Selaginella viridissima

Weatherby

J. Arnold Arbor. 24: 326. 1943.

Common names: Slender spike-moss
Conservation concern
Synonyms: Selaginella coryi Weatherby
Treatment appears in FNA Volume 2.

Plants on rock, forming clumps or mounds. Stems radially symmetric, underground (rhizomatous) and aerial, not readily fragmenting, irregularly forked; rhizomatous and aerial stems often with 1 branch arrested, budlike, tips straight; aerial stems mainly erect, seldom ascending, with budlike arrested branches throughout stem length. Rhizophores borne on upperside of stems, restricted to rhizomatous stems and lower 1/4 of aerial stems, 0.16–0.3 mm diam. Leaves dimorphic, not clearly ranked. Rhizomatous stem-leaves loosely appressed, straight, scalelike. Aerial stem-leaves appressed, ascending, green, linear-lanceolate to narrowly lanceolate, 1.8–2.1 × 0.49–0.56 mm; abaxial ridges prominent; base cuneate and decurrent to slightly rounded and adnate, glabrous; margins denticulate to very short-ciliate, cilia transparent, spreading to ascending toward apex, 0.02–0.04 mm; apex acute or seldom blunt. Strobili solitary, 0.5–1.2 (–2.5) cm; sporophylls deltate-ovate to ovatelanceolate, abaxial ridges prominent, base glabrous, margins denticulate, apex acute to obtuse.


Habitat: Shaded cliffs, slopes, rock crevices, and igneous rock
Elevation: 1650–2300 m

Discussion

In Texas Selaginella viridissima is known only from the Chisos Mountains.

Of conservation concern.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Selaginella viridissima"
Acute (?) +  and Obtuse (?) +
Iván A. Valdespino +
Weatherby +
decurrent +  and slightly rounded +
transparent +
0.002 cm0.02 mm <br />2.0e-5 m <br /> (0.004 cm0.04 mm <br />4.0e-5 m <br />) +
Slender spike-moss +
Tex. +  and Mexico in Coahuila +
1650–2300 m +
Shaded cliffs, slopes, rock crevices, and igneous rock +
monomorphic +
fertile +  and vegetative +
linear-lanceolate;linear +
ciliate +  and serrate +
denticulate;denticulate to very +
globose +, ovoid +  and tetrahedral +
tetrahedral +
J. Arnold Arbor. +
alternating +
0.016 cm0.16 mm <br />1.6e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Conservation concern +
adjacently +  and monomorphic +
fertile +  and vegetative +
1.8mm;2.1mm +
linear-lanceolate +  and narrowly lanceolate +
0.49mm;0.56mm +
rhizomatous +
budlike +  and symmetric +
dimorphic +, climbing +  and cespitose +
decumbent;creeping;prostrate +
aerial +  and underground +
ascending;erect +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
quadrangular +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Selaginella coryi +
Selaginella viridissima +
Selaginella subg. Tetragonostachys +
species +
straight +
branched +  and not articulate +
erect +  and creeping +
branched +  and not articulate +
erect +  and creeping +
differentiated +
perennial +  and annual +
epiphytic +  and hemiepiphytic +
12 +, 11 +, 10 +, 9 +, 8 +  and 7 +