| Author | P.W. Michael | |
| Distribution | Collected from the Coastal Plain and lower Piedmont, with a large central gap. The website editors have mapped only those specimens that have been annotated to V. incompta from V. bonariensis. There may be other "bonariensis" specimens that need to be transferred from that species account, and thus reducing its NC distribution.
Native of South America; in N.A. mostly VA to MO south to FL and TX; scattered elsewhere. | |
| Abundance | Probably rare to uncommon, but much doubt still remains about its distribution and abundance versus V. bonariensis. | |
| Habitat | Fields, cropfields, pasture, roadsides. | |
| Phenology | Flowering and fruiting May-October. | |
| Identification | This species apparently looks very much like V. bonariensis, which see, but with a shorter corolla tube and non-glandular stems, peduncles, and calyces; V. bonariensis has sticky upper stems, peduncles, and calyx lobes. Weakley (2018) also says that this species has the basal and midstem leaves ovate to obovate, versus narrower (mostly lanceolate or oblanceolate) such leaves in V. bonariensis. | |
| Taxonomic Comments | This species has been recently split from V. bonariensis, and much remains to be known how to separate these two.
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| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | FACU link |
| USACE-emp | FACU link |
