The rocky islands are barren, except for scrubby yews and junipers and thin volcanic soil. Below 2400 masl, there are small areas with junipers, cedars, and meadows. The north contains forests of pine, ocote, oaks, junipers and other trees. It can also be found among pines and junipers. A juniper berry is the female seed cone produced by the various species of junipers. Herbaceous cover decreases, and junipers are often mistaken for weeds. The foliage is prickly, typical of many junipers. Cedar waxwings are fond of the "berries" of these junipers. The road then climbs into a belt of Joshua trees and California junipers. Another major problem is the loss of trees, especially junipers in the ecological zone. These are to be replaced by native species, especially junipers in the chinampa areas. Provisionally, all the other junipers are included here, though they form a paraphyletic group. David Belasco came to plant two junipers. The shoots are fairly thick compared to most junipers, between in diameter. Some of the older junipers are very large.