|Young Siberian spruce trees, Khanty–Mansi Autonomous Okrug (Russia)|
Description and uses
It is a medium-sized evergreen tree growing to 15–35 m tall, and with a trunk diameter of up to 1.5 m, and a conical crown with drooping branchlets. The shoots are orange-brown, with variably scattered to dense pubescence. The leaves are needle-like, 1–2 cm long, rhombic in cross-section, shiny green to grayish-green with inconspicuous stomatal lines; the leaves subtending a bud are distinctively angled out at a greater angle than the rest of the leaves (a character shared by only two or three other spruces). The cones are cylindric-conic, 5–10 cm long and 1.5–2 cm broad, green or purple, maturing glossy brown 4–6 months after pollination, and have stiff, smoothly rounded scales.
Taxonomy and systematics
Siberian spruce hybridises extensively with Norway spruce where the two species (or subspecies) meet in northeastern Europe; trees over a broad area from extreme northeast Norway and northern Finland east to the Ural Mountains are classified as the hybrid Picea × fennica (Regel) Komarov (or P. abies subsp. ×fennica, if the two taxa are considered subspecies); they differ from typical P. obovata from east of the Urals in having cones with less smoothly rounded, often triangular-pointed, scales.
- A. Farjon (2013). "Picea obovata". The IUCN Red List of Threatened Species. IUCN. 2013: e.T42331A2973177. doi:10.2305/IUCN.UK.2013-1.RLTS.T42331A2973177.en. Retrieved 15 January 2018.
- Christopher J. Earle. "Picea obovata Ledeb. 1833". Gymnosperm Database. Retrieved 10 December 2014.
- Konstantin V. Krutovskii & Fritz Bergmann (1995). "Introgressive hybridization and phylogenetic relationships between Norway, Picea abies (L.) Karst., and Siberian, P. obovata Ledeb., spruce species studied by isozyme loci". Heredity. 74 (5): 464–480. doi:10.1038/hdy.1995.67.