Mt. Davis Brickell-bush
Identity
Unique IDELEMENT_GLOBAL.2.149791
Element CodePDAST1H100
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusBrickellia
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Review Date1999-12-31
Change Date2000-01-31
Edition Date2000-01-28
Edition AuthorsWilliam R. Carr
Range Extent20,000-2,500,000 square km (about 8000-1,000,000 square miles)
Number of Occurrences81 to >300
Rank ReasonsLittle information is available regarding the current status of Brickellia parvula. It is not tracked by the Heritage program in any of the three states from which it has been reported (Arizona, New Mexico and Texas); it apparently has not been reported from adjacent Mexico. Paucity of specimens from Texas suggests its rarity there (S1S2), and information in published floras of New Mexico and Arizona suggests that it is equally rare or perhaps rarer in those states. Brickellia parvula was ranked G4; this change to G3 seems justified given what is known from the limited information. However, the species has never been treated to directed field effort, and such surveys might result in new information warranting a change back to G4.
Range Extent CommentsBrickellia parvula is known from the desert mountains of the southwestern United States, including southeastern Arizona, southern New Mexico and Trans-Pecos Texas (Henrickson and Johnston, A flora of the Chihuahuan Desert region, in preparation). In Texas it has been collected from the Sierra Diablo of Hudspeth County, the Guadalupe Mountains of Culberson County and the Franklin Mountains of El Paso County, but it is apparently uncommon or at least infrequently collected in all three ranges. No information about the current status of the species in New Mexico or Arizona is readily available, but published floras suggest that it is rare in both states. Martin and Hutchins stated that Brickellia parvula is "not reported for [New Mexico] but expected on rocky hills in the southern part". Kearney and Peebles (1960) mentioned several collections from a single locality, Baboquivari Peak in Pima County.
Occurrences CommentsBrickellia parvula is not tracked (monitored) by the Heritage program in any of the three states from which it is known, and information about occurrences is limited. Given its global range it is likely that the species occurs in more than 100 sites, but additional information will be needed for a more precise estimate.
Threat Impact CommentsThreats to Brickellia parvula are unknown. Most of the Texas species of Brickellia are shunned by livestock and wildlife, but it is unknown whether this generalization applies to Brickellia parvula. Mechanical and other human-caused disturbances to its montane habitat are unlikely.