Monographs Details:
Authority:
Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.
Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.
Family:
Dennstaedtiaceae
Dennstaedtiaceae
Description:
Species Description - Rhizome 0.8-1.5 cm in diam., densely clothed toward apex with a woolly mass of dark reddish brown, slender, articulate hairs mostly 5-8 mm long. Fronds to 3 m long; stipes yellowish to dark brown (or dark at base only), grooved adaxially, at base clothed with hairs like those of rhizome, glabrous or sparsely pubescent distally. Blades broadly ovate, 3-pinnate-pinnatifid or nearly 4-pinnate, sparsely and minutely pubescent throughout, more especially on abaxial side, or else nearly glabrous; rhachis deeply grooved adaxially, often marked with minute reddish dots (rarely raised points) where hairs have fallen; pinnae 15-25 pairs, stalked, somewhat ascending, nearly equilateral, the second pair from base of blade the longest; tertiary divisions deltate-oblong or deltate-lanceolate, sessile or short-stalked, obtuse to acutish, lobed to deeply pinnatifid, when fertile bearing a sorus near the base of each sinus; ultimate segments or lobes obtusely toothed; veins subdichotomously branched, channelled on adaxial side, prominulous beneath, with enlarged tips not reaching the margins; tissue thin to firm-herbaceous, not lustrous. Sori 1-1.5 mm in diam., the indusial cup half-globose.
Species Description - Rhizome 0.8-1.5 cm in diam., densely clothed toward apex with a woolly mass of dark reddish brown, slender, articulate hairs mostly 5-8 mm long. Fronds to 3 m long; stipes yellowish to dark brown (or dark at base only), grooved adaxially, at base clothed with hairs like those of rhizome, glabrous or sparsely pubescent distally. Blades broadly ovate, 3-pinnate-pinnatifid or nearly 4-pinnate, sparsely and minutely pubescent throughout, more especially on abaxial side, or else nearly glabrous; rhachis deeply grooved adaxially, often marked with minute reddish dots (rarely raised points) where hairs have fallen; pinnae 15-25 pairs, stalked, somewhat ascending, nearly equilateral, the second pair from base of blade the longest; tertiary divisions deltate-oblong or deltate-lanceolate, sessile or short-stalked, obtuse to acutish, lobed to deeply pinnatifid, when fertile bearing a sorus near the base of each sinus; ultimate segments or lobes obtusely toothed; veins subdichotomously branched, channelled on adaxial side, prominulous beneath, with enlarged tips not reaching the margins; tissue thin to firm-herbaceous, not lustrous. Sori 1-1.5 mm in diam., the indusial cup half-globose.
Discussion:
Basionym. Polypodium globuliferum Poiret, in Lamarck, Encycl. 5: 554. 1804.
Type. Plumier, Traite foug. Amer., t. 30, based on a plant from Hispaniola.
Syn. Dicksonia altissima J. E. Smith in Rees, Cycl. 1808. (Based on Polypodium globuliferum Poiret.) Dicksonia exaltata Kunze, Bot. Zeitung (Berlin) 8: 59. 1850. (Type. Funk & Schlim 1224, from Venezuela, LZ, destroyed; isotype L, photo US.)
Dicksonia globulifera (Poiret) Kuntze, Revis. gen, pl. 3(2): 378. 1898,
Dicksonia dissecta of Jenman, Fems Brit. W . Ind, 63. 1899, in part, not Swartz, 1802.
Dennstaedtia exaltata (Kunze) Hieronymus, Bot. Jahrb. Syst. 34: 454, 1904.
Distribution:
Mexico North America| Central America| Venezuela South America| Colombia South America| Ecuador South America| Peru South America| Bolivia South America| Chile South America| Argentina South America| Paraguay South America| Brazil South America|
Mexico North America| Central America| Venezuela South America| Colombia South America| Ecuador South America| Peru South America| Bolivia South America| Chile South America| Argentina South America| Paraguay South America| Brazil South America|