Helianthus annuus L.: Acahualli, chimdlatl, chim- 
alacatl, maiz de teja, girasol, sunflower. 
The sunflower is to be counted among the cultivated 
plants of early Mexico, as shown by the endemic varie- 
ties occurring there and by the descriptions of the early 
writers (90, 93). The cultivated sunflower, HZ. annuus 
var. macrocarpus (DC.) Ckll., which was also grown in 
the eastern, central and southwestern United States, is 
thought to have been derived from the wild HZ. annwus 
var. lenticularis (Dougl.) Ckll., which is widespread in 
the western United States and is limited in Mexico to the 
northern states. A form from Jalisco is found to resem- 
ble the Hopi sunflower as well as archaeological material 
from the eastern United States. While the history of 
the cultivated sunflower cannot yet be given in detail, 
it would appear to have arisen to the north of Mexico, 
where the wild form occurs and archaeological remains 
indicate long usage by man (185). (5, 89, 90*, 91*, 1838, 
185). 
Hylocereus undatus (Haw.) Brit. & Rose: Pita- 
haya. 
The cacti, which are so prominent in the landscape of 
the more arid regions, were of great importance to the 
early inhabitants, and a number were cultivated (see also 
Opuntia). The present species, a climbing vine, is widely 
grown on walls and fences as an ornamental and as a 
source of large edible fruits. (17, 24, 26*, 28, 68, 191) 
Hyptis suaveolens Poit.: Chia grande, chia de Co- 
lima, chan. 
The seeds of this labiate are used in the same manner 
as those of Salvia hispanica and it frequently goes under 
the same common name, chia. Like that species, it is a 
somewhat variable and weedy plant and now occurs in 
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