How many species of Pinus are there?

How many species of Pinus are there?

100 species
Pinus comprises approximately 100 species, of which about half occur naturally within the northern tropics.

What are the characteristics of Pinus?

Pines have acicular-shaped leaves, commonly called needles. Needles mostly occur in fascicles of 2 to 8, except Pinus monophylla, in which they usually occur singly. The fascicle sheath is comprised of bud scales which can be either deciduous or persistent. The seed cone usually matures in 2 (rarely 3) years.

What is the classification of Pinus?


What is the habitat of pine tree?

Pines are naturally found almost exclusively in the Northern Hemisphere. They are found through much of North America, China, South-East Asia, Russia and Europe and have one of the largest distributions of any conifer family. Pine trees are the dominant plants in many cool-temperate and boreal forests.

Is Pinus a species?

Pinus, the pines, is a genus of approximately 111 extant tree and shrub species. The genus is currently split into two subgenera: subgenus Pinus (hard pines), and subgenus Strobus (soft pines).

How does different species of genus Pinus are classified?

Pines are gymnosperms. The genus is divided into two subgenera based on the number of fibrovascular bundles in the needle. The subgenera can be distinguished by cone, seed, and leaf characters: Pinus, the yellow, or hard pine group, generally with harder wood and two or three needles per fascicle.

What are the characteristics of Pinus radiata?

General characteristics Sapwood: pale yellow. Heartwood: reddish brown, varying to shades of yellow. Texture: non-uniform, consisting of alternating bands of earlywood and latewood; straight grain; knots usually present in constructional timber grades.

What are the characteristics of gymnosperms?

Characteristics of Gymnosperms

  • They do not produce flowers.
  • Seeds are not formed inside a fruit.
  • They are found in colder regions where snowfall occurs.
  • They develop needle-like leaves.
  • They are perennial or woody, forming trees or bushes.
  • They are not differentiated into ovary, style and stigma.

Is Pinus a Gymnosperm?

Pinus is a gymnosperm because it.

What group does Pinus belong to?

Kingdom : Plant Phylum : Coniferophyta Class : Pinopsida Order : Pinales Family : Pinaceae Genus : Pinus Species : palustris P. Mill Common name: Longleaf pine.

Where pine trees are found?

Pines live in almost the entire Northern Hemisphere. In North America, they live in the southern part of Arctic to Nicaragua and Hispaniola. In Europe, they live in areas from Portugal and Scotland to Russia. In Asia, they live in areas from Russia to Japan and the Philippines.

What climate do pine trees grow in?

Most pine trees grow only in USDA zones 8 and lower, but a few species tolerate growing in zone 9. Loblolly pine (Pinus taeda) thrives in moist, poorly-drained, acidic soil, and usually grows 40 to 50 feet tall and 20 to 40 feet wide in gardens, and taller in the wild. Both pines grow in USDA zones 6 through 9.

What are the three subgenera of the pinus tree?

Each of the subgenera have several sections within based on chloroplast DNA sequencing. Older classifications split the genus into three subgenera – subgenus Pinus, subgenus Strobus, and subgenus Ducampopinus ( pinyon, bristlecone and lacebark pines) – based on cone, seed and leaf characteristics.

Where are all the species of Pinus found?

Species in this section are native to Europe, Asia, and the Mediterranean, except for P. resinosa in northeastern North America and P. tropicalis in western Cuba. All but two species in Subsection Pinus are native to Eurasia. P. latteri?

How many needles does a Pinus pine have?

Pines in this subgenus have one to five needles per fascicle and two fibrovascular bundles per needle, and the fascicle sheaths are persistent, except in P. leiophylla and P. lumholtzii. Cone scales are thicker and more rigid than those of subgenus Strobus, and cones either open soon after they mature or are serotinous.

Are there any species in the subgenus Strobus?

DNA phylogeny has shown that species formerly in subgenus Ducampopinus are members of subgenus Strobus, so Ducampopinus is no longer used. The species of subgenus Ducampopinus were regarded as intermediate between the other two subgenera.