Picea Rubens commonly known as Spruce is an evergreen conifers tree of the genus Picea and in the family Pinaceae. The plant is native to eastern North America, ranging from eastern Quebec to Nova Scotia, and from New England south in the Adirondack Mountains and Appalachians to western North Carolina.  Few of the popular common names of the plant are yellow spruce, West Virginia spruce, eastern spruce, he-balsam, red spruce and blue spruce. Genus name is reportedly derived from the Latin word pix meaning pitch in reference to the sticky resin typically found in spruce bark. Specific epithet both are in reference to the fact that mature needles of this tree become glaucous (acquire a waxy white bloom) with age. Spruce is long-lived, often achieving ages greater than 350 years.

Plant Description

Spruce is a perennial, shade-tolerant, late successional, coniferous tree that grows about 18–40 meters (59–131 ft.) tall with a trunk diameter of about 60 centimeters (24 in), though exceptional specimens can reach 46 m (151 ft.) tall and 30 cm (12 in) diameter. The plant is found growing in moist but well-drained sandy loam, often at high altitudes. The tree is upright and straight, with a narrow crown. Root system has a minimum depth of 13 inches (33 centimeters). Twigs are orangish brown, finely hairy (may need a hand lens); as with all spruces, needleless twigs covered by short sterigmata (short pegs).  Buds are orange-brown, small with loose scales, with a densely pubescent to glabrous texture.

Barks are grayish brown on surface, more reddish brown beneath with irregular, fine flaky patches, thin, and scaly. Woods are light, soft, have narrow rings, and have a slight red tinge. Leaves are needle-like, yellow-green, 12–15 millimeters (0.47–0.59 in) long, four-sided, curved, with a sharp point, and extend from all sides of the twig. Needles are pungently aromatic when crushed. Foliar buds are reddish brown in color, measuring 0.2 to 0.32 inch (5 – 8 mm), with an acute apex. Species is monoecious; males are cylindrical reddish but turning yellow-brown; females are purplish green. Flowers are followed by chestnut brown ovoid cone, 1 to 1 1/2 inches long, cone scale margins entire. Seed is dispersed in the fall and cones tend to drop their first winter.

Types of Spruce

Few of the types of Spruce is mentioned below

1. Black Spruce

Black Spruce is an extremely hardy evergreen tree with a very narrow growth habit and bluish-green foliage. The plant tolerates wet sites.

2. Colorado Spruce

Colorado Spruce is often present in landscapes in the form of one of its cultivars with bluish foliage. The tree does not deserve its popularity. It becomes a very tall, blue tower, decorated with galls at the branch tips as canker diseases disfigure the tree at an early age. The tree should be enjoyed while young but should not be considered permanent.

3. Colorado blue spruce

The needle-like evergreen foliage of the Colorado blue spruce has a very stiff appearance. Its foliage color varies from blue-green to silver. Suggested uses for this plant include windbreak, screen, border, and specimen plant.

4. Norway spruce

The plant has short, needle-like, evergreen foliage that is dark green. Pendulous cones are 4 to 6 inches long, but do not occur consistently from year-to-year. Suggested uses for this plant include windbreak, screen, border, and specimen plant.

5. Serbian Spruce

Serbian Spruce forms a narrow, pyramidal silhouette with graceful arching branches. The upper surface of the needles is glossy, dark green in contrast to the whitish lower surface.

6. Sitka Spruce

Native to northwest North America, the Sitka Spruce is the largest of the spruce family. It is said to have a lifespan of over 500 years. Its needles are very sharp and stiff and it has particularly long branches growing from well down on the trunk. Branches have a pronounced upward sweep at the end.

7. White Spruce

White Spruce is a densely, pyramidal spire with bluish-green needles. The tree is widely used for its site adaptability.

Traditional uses and benefits of Spruce

• Spruce needles and resins are useful in medicinal teas and salves.
• Tea made from the boughs has been used in the treatment of colds and to ‘break out’ measles.
• The pitch from the trunk has been used as a poultice on rheumatic joints, the chest and the stomach in order to relieve congestion and pain.
• Decoction of the bark has been used in the treatment of lung complaints and throat problems.
• Needles rich in vitamin C and are used in an aromatic steam inhalation, they can clear stuffy sinus congestion from winter colds.
• Spruce resin is a useful first aid remedy to use in the field to cover scrapes and cuts.
• Resin is used to cover canker sores in the mouth.
• Spruce salve is helpful to prevent skin chafing and windburn.
• Spruce resin contains aromatic oils that are helpful in healing wounds.

Culinary Uses

• Leafy red spruce twigs are boiled as a part of making spruce beer.
• It can also be made into spruce pudding.
• Young shoots are an emergency food, used when all else fails.
• Young male catkins are consumed raw or cooked. It is used as a flavoring.
• Immature female cones are cooked and consumed.
• The central portion, when roasted, is sweet and syrupy.
• Inner bark is dried, ground into a powder and then used as a thickener in soups etc. or added to cereals when making bread.
• Refreshing tea, rich in vitamin C, can be made from the young shoot tips.
• Gum exuded from the tree as a result of injury to the sapwood is used for making chewing gum.

Other facts

• Wood is used for making paper, for construction lumber, and for musical stringed instruments.
• Spruce gum was formerly collected and processed for chewing gum.
• Spruce is used for Christmas trees and is an important wood used in making paper pulp.
• It is also an excellent tone wood, and is used in many higher-end acoustic guitars and violins as well as musical soundboard.
• The sap can be used to make spruce gum.
• It can also be used as construction lumber and is good for millwork and for crates.
• The bark has been used to make baskets.
• Pitch can be obtained from the trunk.
• Roots have been used to make thread for sewing baskets, canoe skins etc.
• Wood is used for boxes, sash frames etc. It is also valued for its use in the pulp industry to make paper and is commonly used to produce stringed musical instruments.
• Native Americans in North America use the thin, pliable roots of some species for weaving baskets and for sewing together pieces of birch bark for canoes.

Herbal Preparations

Spruce needle and branch tip tea

Infusion

Drink 1/2 cup as needed, use for a wound wash, or prepare as a steam inhalation.

Spruce needle tincture

• 1 part fresh needles, chopped
• 2 parts menstruum (95 percent alcohol, 5 percent distilled water)

Take 10–15 drops as needed.

Spruce needle–infused oil

• 1 part fresh needles, chopped
• 2 parts oil

Use for massage.

References:

https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=18034#null

https://davesgarden.com/guides/pf/go/81129/

https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=316777

https://pfaf.org/user/Plant.aspx?LatinName=Picea+rubens

https://plants.usda.gov/core/profile?symbol=PIRU

http://www.theplantlist.org/tpl1.1/record/kew-2563588

https://en.wikipedia.org/wiki/Spruce

https://www.fs.fed.us/database/feis/plants/tree/picrub/all.html

https://en.wikipedia.org/wiki/Picea_rubens

https://plants.usda.gov/factsheet/pdf/fs_piru.pdf

http://frenchhillpond.org/Pond/Flora/Trees/Red%20Spruce%20(Picea%20rubens).htm

http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c225

http://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=137

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Spruce Quick Facts
Name:	Spruce
Scientific Name:	Picea rubens
Origin	Eastern North America, ranging from eastern Quebec to Nova Scotia, and from New England south in the Adirondack Mountains and Appalachians to western North Carolina
Colors	Chestnut brown
Shapes	Ovoid cone, 1 to 1 1/2 inches long, cone scale margins entire
Health benefits	Beneficial for colds, measles, rheumatic joints, lung complaints, throat problems, prevent skin chafing and windburn.

Name	Spruce
Scientific Name	Picea rubens
Native	Eastern North America, ranging from eastern Quebec to Nova Scotia, and from New England south in the Adirondack Mountains and Appalachians to western North Carolina
Common Names	Yellow spruce, West  Virginia spruce, eastern spruce, he-balsam, red spruce, blue spruce
Name in Other Languages	Afrikaans: Spar Albanian: Bredh Arabic: Ta’anaq (تأنق) Armenian: Zugvats (զուգված) Azerbaijani: Sıq Basque: Spruce Belarusian: елка Bengali: Phiṭaphāṭa (ফিটফাট) Bosnian: Smreka Bulgarian: Smŭrch (смърч) Catalan: Picea Cebuano: Nagpundok Chichewa: Spruce Chinese: Yún shān (云杉), hong yun shan (红云杉) Croatian: Dotjerati Czech: Smrk Danish: Gran Dutch: Net, Rode spar English: Eastern spruce, Red spruce, Yellow spruce, he-balsam, West Virginia spruce    Esperanto: Piceo Estonian: Kuusk Filipino: Mag-ayos Finnish: Kuusi, Punakuusi French: Epicéa, Prusqueur rouge, Épicéa rouge, Épinette jaune, Épinette rouge, Épicéa commun, épicéa rouge     Galician: Asseado Georgian: Nadzvis (ნაძვის) German: Fichte, Amerikanische Rotfichte, Rotfichte Greek: Elato (έλατο) Gujarati: Sprusa (સ્પ્રુસ) Haitian Creole: Spruce Hausa: Spruce Hebrew: אַשׁוּחִית Hindi: Sajaana  (सजाना) Hmong: Spruce Hungarian: Lucfenyő, Vörös luc Icelandic: Greni Igbo: Spruce Indonesian: Merapikan Irish: Sitceach Italian: Abete rosso, Picea rossa    Japanese: Supurūsu (スプルース) Javanese: Minterake Kannada: Mara (ಮರ) Kazakh: Sırşa (шырша) Khmer: Spruce Korean: Gamunbi (가문비) Lao: Spruce Latin: Picea Latvian: Egle Lithuanian: Puošnus Macedonian: Smreka (смрека) Malagasy: Kesika Malay: Merapikan Malayalam: Spruce Maltese: Spruce Maori: Puruhi Marathi: Aiṭabāja (ऐटबाज) Mongolian: Gatsuur (гацуур) Myanmar (Burmese): Spruce Nepali: Sproos (स्प्रूस) Norwegian: Gran Persian صنوبر Polish: Swierk Portuguese: Abeto Romanian: Molid Russian: Yel'(ель), el’ krasnaya (Ель красная)   Serbian: Smreka (смрека) Sesotho: Phaene Sinhala: Spaṝs (ස්පෲස්) Slovak: Fešný Slovenian: Smreka Somali: Gran Spanish: Picea, Pícea roja   Swahili: Spruce Swedish: Gran, Amerikansk rödgran Tajik: Koç (коҷ) Tamil: Taḷir (தளிர்) Telugu: Sprūs (స్ప్రూస్) Thai: Reīybr̂xy (เรียบร้อย) Turkish: Ladin Ukrainian: Yalyna (ялина) Urdu: سپروس Uzbek: Archa Vietnamese: Vân sam Welsh: Sbriws Yiddish: Tenenboym (טענענבוים) Yoruba: Spruce Zulu: Sonwele
Plant Growth Habit	Perennial, shade-tolerant, late successional, coniferous tree
Soil	Moist but well-drained sandy loam, often at high altitudes
Plant Size	18–40 meters (59–131 ft.) tall with a trunk diameter of about 60 centimeters (24 in), though exceptional specimens can reach 46 m (151 ft.) tall and 30 cm (12 in) diameter
Form	Upright and straight, with a narrow crown
Root	Minimum depth of 13 inches (33 centimeters).
Twigs	Orangish brown, finely hairy (may need a hand lens); as with all spruces, needleless twigs covered by short sterigmata (short pegs); buds orange-brown, small with loose scales, with a densely pubescent to glabrous texture
Bark	Grayish brown on surface, more reddish brown beneath with irregular, fine flaky patches, thin, and scaly
Wood	Light, soft, has narrow rings, and has a slight red tinge
Leaf	Needle-like, yellow-green, 12–15 millimeters (0.47–0.59 in) long, four-sided, curved, with a sharp point, and extend from all sides of the twig
Foliar buds	Reddish brown in color, measuring 0.2 to 0.32 inch (5 – 8 mm), with an acute apex.
Flower	Species is monoecious; males cylindrical reddish but turning yellow-brown; females purplish green
Fruit Shape & Size	Ovoid cone, 1 to 1 1/2 inches long, cone scale margins entire; seed disseminated in the fall and cones tend to drop their first winter
Fruit Color	Chestnut brown
Plant Parts Used	Bark, branch tips, needles, resin, shoots
Season	October to November
Lifespan	250 to 450+ years
Precautions	The sawdust, the resin from the trunk and even the needles can cause dermatitis in some people.