Sciadopityaceae, Cupressaceae--including Taxodiaceae, Taxaceae and Cephalotaxaceae; all with the same distinctive hydrodynamic response described below (Fig.
Angio-spermous as distinct from angio-ovulate features are easily seen in conifers, most obviously in the development of fleshy seeds, as in most Podocarpaceae, Juniperus and Taxaceae, paralleling the development of fleshy fruits in Angiosperms (Table 1).
El polen de Cupressaceae/ Taxaceae
se registra en la atmosfera en un amplio periodo de tiempo que comprende de octubre a junio; los maximos se alcanzan en los meses invernales de enero y febrero coincidiendo con la floracion de la especie mas abundante (Cupressus arizonica E.
In the Taxaceae, viewed by Florin as distinct from the true conifers, the peltate microsporophyll of Taxus is considered primitive for the group and derived from a simple dichotomized branch system with terminal erect sporangia.
The female reproductive organs of the Taxaceae are not arranged in cones.
Sprengel's name is at a rank above that of family as he recognized within this taxon Pinaceae ("Pineen"), Juniperaceae ("Junipereen") and Taxaceae
("Taxeen"), all of which he termed "Ordung".
There are a few exceptions to this rule among the conifers, most notably the genera Sequoia and Cunninghamia in the Taxodiaceae and Taxus and Torreya in the Taxaceae
(Burns & Honkala, 1990; Del Tredici, 1998b).
It has been found only in the Taxaceae
and Podocarpaceae of the gymnosperms, some of which inhabit wetlands.
It is premature to regard Walchiostrobus florini as an ancestor of the Taxaceae, but we can infer divergence of this family from ancestors within the Utrechtiaceae.
Hart's (1987) cladistic analysis shows this family as a sister group with the Taxaceae in his shortest trees.
Fleshy animal-dispersed cones are present in all five species of North American Taxaceae
and all 13 species of Juniperus (Cupressaceae), but are absent in the remaining Cupressaceae (8 genera, 17 species) and in the North American Pinaceae (6 genera, 64 species) (Givnish, 1980; Adams, 1993).
The Taxaceae are a small group of gymnosperms constituting less than 2% of all gymnosperm species, with one of its genera, Taxus, a very widely cultivated ornamental shrub in the northern hemisphere.
Most taxa in the Taxaceae are rare or restricted in their distribution, although several species of Taxus are natively abundant and widely cultivated.
Some palynological observations of Taxaceae
, Cupressaceae and Araucariaceae.
The same applies to ruminate storage tissues of gymnospermous seeds, as reported for Araucariaceae (Coulter & Chamberlain, 1910), Gnetaceae (Schnarf, 1933), Phyllocladaceae (Coulter & Chamberlain, 1910), Taxaceae
(Oliver, 1902; Coulter & Land, 1905; Lotsy, 1911), and, less pronounced, Cupressaceae, Ephedraceae, and Cephalotaxaceae (Tamamshjan, 1951).