Molendoa ogalalensis

(G. L. Smith) R. H. Zander

Bull. Buffalo Soc. Nat. Sci. 32: 170. 1993,.

Basionym: Ozobryum ogalalensis G. L. Smith Novon 2: 255, figs. 1, 2. 1992
Treatment appears in FNA Volume 27. Treatment on page 564. Mentioned on page 562, 565.

Stems to 2 cm, sclerodermis lacking or very weak. Leaves ovate to elliptic [spathulate], 0.3–0.6 [–1] mm, entire, apex rounded; leaf base not much differentiated in size and shape, not sheathing; costa ending below the leaf apex, rounded in section at mid leaf, guide cells 2; distal laminal cells roundedquadrate, 1: 1, [1–] 2 (–3) -stratose marginally or entirely.


Habitat: Eroded mortarbed (cemented arkosic sand and gravel deposits) outcrops
Elevation: moderate elevations

Distribution

V27 811-distribution-map.gif

Kans., Nebr., Mexico (Sonora)

Discussion

Molendoa ogalalensis is known in the flora area from four localities in the central High Plains. It is unusual in the genus in the distal laminal cells having walls of equal thickness both superficially and internally. Other species of the genus commonly have the superficial walls clearly thicker than the internal, though this is not a rule. The large papillae centrally placed on the lumen is reminiscent of Tuerckheimia, which, however, is acrocarpous and has acute leaf apices. Although M. ogalalensis is not easily recognized, the lack of a distinct stem sclerodermis, 2-stratose distal lamina, each lumen with a massive simple or weakly 2-fid papilla, evenly thickened superficial and internal cell walls, and lateral perichaetia are diagnostic. It has a stem central strand (contrary to the original description). Costal stereid cells are commonly absent (the abaxial band is occasionally present).

Selected References

None.

Lower Taxa

None.
... more about "Molendoa ogalalensis"
quadrate +  and elongate +
flat +  and broadly or narrowly channeled +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
differentiated +
Richard H. Zander +
(G. L. Smith) R. H. Zander +
obovoid;spindle-shaped +
rounded +  and crescentlike +
papillose +  and smooth +
usually slightly wider +
elliptic-sheathing +
usually ovate;oblong +
differentiated +
Ozobryum ogalalensis +
obovoid +
mitrate +  and cucullate +
cleistocarpous +  and stegocarpous +
monoicous +, dioicous +  and sexual +
flat +  and bulging +
thick-walled +
1 (?) +  and 3 (?) +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
excurrent +  and percurrent +
rounded +
in patches +, 2-stratose +, sinuolate +  and entire +
denticulate +  and plane +
rounded-triangular;oval;roundedquadrate;irregular;rounded-triangular;oval;roundedquadrate;irregular +
Kans. +, Nebr. +  and Mexico (Sonora) +
moderate elevations +
differentiated +
multicellular +
Eroded mortarbed (cemented arkosic sand and gravel deposits) outcrops +
yellow +  and orange-red or red +
yellow +  and yellow-orange +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
ligulate +  and twisted +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
differentiated +
ovate +  and elliptic +
reduced +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
dentate +  and entire +
short-conic;short-rostrate +
photosynthetic +
multifid +, 2-fid +  and scablike +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
1 (?) +, 2 (?) +  and 5 (?) +
Bull. Buffalo Soc. Nat. Sci. +
straight +
serrulate +  and sheathing +
ovatelanceolate +
2 +  and 1 +
elongate +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dioicous +  and sexual +
usually thicker +
Anoectangium subg. Molendoa +, Ozobryum +  and Pleuroweisia +
Molendoa ogalalensis +
Molendoa +
species +
ovoid;cylindric +
proximal +
red +  and yellow +
thickened +  and thin +
stemless +  and perigoniate +
tan;brown;dark;light green +
occasionally smaller than the perichaetiate +