LOBELIA VIVALDII (CAMPANULACEAE, LOBELIOIDEAE), A REMARKABLE NEW SPECIES OF SECT - TYLOMIUM FROM ISLA DE MONA, PUERTO-RICO

Lobelia vivaldii (Campanulaceae: Lobelioideae), a remarkable new speci es of sect. Tylomium from Isla de Mona, Puerto Rico. Brittonia 46: 273 -278. 1994-A new species of Lobelia (Campanulaceae: Lobelioideae) is d escribed from Isla de Mona, a Caribbean island not previously known to harbor the genus. The small woody rosette-plants were collected in 19 88 and 1992 at the northeastern corner of the island, where they grew from crevices in the vertical limestone cliffs, approximately 60 m abo ve the sea. The new species, Lobelia vivaldii, belongs to sect. Tylomi um, a group of approximately 36 suffruticose and woody species endemic to the Caribbean basin. Within that section, it is most similar to an d apparently derived from L. cirsiifolia, a less woody rain forest spe cies found at higher elevations on several islands in the Lesser Antil les.