Alsia

Sullivant

Proc. Amer. Acad. Arts 3: 184. 1855.

Etymology: Anagram of generic name Lasia (now Forsstroemia), alluding to similarity
Treatment appears in FNA Volume 28. Treatment on page 627. Mentioned on page 584, 590, 623, 624, 646.
 TaxonIllustrator 
LeptAlsiaCalifornica.jpegAlsia californicaPatricia M. Eckel

Secondary stems pinnate and frondiform distally; paraphyllia present; pseudoparaphyllia dissected-lanceolate to subfoliose. Stem-leaves loosely imbricate when dry, spreading when moist, lanceolate to oblong-lanceolate; margins strongly recurved at base, plane at apex, entire or sometimes weakly serrulate at apex; apex acute to acuminate; costa variable on same plant, weak and almost ecostate, double and short, or strong and disappearing mid leaf; alar region filling basal angles, extending up margins to 1/2 leaf length; medial laminal cells oval-oblong. Branch leaves smaller, narrower. Sexual condition dioicous; perichaetial leaf apex filiform-acuminate. Seta 3–5 mm. Capsule erect-symmetric or nearly so, barely exserted beyond perichaetial leaves, oblong-cylindric; stomata basal, sunken; operculum oblique-rostrate; exostome teeth free, broadly subulate, punctulate-scabrous; endostome well developed. Calyptra naked. Spores 20 µm, light-brown.

Distribution

w North America, nw Mexico

Discussion

Species 1.

Alsia is strikingly similar to Forsstroemia trichomitria, but the two taxa are completely distinct geographically. Alsia is endemic to the west coast of North America, while F. trichomitria is broadly distributed in eastern North America, occurring no further west than Oklahoma. The stems of Alsia are densely invested with paraphyllia, while paraphyllia are absent in F. trichomitria.

Selected References

None.

Lower Taxa

"elongating" is not a number.

... more about "Alsia"
acute +  and acuminate +
Clayton C. Newberry +
Sullivant +
simple;many-branched +
dioicous +  and sexual +
incurved +  and erect +
short;elongate +
cucullate +
nearly +  and erect-symmetric +
oblong-cylindric +
quadrate;transversely elongate +
w North America +  and nw Mexico +
Anagram of generic name Lasia (now Forsstroemia), alluding to similarity +
spreading;erect-spreading;squarrose +
ovatelanceolate +
serrulate +  and entire +
dioicous +, autoicous +, sexual +  and asexual +
oblique-rostrate +
2 (?) +  and 1 (?) +
dissected-lanceolate +
Proc. Amer. Acad. Arts +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
light-brown +
spheric +
lanceolate +  and oblong-lanceolate +
Leptodontaceae +
light-brown +
light green;yellow-green +