Trichomanes krausii

Hooker & Greville

Icon. Filic. 2: plate 149. 1830.

Common names: Kraus's bristle fern
Illustrated
Synonyms: Didymoglossum krausii (Hooker & Greville) C. Presl
Treatment appears in FNA Volume 2.

Plants epiphytic or on rock. Stems long-creeping, threadlike, bearing scattered leaves; stems covered with dark hairs of 2 types: 2-celled glandular-hairs and elongate rhizoidlike hairs; roots absent. Leaves oblong, 1–2-pinnatifid, 1–5 × 0.5–1.5 cm, with dark, stellate marginal hairs between lobes, 2-celled glandular-hairs on petioles and veins, and dark rhizoidlike hairs on petioles and sometimes abaxially on blades; petioles shorter than blades. Venation pinnate with unconnected false veins. Soral involucres terminal on lobes near leaf apices, conic, flaring at mouth; involucre lips narrowly dark-edged. Gametophytes composed entirely of branching filaments. Gemmae composed of short filaments of undifferentiated cells. 2n = 136.


Habitat: On rock walls of limestone sinks or epiphytic on trunks and roots of trees growing in and around limestone sinks
Elevation: below 10 m

Distribution

V2 603-distribution-map.gif

Fla., Mexico, West Indies, Central America, South America

Discussion

Trichomanes krausii is fairly common in and around limestone sinks in hardwood forests in Dade County, Florida. Gametophytes may be found occasionally in the vicinity of sporophytes, but they do not form large independent colonies.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Trichomanes krausii"
gemmiferous +
Donald R. Farrar +
Hooker & Greville +
simple;decompound +
with scattered , multicellular , gland-tipped hairs +  and glabrous +
oblong;lanceolate +
dentate +  and entire +
undifferentiated +
Kraus's bristle fern +
Fla. +, Mexico +, West Indies +, Central America +  and South America +
below 10 m +
unconnected +
with proximal filamentous net +  and filamentous +
On rock walls of limestone sinks or epiphytic on trunks and roots of trees growing in and around limestone sinks +
rhizoid-like +  and elongate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1-2-pinnatifid;oblong +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
lobed +  and entire +
winged +  and wiry +
thread-like +
Icon. Filic. +
flaring +  and conic +
Illustrated +
globose +
multicellular +  and branched +
thread-like +
Didymoglossum krausii +
Trichomanes krausii +
Trichomanes +
species +
on rock +  and epiphytic +