CPC Plant Profile: Hill Country Wild Mercury
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Plant Profile

Hill Country Wild Mercury (Ditaxis aphoroides)

  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Euphorbiaceae
  • State: TX
  • Nature Serve ID: 145302
  • Date Inducted in National Collection: 12/01/2021

A perennial herb, up to 5 dm tall, covered with grayish, soft hairs. Elongated clusters of flowers bloom from April to June.

Participating Institutions
Kim Taylor
  • 05/31/2017

Grazing, habitat destruction by ranchers for livestock, housing and recreation development (NatureServe 2017)

Kim Taylor
  • 05/31/2017

Individuals in 7 unprotected populations (some on highway right-of-way areas); 7 historic populations.

Nature Serve Biotics
  • 05/02/2017

Endemic to the Edwards Plateau in central Texas. About 20 occurrences are known (probably fewer than 10,000 plants in total).

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Taxon Ditaxis aphoroides
Authority Pax
Family Euphorbiaceae
CPC Number 282
ITIS 512384
Common Names Hill Country Wild Mercury | Wild Mercury | Hill Country silverbush
Associated Scientific Names Argythamnia aphoroides | Ditaxis aphoroides
Distribution Endemic to the Edwards Plateau in central Texas: Bandera, Blanco, Brown, Caldwell, Comal, Gillespie, Guadalupe, Hays, Kendall, Kerr, Menard, Mills, Tom Green, and Uvalde counties. Possibly extirpated
State Rank
State State Rank
Texas S2S3

Open grasslands associated with oak-juniper woodlands. Mostly on rolling uplands. Soils are clay loams over limestone.

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID
Honey bees Apis mellifera Not Specified Link
Butterflies & Moths
Hairstreaks Callophrys gryneus Not Specified Link
Tachinid flies Archytas apicifer Not Specified Link

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