At the northern end of the range, it is highly doubtful whether the peruvianum range extends into Ecuador. Presumed collections of this species, including Blood and Tremelling's PI 129150 & 129151 (west  of  Guayaquil)  and  Winters  and  Clark's  PI  390516-390518  (vicinity  of  Jipijapa)  have  been positively identified as L. hirsutum f. glabratum. The coastal type of group 3 is fairly uniform with the exception of collections from the Chilca- Topará  district,  which  differ  from  others  in  highly  compound  and  more  canescent  leaves  and condensed  inflorescences.  This  exceptional  race  shows  peculiar  crossing  affinities  with  northern mountain races like Otuzco and var. humifusum and L. chilense (Rick 1963). The coastal type is well exemplified   by   the   Culebras   accessions   (PI   126944126946,   LA372,   374).   Except   for   the aforementioned  Chilca-Topará  race,  no  striking  genetic  or  morphological  differences  have  been detected  to  date  between  Culebras  and  Nazca  (fig.  1).  The  plants  are  generally  found  as  weeds  in populations of one to hundreds in fields of sandy or sandy loam soil. A few specimens have been collected in dry washes after huaycos (avalanches of stones and mud) or after a normal rainy season. In  the  latter  sites  they  are  commonly  sympatric,  but  usually  in  lower,  slightly  moister  positions, indicating a certain similarity in moisture and drainage requirements. As weeds, the plants can be found at any time of the year depending on the irrigation regime. The mountain races of L. peruvianum, found 1200 m and higher, are based on genetic relations and phenotypic observations (Rick 1963), which always have to be taken with much care in working with this species. The watersheds are divided into three groups as follows: Except  for  var.  humifusum,  which  is  usually  found  in  populations  of  a  few  individuals,  the  other "good" races usually consist of many plants at different sites over an altitude range of 750-1200 m at the lower limit and 2000-3000 m at the upper limit. Sympatry with L. hirsutum is common between 1200 and 2500 m; with S. pennellii, at around 1200 m from the Casma to the Pisco. Cohabitation with  L.  pimpinellifolium  is  often  observed  at  the  lower  elevations.  Specific  plant  associations  are mentioned by collectors for only 30 sites. The associations stated more than once are: Loaza spp. (13% of the cases); Jatropha and Heliotropium (10%); and Zinnia and Onoseris albicans (7%).   General vegetational data are presented for 50 sites. The situations vary from no vegetation or dormant vegetation (two cases), association with grasses, Compositae, or a yellow-flowered legume (three cases each), with cacti (six cases), and as a weed (six cases). It is safe to generalize that the main characteristic of peruvianum habitats is dry to medium dry conditions, which are specifically mentioned in 50% of the sites. d. Solanum pennellii (Table 4). Seed collections have been mainly successful from October to December and only two sites above 1600 m have been recorded: Tingo-Pacaraos (Huaral) at 2300 m and km 70 road to Canta (Chillón) at 1800 m.

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