Field number : AL 37
Collector : Andreas Laras
Species : Echinocereus davisii   
Locality : USA : Texas (Marathon)     Google Maps  * Geocode
Date :
Notes :

---

Field number : GLF 567
Collector : Charles (Charlie) Edward Glass, Robert Alan (Bob) Foster (also see notes)
Species : Echinocereus davisii   
Locality : on Highway 385, 4 miles South of Marathon, Texas, USA     Google Maps
Date :
Notes :

---

Field number : GLF 1615
Collector : Charles (Charlie) Edward Glass, Robert Alan (Bob) Foster (also see notes)
Species : Echinocereus davisii   
Locality : USA : Texas (3.5 miles South of Marathon)     Google Maps  * Geocode
Date :
Notes :

---

Field number : LZ 578
Collector : Eberhard Lutz
Species : Echinocereus davisii   
Locality : USA : Texas (Marathon)     Google Maps  * Geocode
Date : 15/03/1998
Notes :

---

Field number : GCG 10691
Collector : GCG - gerardo.cz
Species : Echinocereus davisii   
Locality : Mexicó : (4 miles of Marathon)     Google Maps
Date :
Notes :

---

Field number : HK 1221
Collector : Horst Kuenzler
Species : Echinocereus davisii   
Locality : Brewster County, Texas, USA     Google Maps
Date :
Notes :

---

Field number : LRM 31
Collector : Living Rocks of Mexico. Now Geoff Bailey, John Miller, previously also David (Dave) Rushforth.
Species : Echinocereus davisii   
Locality : Marathon, Texas, USA     Google Maps
Date : 22/06/09
Notes :

---

Field number : TO 17
Collector : Traute, Jörn Oldach
Species : Echinocereus davisii   
Locality : Marathon, Texas, USA     Google Maps
Date :
Notes :

---