Guatemala Palm Pit Viper

Adults are usually 60–70 centimetres (24–28 in) in length, but may reach 100 centimetres (39 in), and the body is relatively slender. The color pattern consists of a green or bluish green ground color. Usually this is without any pattern, but sometimes specimens from Mexico have black flecks and dots and/or blue blotches. The dorsum of the head is a uniform green without any postocular stripe. The interstitial skin is often blue, which can also be true for the borders of some scales. The belly has a somewhat lighter color, usually a uniform yellowish-green.

Found along the Pacific versant from southeastern Chiapas in Mexico, east to south-central Guatemala. Also known from a few locations in Honduras in the southern part of the Sierra del Merendón and the Cerro Santa Bárbara. The type locality given is "Des forêts de Saint-Augustine, département de Solola (Guatémala), sur le versant occidental de la Cordillèra. 610 mètres d'altitude" [= Forests of St. [San] Augustín, on western slope of the Cordillera, Department of Sololá, Guatemala, 610 m]. Actually, San Augustín is on the southern slope of Volcán Atitlán.