Plaubelia sprengelii var. stomatodonta
Bull. Buffalo Soc. Nat. Sci. 32: 176. 1993,.
Leaves with apiculus sometimes lacking; costa percurrent or ending short of the leaf apex; adaxial distal laminal cells mammillose, also papillose on one or both surfaces.
Phenology: Capsules mature winter–spring.
Habitat: Thin crusts on limestone rock
Elevation: low elevations
Fla., Mexico, West Indies (Cuba), West Indies (Jamaica), Central America (Guatemala), Central America (Honduras), South America (Brazil)
The extensive variation of Plaubelia sprengelii var. stomatodonta was described by R. H. Zander (1983); specimens of intermediate morphology can be found both from Mexico and those that derive from the flora region. All specimens of this variety seen from Florida regularly had two stereid bands and a hydroid strand in the costa, characters displayed even in minute specimens.
"um" is not declared as a valid unit of measurement for this property.