PINUS 191 



in threes, mostly falling the third year, 8 to 12 ins. long, of a pale greyish 

 green, with two narrow flat faces, and one rounded broad one, all lined closely 

 with stomata ; extremely minutely toothed at the margin, slenderly and 

 sharply pointed ; leaf-sheath f to I in. long, persistent. Cones produced on 

 stout stalks about 2 ins. long, ovoid, 6 to ip ins. long, 4 to 6 ins. thick, often 

 remaining on the branch long after the seeds have fallen ; scales terminated 

 by a large, triangular, hooked spine. 



Native of California, whence it was introduced by Douglas in 1832. Most 

 nearly allied to P. Coulteri, and with similar large, heavy, spiny cones, it is 

 very readily distinguished by its thin foliage, smoother and more slender 

 young shoots, and narrow cylindrical winter buds. The young shoots when 

 cut have the same orange-like odour as in Coulteri, ponderosa, and Jeffreyi. 

 The seeds are large like those of P. Coulteri (but with much snorter wings), 

 and were formerly much eaten by the Digger tribe of Indians. It is not 

 a particularly ornamental tree, being thinly furnished with foliage, but is 

 interesting in the curious contrast between the heavy trunk and the thin, 

 light, shadeless head of branches. 



P. STROBUS, Lmnceus. WEYMOUTH PINE. 



A tree usually 60 to 80, rarely above 100 ft. high in this country, but known 

 occasionally to have exceeded twice that height in the United States ; bark 

 of trunk shallowly fissured. Young shoots with a tuft of down extending 

 downwards from each leaf-bundle, much of which soon falls away ; winter 

 buds ovoid, with closely flattened scales. Leaves in fives, mostly falling the 

 third year, 3 to 5 ins. long, roughened on the margins, soft bluish green, with 

 lines of white stomata on the inner sides ; leaf-sheath about ^ in. long, soon 

 falling completely away. Cones 5 to 8 ins. long, about I in. diameter before 

 opening, cylindrical, tapering at the apex, curved ; scales of cones thin, 

 smooth, rounded, I to ij ins. long, half as wide. 



Native of Eastern N. America ; introduced in 1705. The common name of 

 " Weymouth " pine does not refer to the town, but to a Lord Weymouth, who 

 is recorded to have planted it largely at Longleat about two hundred years 

 ago. In France, the name has been contracted to " Pin du Lord." This pine 

 has at various times been largely planted both in England and on the Continent, 

 and is, no doubt, a valuable timber tree, especially in sunnier climates than 

 ours, producing a white, easily worked, light timber, very useful for many 

 purposes, but not remarkable for strength. One hundred years ago this tree 

 covered enormous areas in Eastern N. America, and was one of the richest 

 assets of the country. Now fine specimens are comparatively scarce there. 

 It is an ornamental tree for gardens where the soil is not a heavy clay, 

 especially up to its middle age, though its value is impaired through its being 

 frequently infested on the lower side of the branches by a white chermes, 

 very similar to the beech coccus in appearance. It is only likely to be 

 confused with P. monticola, which differs in having young shoots wholly 

 covered with down, thicker leaves, and cones of greater average length. 



Var. NANA, Knight. A dwarf form of dense, compact habit, and leaves less 

 than half as long as the type. The forms known as COMPACTA, DENSA, and 

 UMBRACULIFERA are of the same character. 



Var. PROSTRATA is an absolutely prostrate form introduced from the 

 United States about 1893. A plant in the rock garden at Kew hangs verti- 

 cally over the face of a stone. Raised in the Arnold Arboretum. 



P. SYLVESTRIS, LinnctUS. SCOTCH PlNE. 



A tree rarely more than 100 to no ft. high, with a trunk 3 ft., sometimes 

 5 ft. in thickness. The trunk has a beautiful red tinge, and is smooth, 



