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Pinus attenuata Lemmon
Life   Plantae   Gymnospermae   Pinaceae   Pinus

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Associates · map
FamilyScientific name @ source (records)
Aphididae  Essigella ( @ CSCA_TCN (1)

Schizolachnus piniradiatae @ CSCA_TCN (1)
Coniophoraceae  Coniophora suffocata @ BPI (1)
Corticiaceae  Corticium vellereum @ BPI (1)
Cronartiaceae  Cronartium cerebroides @ BPI (1)

Cronartium harknessii @ BPI (3)

Cronartium pyriforme @ BPI (1)

Cronartium stalactiforme @ BPI (1)

Peridermium cerebroides @ BPI (3)

Peridermium stalactiforme @ BPI (2)
Dacrymycetaceae  Dacrymyces deliquescens @ BPI (1)
Diaspididae  Dynaspidiotus californicus @ CSCA_TCN (1)
Helotiaceae  Cenangium @ BPI (1)
Hydnaceae  Hydnum stipatum @ BPI (1)
Meruliaceae  Merulius armeniacus @ BPI (1)
Miridae  Deraeocapsus fraternus @ AMNH_ENT (6)

Deraeocoris brevis @ AMNH_ENT (16)

Deraeocoris mutatus @ AMNH_ENT (2)

Deraeocoris picipes @ AMNH_ENT (2)

Deraeocoris @ AMNH_PBI (10)

Pappus rolfsi @ AMNH_ENT (1)

Pappus rubripes @ AMNH_ENT (3)

Phoenicocoris nevadensis @ AMNH_PBI (1)

Phytocoris fraterculus @ AMNH_PBI (7)

Phytocoris jucundus @ AMNH_PBI (7); AMNH_ENT (3)

Phytocoris mellarius @ AMNH_ENT (1)

Phytocoris occidentalis @ AMNH_PBI (10); AMNH_ENT (1)

Phytocoris politus @ AMNH_PBI (1)

Pilophorus tibialis @ AMNH_PBI (113)
Mycosphaerellaceae  Lecanosticta acicola @ BPI (1)
Nectriaceae  Fusarium oxysporum @ BPI (2)
Peniophoraceae  Peniophora cinerea @ BPI (1)
Polyporaceae  Polyporus abietinus @ BPI (1)

Polyporus amorphus @ BPI (1)

Trametes setosus @ BPI (1)
Rhytismataceae  Hypodermella lacrimiformis @ 650709A (1); BPI (1); 650709B (1)

Hypodermella medusa @ BPI (1)

Hypodermella montivaga @ BPI (1)

Lophodermium pinastri @ BPI (1)

Propolis leonis @ BPI (1)
Strophariaceae  Pholiota @ BPI (1)

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37. Pinus attenuata Lemmon, Mining Sci. Press. 64: 45. 1892.

Knobcone pine

Pinus tuberculata Gordon 1849, not D.Don 1836

Shrubs or trees to 24m; trunk to 0.8m diam., usually straight; crown mostly narrowly to broadly conic. Bark purple-brown to dark brown, shallowly and narrowly fissured, with irregular, flat, loose-scaly plates, on upper sections of trunk nearly smooth. Branches ascending; twigs slender, red-brown. Buds ovoid to ovoid-cylindric, dark red-brown, aging darker, ca. 1.5cm, resinous; scale margins fringed, apex attenuate. Leaves 3 per fascicle, spreading or ascending, persisting 4--5 years, (8--)9--15(--20)cm ´ (1--)1.3--1.8mm, straight or slightly curved, twisted, yellow-green, all surfaces with fine stomatal lines, margins serrulate, apex abruptly conic-subulate; sheath (1--)1.5--2cm, base persistent. Pollen cones ellipsoid-cylindric, 10--15mm, orange-brown. Seed cones maturing in 2 years, serotinous, long-persistent, remaining closed for 20 years or more, or opening on burning, in whorls, hard and heavy, very asymmetric, lanceoloid before opening, ovoid-cylindric when open, 8--15cm, yellow- or pale red-brown, stalks to 1cm; apophyses toward outside base increasingly elongate, mammillate or raised-angled-conic, downcurved near base, scarcely raised on branchlet side, rhombic; umbo central, low-pyramidal, sharp, upcurved. Seeds compressed-oblique-obovoid; body ca. 6--7mm, nearly black; wing narrow, to 20mm. 2 n =24.

Fire successional on dry slopes and foothills of Sierra Nevada and the Cascade and Coast ranges; 300--1200m; Calif., Oreg.; Mexico in Baja California.

Pinus attenuata , mostly a chaparral species, bears cones at an early age. Its seed crops are heavy, and a hot fire permits the seeds to be released. It forms hybrids with P . muricata and P . radiata .

Updated: 2024-04-25 04:20:18 gmt
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