Pinus luzmariae
Pinus luzmariae is a coniferous tree from the species of pines ( Pinus ), usually with a threesome growing needles. The species resembles Pinus oocarpa, who is often attributed. In the IUCN Red List, they will be listed as endangered.
Description
Pinus luzmariae grows as evergreen, 10 to 15 meter high tree. The strain reached breast height diameter of 40 to 60 centimeters. The needles grow in threes and rarely fourth in a needle sheath. You are stiff, rarely from 11, mostly 14 to 17 and sometimes up to 20 centimeters long and 1.2 to 1.6 millimeters wide. The seeds are open pin 3 to 5.5 inches long with a diameter of 3 to 5, often up to 6 cm.
Distribution and ecology
The natural range of Pinus luzmariae located in Mexico and Honduras. The largest holdings are in the southern Sierra Madre Occidental in the state of Durango with about 1000 hectares and another in the north of Jalisco with 600 acres. In both areas there are open forests on rocky ground. Climatic conditions and associated tree types are similar to those of Pinus oocarpa. The climate in the area of distribution is moderate to mild, sometimes with tropical influence. On stony ground finds Pinus luzmariae together with Pinus and Pinus engelmannii lumholtzii and various oak species such as Quercus magnoliifolia, Quercus resinosa, Quercus crassifolia and Quercus coccolobifolia. On more profound soils it grows along with the oaks Quercus and Quercus viminea fulva and the strawberry tree Arbutus tessellata.
Threats and conservation
In the IUCN Red List Pinus luzmariae be listed as endangered ( "Least Concern" ). The type may be only about one to five, endangered due to the low rate of reproduction by the small number of fertile seeds per cone. One reason could be the output of the pollen in June and July to be when the frequent rains make the pollination difficult. Other dangers are posed by fire and illegal logging of trees dar.
Systematics and etymology
Pinus luzmariae is a species in the genus of pine (Pinus ), in which it is assigned to the subgenus Pinus, section Trifoliae, subsection Austral. The taxon was first described in 1945 by Maximino Martínez Pinus oocarpa f trifoliata, and therefore only classified as a form of Pinus oocarpa. He put it in 1948 as a variety Pinus oocarpa also trifoliata var to Pinus oocarpa. Jorge Pérez de la Rosa also managed other distinctive features to Pinus oocarpa as the number of needles to work out each needle sheath and described the taxon in 1998 as a separate species Pinus luzmariae. The specific epithet luzmariae reminiscent of Pérez de la Rosa's village school teacher Luz Maria Villa Real de Puga. Against the classification as a separate species speaks the scattered occurrence of the taxon in a large part of Mexico and outside of Mexico in areas where Pinus oocarpa also occurs. For a final assessment, however, are missing, for example, genetic studies. Some authors said James E. Eckenwalder not recognize the taxon as a separate taxon to, but see the name Pinus oocarpa trifoliata var only as a synonym for Pinus oocarpa.
Use
There is no information on the use of the species, but it is likely to be used in a similar way as Pinus oocarpa.