megathermn.adj.

1874 Nature 9 July 191/2 [To] the first of his ‘physiological groups’ he gives the name Hydromegatherm, or, for short, Megatherm.

1933 Ecology 14 255 Köppen..recognizes three climatic types in Africa, characterized by the nature of the vegetation..thus: (a) Megatherms—plants which need continuously high temperatures, without much annual range..and also abundant moisture.

1960 N. Polunin Introd. Plant Geogr. vii. 211 Stretching from southern England to Japan in those far-off days, lay the tropical region of megatherms.

1989 Ann. Rev. Ecol. & Systematics 20 30 Thermal adaptations of the Australian flora have been classified into three broad groups: megatherms with a thermal optimum around 28°C, mesotherms in the 18–22°C range, and microtherms in the 10–12°C range.

1930 Ecology 11 224 Bews..holds that the cradle of the Angiosperms has been the moist, megatherm tropical forests.

1957 Jrnl. Ecol. 45 482 This flora is accounted for by the uniform temperature, still high enough for megatherm families, and the almost constant presence of mist.

1989 Ann. Rev. Ecol. & Systematics 20 31 In the wet-dry tropics of the Northern Territory where the climate is in the megatherm range there are small pockets of rain forest.