6. =Àbies Píchta=, Fisch. (SIBERIAN SILVER FIR.) Leaves 1 in. long, linear, flat, obtuse, incurved at the apex, mostly scattered, very dark green above, paler beneath. Cones 3 in. long, ovate, cylindric, obtuse, with rounded, entire scales and hidden bracts. A small to medium-sized cultivated tree, 25 to 50 ft. high, with horizontal, somewhat pendulous branches and dense compact growth. It is peculiar in its very dark foliage; very hardy. [Illustration: A. Cephalónica.] 7. =Àbies Cephalónica=, Loud. (CEPHALONIAN SILVER FIR.) Leaves ¾ in. long, very stiff, sharp-pointed, spreading broadly from the branches in all directions, dark green above and white beneath; petioles very short, dilated lengthwise at the point of attachment of the branches. Cones very erect, 4 to 6 in. long, 1-1/3 in. in diameter; projecting scales unequally toothed and reflexed at the point. A beautiful, cultivated tree, 30 to 60 ft. high, with bright brown bark and resinous buds. [Illustration: A. Pinsàpo.] 8. =Àbies Pinsàpo=, Bois. (PINSAPO FIR.) Leaves less than 1 in. long (usually ½ in.), rigid, straight, scattered regularly around the branches, and pointing in all directions; disk-like bases large; branches in whorls, and branchlets very numerous. Cones 4 to 5 in. long, oval, sessile; scales rounded, broad, entire; bracts short. A very handsome tree from Spain, and reported hardy at the Arnold Arboretum. [Illustration: A. cóncolor.] 9. =Àbies cóncolor=, Lindl. (WHITE FIR.) Leaves 2 to 3 in. long, mostly obtuse, but on young trees often long-pointed, 2-ranked, not crowded on the stem, pale green or silvery. Cones oblong-cylindric, 3 to 5 in. long, 1½ in. in diameter; scales twice as broad as long; bracts short, not projecting. A large tree, 75 to 150 ft. high; bark rough, grayish. Native in the Rocky Mountains; hardy at the Arnold Arboretum, Massachusetts, but needs some protection at St. Louis. [Illustration: A. Cilícica.] 10. =Àbies Cilícica=, Carr. (CILICIAN SILVER FIR.) Leaves flat, linear, 1 to 1¾ in. long and 1/12 in. broad, somewhat 2-ranked but rather irregularly scattered around the young shoots; shining dark green above and whitish beneath. Cones 7 to 8 in. long, nearly 2 in. in diameter, cylindric, obtuse, erect, with thin and entire scales, and short and hidden bracts. A very conical tree, 50 ft. high, with branches in whorls, and numerous, small, slender branchlets. Bark light gray; recently cultivated from Asia. [Illustration: A. nóbilis.]