Microsorum siamensis T. Boonkerd

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Scientific name

Microsorum siamensis
T. Boonkerd

Clade/Class

Polypodiopsida

Group

Pteridophytes

Family

Polypodiaceae

Genus

Microsorum

Clade/Subclass

Polypodiidae

Order

Polypodiales

Sub Family

Microsoroideae

Tribe

_

Rhizome slender, short-creeping. Scales densely set, slightly spreading, widest near the base, ovate or triangular, peltate, margin denticulate, apex acuminate to caudate, clathrate throughout. Frond monomorphous, iridescent blue-green in colour when living, havana brown to raw umber in dry specimens. Lamina simple, hydathodes scattered on upper surface, elliptic to narrowly elliptic. Sori seperate, usually occupying the upper half portion of the lamina, more or less round, superficial; paraphysis absent; sporangium hyaline when young, turning yellowish-brown when mature; spores concavo-convex, brightly golden yellow.

Habitat

In rock crevices on moist rock of limestone hills in semi-shade, about 100 m. altitude

Locality

Yala Province

Date of collection

Type specimen

P. V. Fern 1 (holo L; iso BCU)