryptodon +  and Racomitrium subg. Microcarpa +
Bucklandiella sect. Marginatae +
Bucklandiella +
section +
compact +  and loose +
flexuose +  and straight +
incrassate +
thin +  and thick +
jet-black;blackish brown;olive green;yellowish;brown;green +
slender;medium-sized;large +