Genus Picea
A spruce is a tree of the genus Picea , a genus of about 35 species of coniferous evergreen trees in the Family Pinaceae, found in the northern temperate and boreal regions of the earth.Species in the genus Picea of plants
Norway spruce - Norway Spruce is a species of spruce native to Europe. It is also commonly referred to as the European Spruce.
Dragon spruce - Picea asperata is a spruce native to western China, from eastern Qinghai, southern Gansu and southwestern Shaanxi south to western Sichuan.
Brewer's spruce - It grows at moderately high altitudes, from 1000–2700 m.
Chihuahua Spruce - The bark is thin and scaly, flaking off in small circular plates 5-10 cm across. The crown is conic, with widely spaced branches with drooping branchlets. The shoots are stout, pale buff-brown, glabrous, and with prominent pulvini. The leaves are needle-like, 17-23 mm long, stout, rhombic in cross-section, bright glaucous blue-green with conspicuous lines of stomata; the tip is viciously sharp.
Engelmann spruce - Picea engelmannii is a medium-sized to large evergreen tree growing to 25-40 m tall, exceptionally to 65 m tall, and with a trunk diameter of up to 1.5 m. The bark is thin and scaly, flaking off in small circular plates 5-10 cm across. The crown is narrow conic in young trees, becoming cylindric in older trees. The shoots are buff-brown to orange-brown, usually densely pubescent, and with prominent pulvini. The leaves are needle-like, 15-30 mm long, rhombic in cross-section, glaucous blue-green above with several thin lines of stomata, and blue-white below with two broad bands of stomata.
Farrer's spruce - Picea farreri is named after the plant collector Reginald Farrer who travelled extensively in China and what was then Burma.
White spruce - The white spruce is a large evergreen tree which grows normally to 15 to 30 metres tall, but can grow up to 40 metres tall with a trunk diameter of up to 1 metre . The bark is thin and scaly, flaking off in small circular plates 5 to 10 centimetres across. The crown is narrow conic in young trees, becoming cylindric in older trees. The shoots are pale buff-brown, glabrous in the east of the range, but often pubescent in the west, and with prominent pulvini. The leaves are needle-like, 12 to 20 millimetres long, rhombic in cross-section, glaucous blue-green above with several thin lines of stomata, and blue-white below with two broad bands of stomata.
Sakhalin spruce - Picea glehnii
Picea jezoensis - The bark is thin and scaly, becoming fissured in old trees. The crown is broad conic. The shoots are pale buff-brown, glabrous but with prominent pulvini. The leaves are needle-like, 15-20 mm long, 2 mm broad, flattened in cross-section, dark green above with no stomata, and blue-white to white below with two dense bands of stomata.
Korean Spruce - It is a medium-sized evergreen tree growing to 30 m tall, and with a trunk diameter of up to 0.8 m. The shoots are orange-brown, glabrous or with scattered pubescence. The leaves are needle-like, 12-22 mm long, rhombic in cross-section, dark bluish-green with conspicuous stomatal lines. The cones are cylindric-conic, 4-8 cm long and 2 cm broad, maturing pale brown 5-7 months after pollination, and have stiff, smoothly rounded scales.
Koyama's Spruce - It is a monoecious evergreen tree growing to 25 m tall, with a trunk diameter of up to 1 m. The shoots are orange-brown, with scattered pubescence. The leaves are needle-like, 8-16 mm long, rhombic in cross-section, dark bluish-green with conspicuous stomatal lines. The cones are cylindric-conic, 4-9 cm long and 2 cm broad, maturing pale brown 5–7 months after pollination, and have stiff, smoothly rounded scales 6–18 mm long and 6-12 mm wide. Pollination takes place in late spring.
Black spruce - Picea mariana is a slow-growing, small upright evergreen coniferous tree (rarely a shrub, having a straight trunk with little taper, a scruffy habit, and a narrow, pointed crown of short, compact, drooping branches with upturned tips. Through much of its range it averages 5–15 m tall with a trunk 15-50 cm diameter at maturity, though occasional specimens can reach 30 m tall and 60 cm diameter. The bark is thin, scaly, and grayish brown. The leaves are needle-like, 6-15 mm long, stiff, four-sided, dark bluish green on the upper sides, paler glaucous green below. The cones are the smallest of all of the spruces, 1.5-4 cm long and 1–2 cm broad, spindle-shaped to nearly round, dark purple ripening red-brown, produced in dense clusters in the upper crown, opening at maturity but persisting for several years.
Martinez's Spruce - The bark is thin and scaly, flaking off in small circular plates 5-10 cm across. The crown is conic, with widely spaced branches with drooping branchlets. The shoots are stout, pale buff-brown, glabrous, and with prominent pulvini. The leaves are needle-like, 23-35 mm long, stout, moderately flattened in cross-section, bright glossy green with inconspicuous lines of stomata; the tip is viciously sharp.
Meyer's Spruce - It is a medium-sized evergreen tree growing to 30 m tall, and with a trunk diameter of up to 0.8 m. The shoots are yellowish-brown, glabrous or with scattered pubescence. The leaves are needle-like, 13-25 mm long, rhombic in cross-section, bluish-green with conspicuous stomatal lines. The cones are cylindric, 7-11 cm long and 3 cm broad, maturing pale brown 5-7 months after pollination, and have stiff, smoothly rounded scales.
Veitch's Spruce - Picea neoveitchii is an endemic pine species of central China. Several scattered communities and individuals can be found growing on the south slope of Qinling Mountain in Baotian Man Nature Preserve, Henan province between 1240 and 2020 meters elevation. This pine species is especially vulnerable to extinction due to the high fragmentation of its natural habitat from human disturbance. Current conservation efforts are focused on preserving natural habitats, managing invasive species to reduce competition, and prohibiting timber harvest. Conservation researchers emphasize the urgent need for a restoration project which reintroduces seedlings across the tree's original range , and protects wild communities and individuals .
Siberian spruce - Siberian Spruce is a spruce native to Siberia, from the Ural Mountains east to Magadan Oblast, and from the arctic tree line south to the Altay Mountains in northwestern Mongolia.
Serbian spruce - It is a medium-sized evergreen tree growing to 20–35 m tall, exceptionally to 40 m tall, and with a trunk diameter of up to 1 m. The shoots are buff-brown, and densely pubescent . The leaves are needle-like, 10–20 mm long, flattened in cross-section, and dark blue-green above, and blue-white below. The cones are 4–7 cm long, fusiform , dark purple when young, maturing dark brown 5–7 months after pollination, and have stiff scales.
Caucasian spruce - The shoots are buff-brown, and moderately pubescent . The leaves are needle-like, the shortest of any spruce, 6-8 mm long, rhombic in cross-section, dark green with inconspicuous stomatal lines. The cones are slender cylindric-conic, 5-9 cm long and 1.5 cm broad, red to purple when young, maturing dark brown 5–7 months after pollination, and have stiff, smoothly rounded scales.
Blue spruce - Blue spruce is a medium-sized evergreen tree growing to 25–30 m tall, exceptionally to 46 m tall, and with a trunk diameter of up to 1.5 m . The bark is thin and gray, with narrow vertical furrows. The crown is conic in young trees, becoming cylindric in older trees. The shoots are stout, orange-brown, usually glabrous, and with prominent pulvini.
Schrenk's Spruce - Picea schrenkiana is a large evergreen tree growing to 40–50 metres tall ), with a trunk diameter of up to 1–2 metres . It has a narrow conical crown with level branches and sometimes pendulous branchlets. The shoots are pale buff-brown, and glabrous . The leaves are needle-like, 1.5-3.5 cm long, rhombic in cross-section, dark green with inconspicuous stomatal lines.
Picea sitchensis - The bark is thin and scaly, flaking off in small circular plates 5–20 cm across. The crown is broad conic in young trees, becoming cylindric in older trees; old trees may have no branches in the lowest 30–40 m. The shoots are very pale buff-brown, almost white, and glabrous but with prominent pulvini. The leaves are stiff, sharp and needle-like, 15–25 mm long, flattened in cross-section, dark glaucous blue-green above with two or three thin lines of stomata, and blue-white below with two dense bands of stomata.
Morinda spruce - Picea smithiana is a large evergreen tree growing to 40-55 m tall , and with a trunk diameter of up to 1-2 m. It has a conical crown with level branches and usually pendulous branchlets.
Sikkim spruce - It is a large evergreen tree growing to 40-55 m tall , and with a trunk diameter of up to 1-2.5 m. It has a conical crown with level branches and usually pendulous branchlets.