PICEA 



SPRUCE-FIRS 



Picea, Link, Abhandl. Akad. IViss. Berlin, 1827, 179 (1830); Benthatn et Hooker, Gen. PL iii. 439 



(1880); Masters, y(9n Linn. Soc. {Boi.) xxx. 28 (1893). 

 Abies, Linnaeus, Gen. PI. 294 (in part) (1737); D. Don in Lambert, Pinus, vol. iii. (1837), ex 



Loudon, Arb. et Frut. iv. 2293 (1838). 



This genus includes the spruce-firs, which in England, following the practice of 

 Don and Loudon, are still often called Abies. However, all botanists in England, 

 on the Continent, and in America apply the term Picea to the spruces, and Abies to 

 the silver firs. 



Tall evergreen trees belonging to the tribe Abietinese of the order Coniferse, 

 with shoots of only one kind, bearing in spiral order peg-like projections (" pulvini "), 

 from which the leaves arise singly. The needle-like leaves are either tetragonal or 

 flattened in section, and persist for many years, rendering the foliage very dense. 

 At the ends of the leading shoots there is a terminal bud, with 2-5 side buds directly 

 under it ; the buds are dry and not resinous. 



Flowers monoecious. Male flowers solitary in the axils of the uppermost leaves, 

 ovoid or cylindric, short-stalked, surrounded at the base with scale-like bracts, com- 

 posed of numerous stamens spirally arranged, each with 2 pollen-sacs opening longi- 

 tudinally, and a connective prolonged into a toothed crest. Pollen grains with 2 

 air-sacs. Female flowers solitary, terminal, erect, stalked, with a few empty scales 

 at the base ; composed of 2 series of scales, the bracts small and membranous, and 

 the ovular scales bearing at their base 2 inverted ovules. Cones : generally 

 becoming pendulous, but in certain species remaining erect or spreading ; cylindrical 

 or ovoid, with the bracts minute and concealed, and the scales enlarged and firm in 

 texture, with entire or denticulate margins, and bearing on their inner surface 2 

 winged seeds. The cones are ripe in the first season, and after dispersal of the seed 

 (the scales persisting on the axis) fall off in the following winter, or remain in some 

 species much longer on the tree. The cotyledons are 5-15 in number, 3-sided, and 

 serrate in margin. 



Species of spruce occur in Europe, Asia Minor, the Caucasus, Siberia, Mongolia, 

 China, Japan, the Himalayas, and in North America. The genus is marked out into 

 two natural sections by the character of the leaves. These are defined by Willkomm 

 as follows ; 



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