Cryptocoryne moehlmannii and Cryptocoryne pontederiifolia look very much alike when grown emersed or submerged. To properly differentiate and identify the correct species is to flower the plant(s). I have both in my emersed setup and both flowered. The whole lower part of C. moehlmannii is exactly like C. pontederiifolia. However you can clearly distinguished two by noticing red dots in the top portion of Cryptocoryne moehlmannii tube.