Aulacomnium androgynum

(Hedwig) Schwagrichen

Sp. Musc. Frond. Suppl. 3(1,1,Aulacomnion): 2. 1827.

EndemicIllustrated
Basionym: Bryum androgynum Hedwig Sp. Musc. Frond., 178. 1801
Treatment appears in FNA Volume 28. Treatment on page 93. Mentioned on page 92.

Plants 1–2 cm, in erect, basal tufts or cushions, green or brownish green. Stems yellow or brownish green; cross-section irregularly pentagonal, cortical cells in 2–4 layers, medulla cell-walls thick or thin, central strand cells small; rhizoids between leaves near base of plants. Leaves distant near base of plants, more congested toward apex, not much different when dry or moist, oblong-lanceolate, widest above base, somewhat concave to keeled; base slightly rounded to insertion; margins revolute to mid leaf, weakly serrulate proximally, irregularly serrulate toward apex; apex acute; costa flexuose; laminal cells round or nearly oblong, papillae blunt; basal-cells 1-stratose, hyaline. Specialized asexual reproduction by small fusiform propagula in tight globose cluster. Perigonia budlike in series down stem; paraphyses of 7–10 cells. Perichaetia with paraphyses of 9–12 cells. Seta 1–1.5 cm. Capsule suberect or horizontal, 2.5–3 mm; operculum conic, rostrum short, blunt; endostome cilia nodose. Spores 10–20 µm, smooth.


Habitat: Organic soil, rotting logs, mineral soil over rock
Elevation: low to moderate elevations

Distribution

V28 143-distribution-map.gif

B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Alaska, Calif., Colo., Idaho, Ill., Maine, Mich., Mont., N.H., N.Y., Oreg., S.Dak., Wash., W.Va., Wyo.

Discussion

The propagula of Aulacomnium androgynum, borne in spheric clusters at the ends of naked branches, are a distinguishing feature. This is the only species of Aulacomnium with small lanceolate leaves that are serrulate mainly beyond mid leaf and shortly rounded at the insertion. The species also lacks a hyalodermis. The distal laminal cells of A. androgynum are round or ± oblong, 1-papillose on abaxial and adaxial walls, with blunt, long papillae and thick walls. The basal laminal cells of the inner perigonial leaves are elongate to rhomboidal, large, and smooth.

Selected References

None.

Lower Taxa

None.
... more about "Aulacomnium androgynum"
acute +, concave +  and keeled +
Norton G. Miller† +
(Hedwig) Schwagrichen +
rounded +, tapered +  and decurrent +
Bryum androgynum +
cucullate +
horizontal +  and suberect +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
thin +  and thick +
nodulose +  and nodose +
flexuose +
B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Alaska +, Calif. +, Colo. +, Idaho +, Ill. +, Maine +, Mich. +, Mont. +, N.H. +, N.Y. +, Oreg. +, S.Dak. +, Wash. +, W.Va. +  and Wyo. +
low to moderate elevations +
Organic soil, rotting logs, mineral soil over rock +
not +  and collenchymatous +
autoicous +, dioicous +  and sexual +
oblongelliptic symmetric weakly concave +  and keeled +
1-papillose +
differentiated +  and isomorphic +
male +  and female +
Sp. Musc. Frond. Suppl. +
roughened +  and smooth +
yellow +  and red +
inclined +  and erect +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Endemic +  and Illustrated +
brownish green +  and yellow +
Orthopixis +  and Sphaerocephalus +
Aulacomnium androgynum +
Aulacomnium +
species +
not +  and collenchymatous +
specialized +
dioicous +  and sexual +
brownish green +  and green +