The species have been greatly confused with the Piceas and the Pines, and the reader will find the names here given sometimes under one genus sometimes under another in catalogues. To put an end to the existing confusion it would be well if growers would adopt the nomenclature in the "Report of the Conifer Conference" in Vol. XIV of the R.H.S. Journal, which has also been followed in the Practical Guide to Garden Plants. The Silver Firs most largely grown are the following, the heights given being those for fully grown trees in a native state: amabilis, 100-150 ft.; balsamea, 70-80 ft.; bracteata, 150-200 ft.; concolor, 100-130 ft., with a lovely blue-green variety, violacea; grandis, 200-300 ft.; Lowiana, 300 ft.; magnifica, 200-250 ft.; nobilis, 200-300 ft. (fig. 450), all from North America.

Abies nobilis.

Fig. 450. - Abies nobilis.

Amongst European and Asiatic species there are some very fine trees: brachyphylla, 120 ft., Japan; cephalonica, 80-100 ft., Greece; firma, 100 ft., Japan; Nordmanniana, 80-100 ft., Caucasus; pectinata, the Common Silver Fir of Central and South Europe, with many varieties; Veitchi, 120-140 ft., Japan; Webbiana, 80-90 ft., Himalayas. Most of the above are called "Picea" in nurserymen's catalogues.