Asplenium adulterinum

J. Milde

Höh. Sporenpfl. Deutschl. 40. 1865.

Common names: Adulterated spleenwort
Treatment appears in FNA Volume 2.

Roots not proliferous. Stems short-creeping, mainly unbranched; scales black or with narrow pale borders, narrowly lanceolate, 1.5–3 × 0.2–0.4 mm, margins entire. Leaves monomorphic. Petiole dark reddish-brown throughout, 1–4 mm; indument of black linear scales at base. Blade linear, 1-pinnate, 2.5–14 × 0.5–1.2 cm, thick (open habitat) to herbaceous (shaded, moist habitat), essentially glabrous; base somewhat tapered; apex obtuse, not rooting. Rachis reddish-brown in proximal 1/2–4/5, green distally, lustrous, glabrous. Pinnae in 10–30 pairs, ovate to rhombic to ovate-oblong, 2.5–11 × 2–6 mm; base truncate to shortly acute; margins shallowly crenate (shade-forms) to essentially entire (exposed forms); apex obtuse, broadly rounded. Veins free, evident to obscure. Sori 1–3 pairs per pinna on both basiscopic and acroscopic sides. Spores 64 per sporangium. 2n = 144.


Habitat: Crevices in limestone
Elevation: 1250 m

Discussion

In North America Asplenium adulterinum is known to occur on Vancouver Island, British Columbia, where only the fertile allotetraploids are known. It is likely to occur in areas where the two parents, A. trichomanes and A. trichomanes-ramosum, grow together. The genetics of the American plants should be compared with that of the European, among which two nothosubspecies occur (F. Mokry et al. 1986).

Selected References

None.

Lower Taxa

None.
... more about "Asplenium adulterinum"
not rooting +
Rounded (?) +  and Obtuse (?) +
Warren H. Wagner Jr. +, Robbin C. Moran +  and Charles R. Werth +
J. Milde +
truncate +  and shortly acute +
simple +  and 4-pinnate +
2.5 cm25 mm <br />0.025 m <br /> (14 cm140 mm <br />0.14 m <br />) +
thick;0.5cm;1.2cm +
Adulterated spleenwort +
B.C. +  and Europe +
1250 m +
Crevices in limestone +
monomorphic +
fertile +  and than sterile ones +
shallowly crenate +  and essentially entire +
perforate +, reticulate +, spiny +  and winged +
not articulate +
dark reddish-brown +
c--shaped +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Höh. Sporenpfl. Deutschl. +
green +  and reddish-brown +
not proliferous +
black +  and with narrow pale borders +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
lanceolate +
0.2mm;0.4mm +
acroscopic +  and basiscopic +
less lunate;linear +
dorsiventral +  and symmetric +
Asplenium adulterinum +
Asplenium +
species +
anastomosing +
evident +  and obscure +