Acroporium smallii

(R. S. Williams) H. A. Crum & L. E. Anderson

Bryologist 63: 43. 1960.

EndemicIllustrated
Basionym: Sematophyllum smallii R. S. Williams Bryologist 23: 76, plate 6. 1920
Treatment appears in FNA Volume 28. Treatment on page 572.

Plants delicate, in creeping mats. Stems with branches 0.4–0.6 mm, 0.7–1 mm across leafy branch, main-stem and branches arching upward, stem and branch apices with penicillate group of abruptly imbricate leaves. Leaves 0.5–0.7 mm; margins incurved distally to form tubulose apex; supra-alar cells short. Specialized asexual reproduction rare, by filamentous gemmae. Perigonia on branches. Perichaetia on stems or branches. Seta red. Capsule 0.4–0.6 mm; annulus absent; exostome teeth 16, lanceolate, finely striate, longitudinally furrowed; endostome basal membrane wide, segments equal to exostome teeth length, cilia 1, short, occasionally rudimentary. Calyptra smooth. Spores spheric, 13–14 µm, slightly roughened.


Phenology: Capsules mature summer.
Habitat: Rotten logs, tree bark, charred wood, moist live-oak hammocks
Elevation: low elevations (0 m)

Discussion

Distinctive gametophytic traits of Acroporium smallii include long-ovate leaves with erect margins, linear medial laminal cells, and alar cells much inflated and sharply differentiated from more distal cells. The species is confined to Miami-Dade County.

Selected References

None.

Lower Taxa

None.

"equal" is not a number.

... more about "Acroporium smallii"
Wilfred B. Schofield† +
(R. S. Williams) H. A. Crum & L. E. Anderson +
Sematophyllum smallii +
cucullate +
erect +  and inclined +
ovoid +  and cylindric +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
specialized +
autoicous +, dioicous +, synoicous +  and sexual +
inflated +  and elongate +
differentiated +
rudimentary +
low elevations (0 m) +
filamentous +
penicillate +
Rotten logs, tree bark, charred wood, moist live-oak hammocks +
1-papillose +  and smooth +
autoicous +  and sexual +
falcate;narrowly broadly ovatelanceolate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
small;large +
rostrate +  and conic +
Capsules mature summer. +
elongate +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Endemic +  and Illustrated +
spheric +
falcate-secund +
widespreading +  and erect-spreading +
tapering;lanceolate;broadly ovate +
simple +, weakly complanate-foliate +  and irregularly regularly pinnate +
redbrown +  and reddish green +
arching +, erect +, sometimes +  and reclining +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
Acroporium smallii +
Acroporium +
species +
yellowish;golden yellow +