All the seed accessions from this watershed are very recent and have not been studied in
depth, but there is no reason to believe they belong to a different group from the species typical of
the region.
The "lomas" area between the lower Río Chillón and the Río Chancay is quite large. Blood and
Tremmelling collected in 1937 along the road here but the descriptions of the collecting sites do
not clarify whether the locations are strictly "loma" conditions or belong to the lower delta area to
the city of Chancay where the land holding goes under the name "Pasamayo." This name, Pasamayo,
applies also to the "lomas" of the area.
17. Watershed: Chillon
(Tables 18-20, fig. 6)
Observations on Lycopersicon spp.
This watershed has been extensively collected because of its easy accessibility from Lima. Seed
from it is available and has been studied more than from the Rímac. The L. peruvianum is of the
glandulosum form and common above 1000 m where the valley closes and a dry climate is general. No
collections are recorded below Trapiche for reasons not clear to the authors. Typical rocky and
stony places are common sites for single plants or populations of 50 or more. August through
December is the best period to collect seed.
S. pennellii has recently been collected. Similar to the next northern group (Quilca), it has been
found sympatric with L. peruvianum in all 4 localities reported (Trapiche, Pucará, Sta. Rosa de
Quives, and km 70 Lima-Canta).
L. hirsutum has been studied by Martin (1963) and self-fertile and sterile forms are available of
var. typicum. Seed collections of this species seem more common during the September through
December dry season that follows the strong growth promoted by the summer rains.
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