Philonotis gracillima

Ångström

Philonotis gracillima Ångström, Öfvers. Kongl. Vetensk.-Akad. Förh. 33(4): 17. 1876.

Treatment appears in FNA Volume 28. Treatment on page 108. Mentioned on page 106.

Plants small, delicate, in lax to dense tufts, bright green. Stems 0.5–1 cm, erect, simple to sparingly branched; proximal rhizoids absent or weakly developed. Leaves erect to incurved when dry, erect-spreading to spreading when moist, ovate-oblong to ligulate or ovatelanceolate to ovate, 0.3–1 mm; margins revolute throughout or revolute proximally and plane distally, bluntly serrulate, teeth paired; apex broadly acute to rounded-obtuse; costa 7/8 leaf length or subpercurrent, distal abaxial surface rough; laminal cells obscurely to clearly prorulose at distal ends; basal-cells rectangular, 25–35 × 10–15 µm; distal cells subquadrate to oblong-rhomboidal, 20–30 × 10–12 µm. Specialized asexual reproduction by occasional short brood branches in distal leaf-axils. Sexual condition dioicous; perigonia gemmate. Sporophytes unknown.


Habitat: Moist, rocky, limey soil, rock crevices
Elevation: low to moderate elevations (0-1500 m)

Distribution

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Ala., Fla., Kans., La., Miss., N.C., Okla., Tex., Mexico, West Indies, Central America, South America

Discussion

P. A. Florschütz (1964) treated Philonotis gracillima as a variety of P. uncinata. Philonotis gracillima is distinguished in the flora area by the combination of a broad leaf apex (both broadly acute and rounded-obtuse apices may occur on the same plant), relatively short costa, and lax, pellucid laminal cells.

Selected References

None.

Lower Taxa

None.

"subpercurrent" is not a number.

... more about "Philonotis gracillima"
broadly acute +  and rounded-obtuse +
Dana G. Griffin III +
Ångström +
rectangular +
10um +  and 15um +
enlarged +
occasional +
occasional +
cucullate +
inclined +, horizontal +  and erect +
globose +  and ovoid +
appendiculate +
rudimentary +
subpercurrent +
with centric papilla +  and smooth +
dioicous +, sexual +  and asexual +
subquadrate;oblong-rhomboidal +
Ala. +, Fla. +, Kans. +, La. +, Miss. +, N.C. +, Okla. +, Tex. +, Mexico +, West Indies +, Central America +  and South America +
low to moderate elevations - 0-1500 m +
yellowish;pale-brown +
dark red;reddish-brown +
Moist, rocky, limey soil, rock crevices +
smooth +, papillose +  and mammillose +
ovatelanceolate to ovate +  and ligulate +
erect-spreading;spreading +
ovate-oblong +
0.03 cm0.3 mm <br />3.0e-4 m <br /> - 0.1 cm1 mm <br />0.001 m <br /> +
blunt +  and mammillate or bluntly apiculate +
clavate +  and filiform +
discoid +  and gemmiform +
Philonotis gracillima Ångström, Öfvers. Kongl. Vetensk.-Akad. Förh. +
papillose +
distinct +
5 +  and many +
curved +, flexuose +  and straight +
elongate +
spheric;reniform +
simple +  and sparingly branched +
10 cm100 mm <br />0.1 m <br /> - 16 cm160 mm <br />0.16 m <br /> +
pentagonal +  and 2-fid +
0.5 cm5 mm <br />0.005 m <br /> - 1 cm10 mm <br />0.01 m <br /> +
Bartramidula +
Philonotis gracillima +
Philonotis +
species +
intermediate +
specialized +
synoicous +, autoicous +, dioicous +  and sexual +
enlarged +
differentiated +
thin +  and thick +