Pityrogramma calomelanos var. calomelanos

(Linnaeus) Link
Introduced
Treatment appears in FNA Volume 2.

Leaves 25–120 cm. Petiole black, dull, glabrous or sparsely scaly proximally. Blade elongate-triangular to ovatelanceolate, 2-pinnate-pinnatifid, sometimes 3-pinnate proximally, densely white-farinose abaxially. Pinnae narrowly triangular, pinnately lobed or divided, flat surfaces in plane of blade. Pinnules short-stalked or sessile, lanceolate, margins serrate to lobed near base. Spores with perispore reticulate and with equatorial flange.


Habitat: Ditches in forested areas
Elevation: 0–20 m

Distribution

V2 287-distribution-map.gif

Introduced; Fla., Mexico, West Indies in the Antilles, Central America, South America, widely naturalized in tropical Africa

Discussion

Pityrogramma calomelanos var. calomelanos is commonly cultivated in greenhouses. In Florida, it is known from a small number of sites in Hillsborough and Polk counties, where it possibly escaped from cultivation. Pityrogramma calomelanos var. austroamericana (Domin) Farwell (Costa Rica to Brazil) is characterized by yellow farina; P. calomelanos var. ochracea (C. Presl) R. M. Tryon (Honduras to Bolivia) possesses scattered trichomes instead of farinose indument.

Selected References

None.

Lower Taxa

None.
George Yatskievych +  and Michael D. Windham +
(Linnaeus) Link +
cuneate +
Acrostichum calomelanos +
white-farinose +
2-pinnate-pinnatifid +, elongate-triangular +  and ovatelanceolate +
Fla. +, Mexico +, West Indies in the Antilles +, Central America +, South America +  and widely naturalized in tropical Africa +
0–20 m +
yellow +  and white +
obcordate;reniform +
Ditches in forested areas +
monomorphic +
recurved +  and reflexed +
noncircinate +  and circinate +
25 cm250 mm <br />0.25 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
not recurved +
serrate +  and lobed +
scaly +  and glabrous +
lanceolate +
nearly;concolored;brown +
persistent +
lanceolate +
Introduced +
1 +, 32 +  and 64 +
tetrahedral-globose +
not lustrous +
nearly +  and erect +
Pityrogramma calomelanos var. calomelanos +
Pityrogramma calomelanos +
variety +
adnate +  and free +
crescent--shaped +  and roundish +