260 PSEUDOTSUGA PTELEA 



a stature of over 100 ft. But in its adaptability to the various soils and 

 climates available for forestry it is far inferior to either of the other 

 two. To get it at its best it requires a climate where the rainfall is 

 abundant, and at least a moderately good soil. On dry, hungry soil, and 

 in bleak spots, it is a failure. To see this tree in its finest condition 

 and in its greatest numbers one must visit the Perthshire properties 

 especially those of Murthly and Taymount. Solitary trees are magnificent, 

 the enormous trunks supporting a mass of large plume-like branches. 



P. MACROCARPA, Mayr^ is a close ally of the Douglas fir, but according to 

 Jepson is only from 30 to 90 ft. high. It differs from P. Douglasii in its 

 leaves being incurved instead of straight, and taper-pointed instead of 

 usually rounded at the apex. Cones larger, occasionally 6^ to 7^ ins. long, 

 with the bracts not protruded so much beyond the scales. Native of S. 

 California and lower California. 



P. JAPONICA, Sargent (Abies japonica, Rovellij Gardeners' Chronicle, 

 1909, i., fig. 132). A tree up to 100 ft. high in Japan, but only known in this 

 country by a few small plants. The young shoots appear to be always 

 without down, and the leaves, except on quite young plants, to be notched at 

 the apex ; both these characters afford good distinctions between this and 

 the West American species. The leaves are f to ij ins. long, and have two 

 broad stomatic strips beneath. Cones only i^ to i| ins. long, i in. wide. 

 This tree was discovered in 1893 by the Japanese botanist Shirasawa, and is 

 a native of the provinces of Yamato and Kii ; first introduced to the botanic 

 garden at Hamburg, and to Ansorge's nursery at Flottbeck. Mr Ansorge in 

 1907 sent me some twigs taken off young plants, the leaves of which were 

 rounded at the apex. This is characteristic of young plants only. Older 

 ones exhibited at the British-Japanese Exhibition of 1910 had decidedly 

 notched leaves. 



PTELEA TRIFOLIATA, Linnceus. HOP TREE. RUTACE^E. 



A low deciduous tree, usually under 20 ft. high, often of greater 

 breadth than height, with' a short, comparatively thick trunk, often 

 inclined. Leaves trifoliolate, the leaflets lanceolate, ovate or oblong, 

 finely toothed or entire, downy beneath when young, the middle one the 

 largest, and from 2 to 6 ins. long, with a short stalk, the lateral leaflets 

 unequal-sided, stalkless ; the common leaf-stalk is 2 to 4 ins. long. Held 

 against the light and seen through a lens the blade is found to be dotted 

 with oil-glands. Flowers borne on slender, downy stalks in corymbs 

 2 or 3 ins. across during June and July, dull greenish white, \ to \ in. 

 across. They are unisexual, the males soon falling away. Fruit in dense 

 clusters, each" a flat, thin disk from to i in. across, consisting of an 

 almost circular wing, with prominent netted veins surrounding one seed 

 in the centre. Occasionally the fruit has more than one wing. 



Var. AUREA. Leaves yellow. 



Var. FASTIGIATA. Branches erect. 



Var. GLAUCA. Leaves blue-green instead of the ordinary rich dark 

 green. 



Var. HETEROPHYLLA. Leaves mostly trifoliolate as in the type, but 

 others have four, some five leaflets ; they are also narrower in proportion 

 to their length. 



