DISTRIBUTION AND OCCURRENCE
SPECIES: Gutierrezia microcephala | Threadleaf Snakeweed 



GENERAL DISTRIBUTION : 
Threadleaf snakeweed occurs in the Chihuahuan, Sonoran, Mojave, and
Great Basin deserts of the southwestern United States and northern
Mexico.  It occurs from southwestern Texas; north to extreme
southwestern Colorado and south-central Utah; west to southern
California; and south to the Mexican states of Sonora, Chihuahua, and
Coahuila [16,18,27,31,39,40].


ECOSYSTEMS : 
   FRES21  Ponderosa pine
   FRES30  Desert shrub
   FRES33  Southwestern shrubsteppe
   FRES35  Pinyon - juniper
   FRES40  Desert grasslands


STATES : 
     AZ  CA  CO  NV  NM  TX  UT  MEXICO


ADMINISTRATIVE UNITS : 
     ARCH  BIBE  CACH  CANY  CARE  CACA
     CHCU  CORO  DEVA  FOBO  GLCA  GRCA
     GUMO  JOTR  LAME  LAMR  MOCR  NABR
     PEFO  SAGU  TONT  WACA  WHSA  WUPA
     ZION


BLM PHYSIOGRAPHIC REGIONS : 
    3  Southern Pacific Border
    6  Upper Basin and Range
    7  Lower Basin and Range
   12  Colorado Plateau
   13  Rocky Mountain Piedmont


KUCHLER PLANT ASSOCIATIONS : 
   K019  Arizona pine forest 
   K023  Juniper - pinyon woodland
   K039  Blackbrush
   K040  Saltbush - greasewood
   K053  Grama - galleta steppe
   K054  Grama - tobosa prairie
   K057  Galleta - three-awn shrubsteppe
   K058  Grama - tobosa shrubsteppe
   K059  Trans-Pecos shrub savanna


SAF COVER TYPES : 
NO-ENTRY


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Threadleaf snakeweed occurs in arid grassland and desert shrub
communities.  In an arid grassland in New Mexico, threadleaf snakeweed
occurs with galleta (Hilaria jamesii), sand dropseed (Sporobolus
cryptandrus), black grama (Bouteloua eriopoda), and ring muhly
(Muhlenbergia torreyi) [29].  Other desert associates include Joshua
tree (Yucca brevifolia), Nevada ephedra (Ephedra nevadensis), cholla
cactus (Opuntia spp.), and Mojave desertrue (Thamnosma montana) [3,4].

Related categories for Species: Gutierrezia microcephala | Threadleaf Snakeweed