Gymnosperms; structure and evolution, by Charles Joseph Chamberlain ... with 397 figures.

Genetic diversity through life history of Dioon edule Lindley (Zamiaceae, Cycadales)

“…At RN, a total population of 471 plants was recorded in an area of 2400 m 2 (85 adults, 143 juveniles and 243 seedlings), with a density of 0.44 individuals per meter square distributed continuously (Octavio-Aguilar et al 2008). This population, now reduced to a small area of riparian vegetation, is a relict of a much wider distribution described by Chamberlain (1935), becoming greatly reduced during the 20th century and especially over the last few decades (A. P. Vovides, personal observation). Finally, at the EF population site, in a sample area of 4800 m 2 , 468 plants were counted (138 adults, 93 juveniles and 237 seedlings) with a density of 0.31 individuals per meter square with a disjunct distribution, e.g.…”

Ultrastructure, cytochemical, and histochemical studies on pollen and male gamete development in gymnosperms

“…Bicelled pollen grains are formed in Biota [Martin, 1950;Singh and Oberoi, 1962;Moitra, 19801, Chamaecyparis [Coker, 1904;Lawson, 1907b;Kuhlwein, 1937;Sugihara, 19381, Libocedrus [Lawson, 1907b1, Thuja [Land, 1902Knischewsky, 1905;Cook, 19391, and Thujopsis [Sugihara, 19391. Araucariaceae. Members of the family Araucariaceae show 6-1 0 (in Agathis) and 13-40 (in Araucaria) prothallial cells [Lopriore, 1905;Thomson, 1907;NicolosiRoncati, 1907;Jeffrey and Chrysler, 1907;Burlingame, 1913;Eames, 1913;Ghose, 1924;Chamberlain, 1935;Hodcent, 1968;Kaur, 19791. The two male gametes may be equal [Burlingame, 1915;Ghose, 1924;Kaur, 19791 or unequal [Burlingame, 1913;Eames, 19131. Podocarpaceae.…”

“…The ciliate sperms are formed in cycads and Ginkgo [Chamberlain, 1935;Swamy, 1948;Favre-Duchartre, 1956;Rao, 1961;DeSloover-Colinet, 1963;Pant, 1973;Norstog, 1975Norstog, , 1977Gifford and Lin, 19751. Motile sperms were reported in Pseudotsuga [Christiansen, 1969a,b] and Larix [Christiansen, 19721.…”

Welwitschia mirabilis (Welwitschiaceae), male cone characters and a new subspecies

“…In pub-lications of J. D. Hooker (1862Hooker ( , 1863, W. J. Hooker (1863), Groenland (1863), McNab (1873), Dinter (1898), Anonymous (1898), Baum (1903), Sykes (1910), Takeda (1913), Markgraf (1926), Pearson (1929), Chamberlain (1934), Herre (1948Herre ( , 1954, Hall (1950), Rodin (1953aRodin ( -b, 1963), Jensen (1957), Martens (1961Martens ( , 1971, Whellan (1965), Friedrich-Holzhammer & Roessler (1966), Verdoorn (1966), Kers (1967), Giess (1969), Benson (1970a-b), Horwood (1974), Zecher (1974), Martens (1977), Bornman (1977Bornman ( , 1978, Tijmens (1978), Eller & al. (1983), Willert (1985Willert ( , 1993Willert ( , 1994, Brinckmann & Willert (1987), Kedves (1987), Van Jaarsveld (1990, Kubitzki (1990), Leute & Wetschnig (1990), Kärnefelt (1994), Wetschnig (1997), Steyn & Smith (1999), Lombardi (2000), …”