| Classification | Rubiaceae: Houstonia |
| Barcode(s) | 00096873 |
| Type Status | Syntype |
| Collector | V. Havard |
| Collector number | 233 |
| Country | United States of America |
| State | Texas |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Texas |
| Locality | Guadalupe Mountains |
| Date Collected | 1882 |
| Remarks | = Hedyotis nigricans ( Lam.) Fosberg |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/036d82a1-e40a-4007-a55c-7bd34c7cb48e |
| Harvard University Herbaria Barcode | 00096873 |
| Herbarium | GH |
| Family | Rubiaceae |
| Type Status | Syntype |
| Syntype of | Houstonia angustifolia var. rigidiuscula A. Gray |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Houstonia angustifolia var. rigidiuscula A. Gray) Syn. Fl. N. Amer. 1884. 1(2): 27. |
| Family | Rubiaceae |
| Determination | Houstonia angustifolia Michaux |
| Determination Remarks | [label name] |
| Annotation Text | var. |
| Family | Rubiaceae |
| Determination | Houstonia angustifolia var. rigidiuscula A. Gray |
| Annotation Text | Syn. Fl. N. Amer.; [A. Gray (scripsit) J. McI. Shapiro, 2020] |
| Sex | not determined |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
