Asplenium ×curtissii

Linnaeus

Bull. Torrey Bot. Club 33: 194. 1906.

Common names: Curtiss's spleenwort
Treatment appears in FNA Volume 2.

Roots proliferous. Stems erect, unbranched; scales blackish throughout, narrowly deltate, 1 × 0.2 mm, margins entire. Leaves monomorphic. Petiole brownish black, 3–10 (–15) cm, 1/3–2/5 length of blade; indument of blackish, narrowly lanceolate scales at base. Blade oblong-lanceolate, 2-pinnate, 10–30 × (1.5–) 5–10 cm, thin, glabrous; base not or only slightly tapered; apex gradually narrowing, not rooting. Rachis blackish to green, dull, nearly glabrous. Pinnae in (7–) 14–22 pairs, oblong; medial pinnae 1–6 × 0.5–1.5 cm; base truncate; apex pointed. Pinnules linear to fan-shaped to unequally pinnate, 3–9 × 1–7 mm, mostly notched apically. Veins free, evident. Sori 1–4 per segment, usually more on acroscopic side. Spores abortive. 2n = 108.


Habitat: Shaded damp limestone rocks
Elevation: 0–50 m

Discussion

Asplenium × curtissii, sterile and with irregular meiosis, is the product of hybridization between A. abscissum and A. verecundum and occurs with them in central Florida, sometimes forming large colonies by root proliferation. It can readily be separated from A. abscissum by its pinnate blades. From A. verecundum it can be distinguished by its relatively long petioles and less divided blades. Asplenium × curtissi is known only from several localities in north central Florida. It makes a showy conservatory plant.

Selected References

None.

Lower Taxa

None.
... more about "Asplenium ×curtissii"
not rooting +
narrowing +
Warren H. Wagner Jr. +, Robbin C. Moran +  and Charles R. Werth +
Linnaeus +
tapered +
simple +  and 4-pinnate +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
oblong-lanceolate +
thin;5cm;10cm +
Curtiss's spleenwort +
0–50 m +
Shaded damp limestone rocks +
monomorphic +
fertile +  and than sterile ones +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
perforate +, reticulate +, spiny +  and winged +
not articulate +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
brownish black +
1/3 length of blade;2/5 length of blade +
c--shaped +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
notched;linear;fan-shaped +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Bull. Torrey Bot. Club +
blackish +  and green +
proliferous +
1 cm10 mm <br />0.01 m <br /> (?) +
lanceolate +  and deltate +
less lunate;linear +
dorsiventral +  and symmetric +
Asplenium ×curtissii +
Asplenium +
species +
anastomosing +