Contr. U.S. Natl. Herb. 26: 158
Each value Trefle shows for Piper nigricaule, with what every source says about it. When sources disagree, the strongest source is shown (how sources are ranked). Values imported before sources were recorded one by one are marked Source not recorded.
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| Field | Shown | What the sources say | |
|---|---|---|---|
| Core | |||
| Author | Trel. |
|
Sourced |
| Bibliography | Contr. U.S. Natl. Herb. 26: 158 |
|
Sourced |
| Rank | species |
No source recorded
|
Source not recorded |
| Status | accepted |
|
Sourced |
| Year | 1929 |
|
Sourced |