Scleropodium julaceum

E. Lawton

Bull. Torrey Bot. Club 94: 22, figs. 1 – 7. 1967.

Endemic
Treatment appears in FNA Volume 28. Treatment on page 465. Mentioned on page 464.

Plants small, in moderately dense mats, green to golden green. Stems 2–5 cm, leafy shoots 0.3–0.4 mm wide, branches strongly julaceous. Stem-leaves closely imbricate, erect and slightly spreading when moist, broadly ovate to semiorbicular, 0.7–0.9 (–1.2) × 0.5–0.6 (–0.7) mm, length to width ratio usually 1.2–1.5:1; margins ± serrulate distally, sometimes almost entire throughout; apex broadly acute or obtuse in smaller leaves; alar cells isodiametric, 9–12 µm, walls moderately thick, region extensive, moderately distinctly delimited; laminal cells 20–60 × 5–9 µm; basal juxtacostal cells quadrate to short-rectangular, 10–15 × 8–10 (–12) µm. Seta 0.6–0.7 cm, rough throughout. Capsule horizontal. Spores 12–19 µm.


Habitat: Rock, tree trunks, open and sunny places
Elevation: low to moderate elevations (0-500 m)

Discussion

Scleropodium julaceum occurs only in southern California, with scattered localities north to Mendocino County. This species often has broadly rounded leaves that easily distinguish it from other species in the genus. Small phenotypes of S. cespitans may be similar in appearance and leaf shape, but they differ in their alar cells, numerous and small in S. julaceum, few and enlarged in S. cespitans. Also, the capsule is horizontal in S. julaceum, suberect in S. cespitans. The stems are fragile; the basal juxtacostal cells are in two to five rows; and the laminal cells are rhombic to linear-flexuose.

Selected References

None.

Lower Taxa

None.

"long" is not a number."broad" is not a number.

... more about "Scleropodium julaceum"
not +  and separating +
obtuse +  and acute +
Michael S. Ignatov +
E. Lawton +
short +  and elongate +
short-decurrent +
rounded +  and narrowed +
decurrent +
short to long +
branching +, sympodial +  and complanate-foliate +
usually straight;curved +
dioicous +  and sexual +
cucullate +
short-cylindric +
specialized +
synoicous +, dioicous +, autoicous +, sexual +  and asexual +
quadrate +  and short-rectangular +
small +  and enlarged +
differentiated +
8um +  and 10um +
3 (?) +  and 2 (?) +
discernible +
low to moderate elevations (0-500 m) +
not adherent +
Rock, tree trunks, open and sunny places +
5um (?) +  and 9um (?) +
pointed +
moderate to somewhat +
entire +  and serrulate +
serrulate +  and subentire +
perfect +  and xerocastique +
hygrocastique +
acute;triangular +
Bull. Torrey Bot. Club +
pellucid +  and opaque +
triangular +
extensive +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +  and 0.04 cm0.4 mm <br />4.0e-4 m <br /> (?) +
imbricate;imbricate;imbricate;imbricate;imbricate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
0.7mm;0.9mm +
spreading +  and erect +
broadly ovate +  and semiorbicular +
0.5mm;0.6mm +
branched +  and foliate +
reddish +  and green +
pendent +, arching +, erect +, ascending +  and creeping +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Scleropodium julaceum +
Scleropodium +
species +
incrassate +
green +  and golden green +