Aplodon

R. Brown

Chlor. Melvill., 41. 1823.

Etymology: Greek haplo- , single, and odon, tooth, alluding to single layer of peristome teeth
Synonyms: Haplodon R. Brown ex I. Hagen
Treatment appears in FNA Volume 28. Treatment on page 28. Mentioned on page 15, 650.
 TaxonIllustrator 
SplaAplodonWormskioldii.jpegAplodon wormskioldiiPatricia M. Eckel

Plants in slender lax tufts, light green distally. Stems 6 cm; rhizoids dense proximally. Stem-leaves broadly ovate or obovate; margins entire; apex obtuse to acute and abruptly short-acuminate; costa ending before apex; proximal laminal cells rounded-rectangular; distal cells oblong-hexagonal. Sexual condition autoicous. Seta 1–2 cm, twisted, flexuose. Capsule not cleistocarpous, reddish, black with age, shrunken and widest at mouth when dry, ovate when moist; hypophysis same color as urn, rounded, elongate, not or slightly wider than urn; annulus weakly differentiated; operculum hemispheric, sometimes apiculate; peristome single; exostome teeth 8–12, at first in pairs, then separate, erect or reflexed, rudimentary. Calyptra mitrate or cucullate, conic, not constricted beyond base. Spores 10–15 µm, smooth.

Distribution

n North America, n Eurasia, subarctic to Arctic regions

Discussion

Species 1.

Although plants of Aplodon have an inflated hypophysis, based upon the molecular data, placement of the genus is not well resolved within Splachnaceae, and its relationship to or within this family requires further study (B. Goffinet et. al. 2004).

Selected References

None.

"widest" is not a number.

... more about "Aplodon"
differentiated +
Paul C. Marino +
R. Brown +
conic +, cucullate +  and mitrate +
not constricted +
black;reddish +
not cleistocarpous +
shrunken +
autoicous +  and sexual +
oblong-hexagonal +
n North America +, n Eurasia +  and subarctic to Arctic regions +
Greek haplo- , single, and odon, tooth, alluding to single layer of peristome teeth +
reflexed +  and erect +
4 (?) +  and 2 (?) +
slightly wider +
elongate +
hemispheric +
rounded-rectangular +
Chlor. Melvill., +
flexuose +
elongate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
thick +  and thin +
obovate +  and ovate +
6 cm60 mm <br />0.06 m <br /> (?) +
Haplodon +
Aplodon +
Splachnaceae +
small;medium-sized +