I’m out of town for a couple more days, so please excuse the abbreviated entry.
Yunnan larch, as its name implies, is native to the Yunnan province of China, as well as neighbouring Burma (Myanmar). You can read a taxonomic description of Larix speciosa from the Flora of China.
Larches are the reason why it is more correct to call the group of plants including pines, spruces, fir, and cedars conifers instead of evergreens – larches are all deciduous, losing their needles in the autumn (and hence not evergreen). The genus Larix is also unique amongst conifers for having fall colouration, since the leaves turn yellow before falling (someone please correct me if I’m wrong!).
Conservation resource link: The Bombay Natural History Society is “the largest non-government organisation (NGO) in the Indian sub-continent engaged in nature conservation research”.