Pleuridium subulatum

(Hedwig) Rabenhorst

Deutschl. Krypt.-Fl. 2(3): 79. 1848,.

Basionym: Phascum subulatum Hedwig Sp. Musc. Frond., 19. 1801
Synonyms: Pleuridium alternifolium var. lancastriense Sullivant & Lesquereux Pleuridium alternifolium var. robustum Sullivant & Lesquereux
Treatment appears in FNA Volume 27. Treatment on page 465. Mentioned on page 463, 464.

Stem-leaves patent to erect-spreading, concave, lamina 1-stratose throughout; proximal leaves minute and bractlike, long-deltoid, subulate, 0.38–0.8 × 0.15–0.23 mm, entire proximally, minimally serrulate to entire distally; distal stem-leaves with oblong-ovate base, apex subulate, 1.03–2.13 × 0.18–0.35 mm, entire proximally, infrequently serrulate distally; costa narrow, percurrent. Perichaetial leaves oblong-ovate, gradually narrowed to long-subulate, frequently crisped awn, 2.25–3.43 × 0.23–0.4 mm, margins entire proximally, irregularly serrate to serrulate distally in the subula; basal-cells loosely rectangular; median cells irregular, subquadrate to shortrectangular to rhomboidal; distal cells in subula oblong to trapezoidal; costa percurrent, filling the tubulose subula; transverse-section of costa at mid leaf with central guide cells forming a row across the width between a more restricted band of adaxial stereids and an extensive abaxial stereid band, accessory-cells sandwiched in the center; innermost perichaetial leaves ovate, more or less sheathing base and acuminate tip, subpercurrent. Specialized asexual reproduction absent. Sexual condition autoicous, antheridia naked in persistent axillary leafy buds, one to several along the distal part of stem. Seta 0.25–0.53 mm. Spores 25–31.3 µm, densely and finely papillose, light orangebrown in mass.


Habitat: Tufts on wet sandy soil in roadside ditches and moist habitats
Elevation: low to moderate elevations

Distribution

B.C., N.B., N.S., Ont., Que., Ala., Ark., Calif., Conn., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Nebr., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., S.C., Tenn., Vt., Va., Wash., W.Va., Wis., West Indies (Puerto Rico), Europe

Discussion

The chromosome number of Pleuridium subulatum is n = 13 (V. S. Bryan 1956; H. A. Crum and L. E. Anderson 1981; A. J. E. Smith and M. E. Newton 1968). It and P. acuminatum are morphologically similar. Pleuridium subulatum is distinguished by its autoicous sexual condition and 1-stratose lamina at leaf shoulder.

Selected References

None.

Lower Taxa

None.
... more about "Pleuridium subulatum"
forming a marginal border +  and not differentiated +
serrulate +  and entire +
0.103 cm1.03 mm <br />0.00103 m <br /> (0.213 cm2.13 mm <br />0.00213 m <br />) +
0.18mm +  and 0.35mm +
Kwok Leung Yip +
(Hedwig) Rabenhorst +
0.225 cm2.25 mm <br />0.00225 m <br /> (0.343 cm3.43 mm <br />0.00343 m <br />) +
crisped +
0.23mm;0.4mm +
rectangular +
specialized +
subpercurrent +
sexual +  and asexual +
oblong-ovate +
Phascum subulatum +
small +
cucullate +
orange;brownish +
cleistocarpous +
long-exserted +
ovoid +  and elliptical +
percurrent;percurrent +
subpercurrent +
shortrectangular +  and isodiametric +
monoicous +  and sexual +
oblong;lanceolate +
B.C. +, N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Calif. +, Conn. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, West Indies (Puerto Rico) +  and Europe +
low to moderate elevations +
Tufts on wet sandy soil in roadside ditches and moist habitats +
curved +  and straight +
3 (?) +  and 8 (?) +
subulate +, acuminate +  and lanceolate +
irregularly serrate +  and serrulate +
undifferentiated +
toothed;serrate;plane +
conic +  and short-rostrate +
gradually narrowed +  and long-subulate +
with a longer , broader sheathing base +  and differentiated +
on short branches +  and axillary +
filamentous +
minimally serrulate +  and entire +
0.038 cm0.38 mm <br />3.8e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.015 cm0.15 mm <br />1.5e-4 m <br /> (0.023 cm0.23 mm <br />2.3e-4 m <br />) +
Deutschl. Krypt.-Fl. +
yellow;orange reddish-brown brown or reddish purple +
elongate +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.053 cm0.53 mm <br />5.3e-4 m <br />) +
light orangebrown +
spherical +
patent +  and erect-spreading +
branched +  and simple +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
superficial +
4 +  and 10 +
oblong +  and trapezoidal +
Pleuridium alternifolium var. lancastriense +  and Pleuridium alternifolium var. robustum +
Pleuridium subulatum +
Pleuridium +
species +
specialized +
subpercurrent +
sexual +  and asexual +
acuminate +
specialized +
synoicous +, paroicous +, autoicous +, dioicous +  and sexual +
plant +  and gregarious +
small +  and medium-sized +