Aongstroemia

Bruch & Schimper

Bryol. Europ. 1: 171. 1846 ,.

Etymology: For Johan Ångström, 1813–1879, Swedish bryologist
Treatment appears in FNA Volume 27. Treatment on page 360. Mentioned on page 359, 361.
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 TaxonIllustrator 
Dicr Aongstroemia longipes 2007 02 20.jpegAongstroemia longipesPatricia M. Eckel

Plants small, gregarious or in loose thin mats or tufts, yellowish green, orange-red to brown-green, rather dull. Stems erect, 3–6 (–12) mm, simple or occasionally forked, central strand present; scarcely radiculose, rhizoids red, smooth. Leaves ovate or shortly lanceolate-acuminate, concave proximally, tubulose when acuminate, erect and appressed-imbricate when dry, somewhat loosely so when moist; apices in proximal leaves broadly acute grading to obtuse to acuminate-subulate in distal leaves; margins plane to incurved, entire, notched at the apex; costa prominent, single, ending before the apex, smooth on all surfaces, guide cells in 1 row, stereid bands 2, the adaxial band reduced, abaxial and adaxial epidermis prominent; laminal cells convex in section, without pits, smooth, mostly elongate throughout, shorter in the apex, walls in surface view thick-walled, irregularly elongate-hexagonal, rhomboid or rectangular, alar cells undifferentiated. Specialized asexual reproduction absent. Sexual condition dioicous; perigonial plants similar to the perichaetial, perigonium terminal, conspicuous, perigonial leaves larger than the cauline leaves, broadly lanceolate-triangular with an abrupt acumination, broadly tubulose; perichaetium terminal, conspicuous, leaves larger than stem-leaves, convolute-sheathing, abruptly long-acuminate to subulate. Seta elongate, smooth, erect, yellow-orange to red. Capsule erect, globose, ovate or short-cylindric, straight, symmetric, smooth wet or dry, annular cells weakly differentiated in one layer; operculum conic to short-rostrate, oblique; peristome variably absent or present, single, 16 teeth ± cleft to 1/2 the length, vertically pitted-striolate basally, weakly papillose to smooth distally, reddish-brown to nearly hyaline. Calyptra cucullate, smooth, naked, fugacious. Spores 12–20 µm, smooth to finely papillose.

Distribution

North America, Mexico, Central America, South America, Eurasia, Atlantic Islands

Discussion

Species 7 (1 in the flora).

The highest diversity for Aongstroemia is in Mexico, Central America, and South America.

Selected References

None.

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

... more about "Aongstroemia"
persistent +  and deciduous +
obtuse;acuminate-subulate +
Patricia M. Eckel +
Bruch & Schimper +
short to long +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
dry +, wet +  and smooth +
short-cylindric +, ovate +  and globose +
specialized +
undifferentiated +
papillose +  and mammillose +
dioicous +, sexual +  and asexual +
annular +
differentiated +
percurrent;excurrent +
North America +, Mexico +, Central America +, South America +, Eurasia +  and Atlantic Islands +
For Johan Ångström, 1813–1879, Swedish bryologist +
appressed-imbricate +
abruptly long-acuminate +  and subulate +
larger +
notched +  and plane +
conic +  and short-rostrate +
nonpitted +  and pitted +
toothed +  and forked +
lanceolate-triangular +
pitted-striolate +
16 +  and single +
papillose +  and striolate +
undifferentiated +
Bryol. Europ. +
yellow-orange;red +
flexuose +  and straight +
elongate +
spheric +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
superficial +
Aongstroemia +
Dicranaceae +
deciduous +
reddish-brown +  and nearly hyaline +
weakly papillose;smooth +
lanceolate +
thick-walled +
rectangular +, rhomboid +  and elongate-hexagonal +
orange-red +  and brown-green +
plant +, in loose thin mats or tufts +  and gregarious +