Arachniodes

Blume

Enum. Pl. Javae 2: 241. 1828.

Common names: East Indian holly fern
Etymology: Greek arachnion, spider's web, and -odes, having the form or nature of it has been suggested that Blume saw fungal hyphae or spider webs on his original material
Treatment appears in FNA Volume 2.

Plants terrestrial. Stems moderately long to short-creeping, stolons absent. Leaves monomorphic, evergreen. Petiole ± as long as blade, base not swollen; vascular-bundles more than 3, arranged in an arc, ± round in cross-section. Blade broadly deltate or pentagonal, 2–3-pinnate-pinnatifid, gradually to abruptly reduced distally to pinnate or pinnatifid apex, papery to somewhat leathery. Pinnae not articulate to rachis, segment margins and especially apex spinulose; proximal pinnae largest, petiolulate, inequilateral with basal basiscopic pinnule much larger and more elongate than more distal pinnules; costae adaxially grooved, grooves continuous from rachis to costae to costules; indument of hairlike scales abaxially, absent adaxially. Veins free, forked. Sori in 1 row between midrib and margin, round; indusia round-reniform, attached at narrow sinus, persistent. Spores brownish, rugate or tuberculate, sometimes spiny. x = 41.

Distribution

Tropics and subtropics, mostly in e Asia and Pacific Islands, a few in Africa, ca. 4 in Mexico, Central America, South America

Discussion

Species ca. 50 (1 in the flora naturalized from Asia).

... more about "Arachniodes"
Alan R. Smith +
not swollen +
simple to commonly +
2-3-pinnate-pinnatifid;pentagonal;deltate +
reduced +
roundish +
East Indian holly fern +
Tropics and subtropics +, mostly in e Asia and Pacific Islands +, a few in Africa +, ca. 4 in Mexico +, Central America +  and South America +
Greek arachnion, spider's web, and -odes, having the form or nature of +  and it has been suggested that Blume saw fungal hyphae or spider webs on his original material +
often +  and glabrous +
round-reniform +
monomorphic +
evergreen +
not articulate +
inequilateral +
Enum. Pl. Javae +
round +, cuplike +, hoodlike +, reniform +, falcate +  and linear +
ching1934a +, gordon1981a +  and tindale1960a +
2 (?) +  and 3 (?) +
persistent +
hairlike +
discrete +
reniform +  and oblong +
dictyostelic +, unbranched +  and branched +
creeping +  and erect +
Arachniodes +
Dryopteridaceae +
anastomosing +  and simple +
epiphytic +  and hemiepiphytic +