Zornia thymifolia Kunth, 2025

Zornia thymifolia Kunth View in CoL , Nov. Gen. et Sp. 6: 514. 1824.

Figs 12 View Figure 12 , S 1 View Figure 1

Type: MEXICO. Chihuahua: gravelly plains near Chihuahua, October 1886, C.G Pringle 726 (Neotypification here designated: W–0272598 !; isoneotypifications CAS–00005028 !, MEXU–01169209 !, NDG–27133 !, NY–01546367 !, NY–01546368 !, P–02936702 !, P–02936703 !, P–02936704 !, P–02936705 !, US–000838667 !) .

Shrub to ca. 30 cm tall. Stems prostrate, branched, glabrous. Leaves with 2 leaflets, petiolate. Leaflets 5–14 × 3–6 mm, lanceolate, glabrous. Stipules elliptic, 3–5 veined. Inflorescences spiciform, axillary, 15 cm long. Bracteoles 5–10 × 3–5 mm, ovate, 5–7 veined, punctate, glabrous, green. Loment with 2–4 articles; articles 1.5–2 × 1.5–2 mm, reticulate-veined, bristle-like trichomes 0.5 mm long.

Distribution and habitat: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua. It occurs mainly in Tropical Dry Forest.

Conservation Status: Vulnerable (VU). Zornia thymifolia occupies a fragmented AOO of its overall extensive range in the Central America and Mexico (EOO= 1,209,460.180 km ²; AOO= 192.000 km ²).

Notes: This species is identified by its glabrous indumentum and its ovate bracteoles.

Mohlenbrock (1961) designated Pringle 726 as a neotype for Zornia thymifolia , but he did not specify a particular specimen from amongst the multiple duplicates of this collection. Therefore, a second-step neotypification is presented here.

Representative specimen examined: EL SALVADOR. Ahuagapan: Sierra de Apaneca, Fina Colima, s.d., Standley 20113 (NY). GUATEMALA. Alta Verapaz: Cohan, s.d., von Tuerckheim 8495 (US). HONDURAS. El Paraiso: Guinope, s.d., Rodriguez 1677 (F). MEXICO. Chiapas: Tonala, s.d., Nelson 2896 (US).