Regularity: Regularly occurring
Catalog Number: US 3067911
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): E. L. Little Jr. & D. S. Correll
Year Collected: 1963
Locality: 30 mi N of del rio, 13 mi. S of Loma Alta., Val Verde, Texas, United States, North America
Elevation (m): 1500 to 1500
- Holotype: Little Jr., E. L. 1966. Wrightia. 3: 183.
Habitat and Ecology
Molecular Biology and Genetics
Barcode data: Pinus remota
Statistics of barcoding coverage: Pinus remota
Public Records: 7
Specimens with Barcodes: 11
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
National NatureServe Conservation Status
Rounded National Status Rank: N4 - Apparently Secure
NatureServe Conservation Status
Rounded Global Status Rank: G4 - Apparently Secure
Reasons: Distribution limited to southwestern Texas and across the border in northeastern Mexico at 1,200-1,800 m altitude in semi-arid conditions.
Pinus remota is a small tree or large shrub, reaching 3-10 m tall and with a trunk diameter of up to 40 cm. The bark is thick, rough, and scaly. The leaves ('needles') are in mixed pairs and threes (mostly pairs), slender, 3-5 cm long, and dull gray-green, with stomata on both inner and outer surfaces. The cones are squat globose, 3-5 cm long and broad when closed, green at first, ripening yellow-buff when 18–20 months old, with only a small number of thin scales, with typically 5-12 fertile scales.
The cones open to 4-6 cm broad when mature, holding the seeds on the scales after opening. The seeds are 10-12 mm long, with a very thin shell, a white endosperm, and a vestigial 1-2 mm wing; they are dispersed by the Western Scrub Jay, which plucks the seeds out of the open cones. The jay, which uses the seeds as a food resource, stores many of the seeds for later use, and some of these stored seeds are not used and able to grow into new trees.
Texas pinyon was previously included in Mexican pinyon, only being discovered to be distinct in 1966 when US botanist Elbert L. Little noticed that the seed shells of some pinyons in Texas were very thin compared to those of some others. He treated it as a variety of Mexican pinyon, Pinus cembroides var. remota. Subsequent research found other differences, and it is now usually treated as a distinct species, probably more closely related to the Colorado pinyon P. edulis, which shares thin seed shells and needles mostly in pairs. Texas pinyon differs from both Mexican and Colorado pinyons in the very small, recessed umbo on the cone scales (larger and knob-like on other pinyons).
Distribution and habitat
The range is in western Texas, United States, on the south edge of the Edwards Plateau and the hills between Fort Stockton and Presidio, and in northeastern Mexico, mainly in Coahuila but also just into Chihuahua and Nuevo León. It occurs at low to moderate altitudes, from 450-700 m on the Edwards Plateau and from 1200-1800 m in the rest of its range. It is scarce, with small, scattered populations usually on dry, rocky sites and arroyos where bare rock lowers the likelihood of wildfire spreading easily.
The edible seeds are occasionally collected like those of other pinyons, and sold as pine nuts; however, in its barren, dry habitat, infrequent and small crops are normal, reducing its economic value. It is occasionally planted as an ornamental tree, where its remarkable tolerance of drought and even semi-desert conditions makes it valuable in hot, dry areas.
Names and Taxonomy
Comments: Little (1966) first described this taxon as a variety of P. CEMBROIDES. Bailey & Hawksworth (1979) raised it to specific status.