Urochloa arizonica
Arizona signal grass
2
Bishop specimens
0
Type specimens
1941
First collected
1976
Last collected
2026
Last seen alive
Two centuries of collecting
The oldest Bishop specimen was collected in 1941 by Angostura, L.; Santos, J.V. (Grasses of the Region of the Rio De Bavispe. Northeastern Sonora, Mexico). The Museum last collected it in 1976; iNaturalist observers have seen it in the wild as recently as October 26, 2026.
From the collection
Alive today
210 research-grade iNaturalist sightings in the wild since 2000. Most recent first.
2026-10-26
La Paz, MX-BS, MX
(c) jrebman, some rights reserved (CC BY-NC)
2026-10-25
La Paz, B.C.S., MX
(c) Sula Vanderplank, some rights reserved (CC BY)
2026-10-25
23247 B.C.S., México
(c) Abraham Sánchez Romero, some rights reserved (CC BY)
2026-10-24
Pima County, AZ, USA
(c) yamstress, some rights reserved (CC BY-NC)
2026-10-12
Loreto, B.C.S., MX
(c) Sula Vanderplank, some rights reserved (CC BY)
2026-10-10
23893 B.C.S., México
(c) Jennifer Ruelas, some rights reserved (CC BY-NC)
2026-10-10
23893 B.C.S., México
no rights reserved
2026-10-09
Loreto, B.C.S., México
(c) Sula Vanderplank, some rights reserved (CC BY)