The leaves, which are in bundles of two, are from two to three inches long, very slender, grooved above and convex beneath. They remain on the tree for over two years, and in their first season are of a glaucous hue, but in the second year this changes to dark deep-green. Both male and female flowers are borne by the same tree. The male catkins are individually small (1/4 inch), but are combined in spikes; this and the abundant pale yellow pollen makes them conspicuous. The female cones are somewhat egg-shaped, tapering to a point, which is often curved. They are usually in clusters of three, and grow to a length of two or three inches. The scales are comparatively few, and their ends are thickened into an irregular four-sided boss, at first ending in a little point. The seeds are winged, and contained beneath the scales. They take about eighteen months to ripen, when the scales separate in dry windy weather, and allow the breeze to pick out the seeds and send them flying through the air to a great distance. The pollen, too, it should be noted, is of a form specially fitted for aerial transport, each particle of pollen forming two connected spheres. It is quite a common experience in May to find little heaps of this pollen collected in hollows and at the margins of ponds in the neighbourhood of Pine-woods; but, so difficult is it to get people to understand the common facts of nature, that it is generally regarded as evidence of a shower of brimstone having fallen. It is not only the ignorant rustic who falls into this error; judging from letters sent to the press by country parsons, even the universities fail to prepare their alumni to deal with such phenomena. After the eruptions of La Soufriere, several wrote to say that quantities of powdered sulphur from St. Vincent had descended in their Surrey and Hampshire parishes! their notion being that the commercial "flowers of sulphur" are the direct produce of volcanoes. [Illustration: Scots Pine.]