| Classification | Asteraceae: Porophyllum | 
| Barcode(s) | 00011417 | 
| Type Status | Lectotype | 
| Collector | E. W. Nelson | 
| Collector number | 2399 | 
| Country | Mexico | 
| State | Oaxaca | 
| Geography | North America: North America (CA, US, MX) (Region): Mexico: Oaxaca | 
| Locality | From Panixtlahuaca to Jaquila; alt. 5,000 ft. | 
| Date Collected | 1895-02-26 | 
| Elevation | 1524 m | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/964f880c-f5ac-40cd-b3a5-8772d31e98ac | 
| Harvard University Herbaria Barcode | 00011417 | 
| Herbarium | GH | 
| Family | Asteraceae | 
| Type Status |  Lectotype | 
| Lectotype of |  Porophyllum nelsonii B. L. Robinson & Greenman | 
| Verified by | Harvard University Herbaria LAPI Team | 
| Date Determined | 2008-07-01 | 
| Determination Remarks | "Nelson 2399" noted on label | 
| Taxon Reference | (for  Porophyllum nelsonii B. L. Robinson & Greenman) Proc. Amer. Acad. Arts 1896. 32: 32. | 
| Family | Asteraceae | 
| Determination |  Porophyllum nelsonii B. L. Robinson & Greenman | 
| Determined by | B. L. Robinson (GH) | 
| Date Determined | 1911 | 
| Determination Remarks |  [current name] | 
| Family | Asteraceae | 
| Determination |  Porophyllum nelsonii B. L. Robinson & Greenman | 
| Determination Remarks |  [label name] | 
| Annotation Text | n. sp. | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed | 
| Item Remarks | Mounted on the left side of the sheet; a probable syntype, Nelson 2435, is on the right (barcode 11418) |