tecpantli (T1871:1)
This notation that is also a simplex glyph represents the number twenty (tecpantli). It consists of a red flag (panitl) or (cempohualli). It refers to a measurement for a parcel. The flag is on a (possibly blue or turquoise) post, with the fabric or paper flying to the viewer's right.
Stephanie Wood
The more abbreviated term pantli can refer to an agricultural furrow, and furrows were counted and expressed almost as a type of measurement for an agricultural parcel. Flags representing a count of twenty were originally perfect rectangles in shape, but this one shows some European influence, with the curve indenting the right margin--almost a burgee or guidon in the Western tradition, yet still retaining something of the vertical pre-Columbian banner shape. Some flag shapes and their names can be found here.
Stephanie Wood
1558
Stephanie Wood
numbers, números, veinte, flags, banderas, twenty, 20, cempohualli
tecpan(tli), twenty, https://nahuatl.wired-humanities.org/content/tecpantli
veinte
Single-page codex, Archivo General de la Nación, México, Ramo de Tierras, vol. 1871, exp. 1, fol. 28r.
The Archivo General de la Nación (AGN), México, holds the original manuscript. This image is published here under a Creative Commons license, asking that you cite the AGN and this Visual Lexicon of Aztec Hieroglyphs.