Asplenium trichomanes-ramosum

Linnaeus

Sp. Pl. 2: 1082. 1753.

Common names: Green spleenwort doradille verte
Synonyms: Asplenium viride Hudson
Treatment appears in FNA Volume 2.

Roots not proliferous. Stems short-creeping or ascending, frequently branched; scales dark reddish-brown to blackish throughout, narrowly deltate, 2–4 × 0.2–0.4 mm, margins entire to undulate or with widely spaced shallow teeth. Leaves monomorphic. Petiole reddish-brown at base, green distally, lustrous, 1–5 (–6) cm, 1/4–1/2 (–1) times length of blade; indument of dark reddish-brown to black, narrowly deltate scales grading into glandular-hairs. Blade linear, 1-pinnate throughout, 2–13 × 0.6–1.2 cm, thin, glabrous or with sparse minute hairs; base slightly tapering or truncate; apex acute, not rooting. Rachis green throughout, dull, glabrous or with scattered hairs as on petioles. Pinnae in 6–21 pairs, deltate to rhombic; medial pinnae 5–6 × 4–5 mm; base obtuse and often inequilateral; distal margins crenate; apex rounded to acute. Veins free, evident. Sori 2–4 pairs per pinna, on both basiscopic and acroscopic sides. Spores 64 per sporangium. 2n = 72.


Habitat: Limestone and other basic rocks
Elevation: 0–4000 m

Distribution

V2 150-distribution-map.gif

Greenland, Alta., B.C., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Yukon, Alaska, Calif., Colo., Idaho, Maine, Mich., Mont., Nev., N.Y., Oreg., S.Dak., Utah, Vt., Wash., Wis., Wyo.

Discussion

Hybridization between Asplenium trichomanes-ramosum and A. trichomanes produces the fertile allotetraploid A. adulterinum, which occurs on Vancouver Island.

Selected References

None.

Lower Taxa

None.
not rooting +
Rounded (?) +  and Acute (?) +
Warren H. Wagner Jr. +, Robbin C. Moran +  and Charles R. Werth +
Linnaeus +
inequilateral +, obtuse +, truncate +  and tapering +
simple +  and 4-pinnate +
2 cm20 mm <br />0.02 m <br /> (13 cm130 mm <br />0.13 m <br />) +
with sparse minute hairs +  and glabrous +
thin;0.6cm;1.2cm +
Green spleenwort +  and doradille verte +
Greenland +, Alta. +, B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Maine +, Mich. +, Mont. +, Nev. +, N.Y. +, Oreg. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wis. +  and Wyo. +
0–4000 m +
Limestone and other basic rocks +
minute +
monomorphic +
fertile +  and than sterile ones +
with widely spaced shallow teeth +, entire +  and undulate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
perforate +, reticulate +, spiny +  and winged +
not articulate +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
green +  and reddish-brown +
1/4-1/2(-1) times length of blade +
c--shaped +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
with scattered hairs +  and glabrous +
not proliferous +
dark reddish-brown +  and black +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
deltate +
0.2mm;0.4mm +
acroscopic +  and basiscopic +
less lunate;linear +
dorsiventral +  and symmetric +
ascending +  and short-creeping +
Asplenium viride +
Asplenium trichomanes-ramosum +
Asplenium +
species +
shallow +
anastomosing +