Convolvulus crenatifolius subsp. crenatifolius

Wood, John R. I., Williams, Bethany R. M., Mitchell, Thomas C., Carine, Mark A., Harris, David J. & Scotland, Robert W., 2015, A foundation monograph of Convolvulus L. (Convolvulaceae), PhytoKeys 51, pp. 1-282 : 92-93

52a. Convolvulus crenatifolius subsp. crenatifolius Figure 8, t. 40-46

Convolvulus crenatifolius var. peruvianus Hallier f., Jahrb. Hamburg. Wiss. Anst. 16, beiheft 3: 34. 1899, nom illeg. superfluous name for autonymic variety ( Hallier 1899: 34).

Distinguishing features.

Distinguished by the more numerous flowers (there are nearly always some cymes with>3 flowers), the relatively short pedicels, the cymes usually forming rather tight umbellate clusters, and the smaller, usually pinkish, lobed corolla.

Distribution.

Amphitropical, Andes and southern Brazilian highlands in South America; United States of America and Mexico in North America: Ecuador (Lodiro 113/5); Peru (Stafford 1041, Lechler 2116); Bolivia (Wood 17714, Bang 1158); Argentina (Meyer 5018, Villa 543); Brazil (Meireles et al. 2783, Tamandaré & Brade 6987); United States: Texas (Runyon 2599, 4479, Correll & Wasshausen 27684); Mexico: Guadelupe (Schmitz 1098 (W), Hidalgo, Rose et al. 8946 (P, US). Approximately 1500-3000 m in South America but to near sea level in Texas.

Notes.

In South America this species appears to be distinctly montane in distribution being limited to the Andes and the higher mountains of southeastern Brazil. Specimens from Andean Bolivia, Peru and Ecuador are very consistent in habit. Its status in North America is uncertain. The leaves are often more strictly triangular and more coarsely dentate than in South American plants but some specimens such as Dusén 7788 from Paraná, Brazil are indistinguishable. It may be an introduction in North America like Convolvulus farinosus - we have seen no specimens collected before the 20th century - but equally it may be the result of long-term dispersal. Species of Convolvulaceae in varous genera, such as Ipomoea amnicola Morong and Evolvulus arizonicus A.Gray show a disjunct amphitropical distribution between North and South America so a distribution of this kind is not improbable.