Carlowrightia albiflora T.F. Daniel

PHENOLOGY.— Flowering: April, July–September; fruiting: July–September.

DISTRIBUTION.— Mexico (Tamps.).

HABITAT.— Thornscrub.

ELEVATION.— 300–710 meters.

NOTES.— Daniel (1983a) provided a description of Carlowrightia albiflora (Fig. 1E), which is endemic to Tamaulipas. With an EOO of 4,964 km 2 and an AOO of 24 km 2, this species could potentially be assessed as Endangered (EN) if threats and their impacts were to be identified (IUCN 2019).

REPRESENTATIVE SPECIMENS.— Sierra de San Carlos, vic. of San Miguel, Cerro de la Tamaulipeca, [24.625857°, -98.987272°], H. Bartlett 10558 (F, MICH, US) ; along hwy. between González and Est. Zaragoza, 1.4 mi SE of turnoff to Est. Zaragoza, [23.171058°, -98.770128°], T. Daniel 276 (holotype: MICH! ; isotypes: CAS!, ENCB!, F!, GH!, MEXU!, MO!, NY!, TEX!, UC!, US!), 810 (ARIZ, ASU, CHAPA, DUKE, INIF, LA, MICH, MSC, NCU); 2.8 mi S of San Carlos along Hwy. 89, [24.554275°, -98.909418°], T. Daniel 282 (ENCB, GH, MICH, US); along Hwy. 101 S of Victoria, 2.8 mi N of La Maroma, [23.550998°, -99.343397°], T. Daniel 284 (MICH) ; along Hwy. 101, 9.4 mi NNE of Jaumave, [23.544405°, -99.342086°], T. Daniel & M. Baker 3695 (ASU); Mpio. Jaumave, 3 km N de San Antonio, [23.612074°, -99.343611°], L. García-Morales 5380 (ITCV) .