Showing papers on "Lygodium published in 1965"
TL;DR: Chromosome counts have been carried out on thirteen specimens of Lygodium, mostly of known wild origin from various parts of the oriental tropics, mostly from Iran as mentioned in this paper.
Abstract: Summary
Chromosome counts have been carried out on thirteen specimens of Lygodium, mostly of known wild origin from various parts of the oriental tropics. Five specimens represent taxa not previously investigated from any source. The results confirm some previous records, notably the presence in the genus of two base numbers (n = 29 and n = 30) and their multiples, but they add a new base number (n = 28) and multiples. Some phyletic and other implications of these findings are discussed.
26 citations
TL;DR: Two species of subtriangular, trilete spores assigned to a new form genus, Acritosporites, occur in Cenomanian and Turonian sandstones and silty clays of central U.S. as mentioned in this paper.
Abstract: Two species of subtriangular, trilete spores assigned to a new form genus, Acritosporites, occur in Cenomanian and Turonian sandstones and silty clays of central U. S. S. R. Three proximal, interradial, oval "lacunae" and one distal, circular "lacuna" characterize the genus. The author, in disagreement with Bolkhovitina, prefers not to ally A. sibiricus (Bolkh.) comb. nov. with Lygodium. — D. C. McGregor.