| Classification | Orobanchaceae: Orthocarpus | 
| Classification 1 | Orobanchaceae: Castilleja | 
| Barcode(s) | 00056081 | 
| Type Status | Isotype | 
| Collector | A. Eastwood & J. T. Howell | 
| Collector number | 2518 | 
| Country | United States of America | 
| State | California | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California: Sonoma County | 
| Locality | 2 miles north of Windsor | 
| Date Collected | 1936-05-19 | 
| Remarks | = Castilleja ambigua Hook. & Arn., det. M. Egger, 1997 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/88ce417c-ee87-453f-bbc5-027b6bcfb778 | 
| Harvard University Herbaria Barcode | 00056081 | 
| Herbarium | GH | 
| Family | Orobanchaceae | 
| Type Status |  Isotype | 
| Isotype of |  Orthocarpus sonomensis Eastwood | 
| Verified by | M. Egger | 
| Taxon Reference | (for  Orthocarpus sonomensis Eastwood) Leafl. W. Bot. 1938. 2: 104. | 
| Family | Orobanchaceae | 
| Determination |  Castilleja ambigua Hooker & Arnott | 
| Determined by | M. Egger | 
| Determination Remarks |  [current name] | 
| Sex | not determined | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |