The beach near the mouth of the small Santa Catalina river is lined with mangrove trees (Rhizophora mangle); but these mangroves (manglares) are not extensive enough to affect the salubrity of Cumana's air. Otherwise the plain is partly bare and partly covered with tufts of plants including the Avicennia tomentosa, the Scoparia dulcis, a shrub-like mimosa with very sensitive leaves, (28) and especially cassias, so many of which can be found in South America that on our travels we gathered more than thirty new species.