At the summit of the Donkia Pass Hooker found one flowering plant, the _Arenaria rupifragia._ The fescue _(Festuca ovina),_ a little fern _(Woodsia),_ and a saussurea ascend very near the summit. A pink-coloured woolly saussurea and _Delphinium glaciale_ are two of the most lofty plants, and are commonly found from 17,500 feet to 18,000 feet. Besides some barren mosses several lichens grow on the top, as _Cladonia vermicularis,_ the yellow _Lecidea geographica_ and the orange _L. miniata._ At 18,300 feet Hooker found on one stone only a fine Scottish lichen, a species of gyrophora, the "tripe de roche" of Arctic voyagers and the food of the Canadian hunters. It is also abundant in the Scotch Alps. On the summit of Bhomtso, 18,590 feet, the only plants were the lichens _Lecidea miniata_ (or _Parmalia miniata)_ mentioned above, and borrera. The first-named minute lichen is the most arctic, antarctic, alpine, and universally diffused in the world, and often occurs so abundantly as to colour the rocks an orange red. * * * The entire range of plant life, from the truly tropical to the hardiest arctic, is now complete. As we look back from the limit of perpetual snow we see the whole great procession in a glance. We have come across no African, nor South American, nor Australian plants, so we have not seen anything like the _whole_ of plant life. But the range from the tropic to the arctic has been complete and continuous. In no other region could we in so short a space as a hundred miles--the distance from Bath to London--see the entire range so fully represented.