. The botany of the Roraima expedition of 1884. Plants -- Roraima, Mount; Scientific expeditions -- Roraima, Mount; Botanical illustration -- Roraima, Mount. 254 MR. E. F. IM THURN ON THE PLANTS blown about on tbe surface of tbe eppelling until tbe next rains come, when it again throws out anchor-like roots into some new furrow. One orchid of this wandering ten- dency is a Catasetum (O. cristatum ? [No. Fig. 1. 148]); another is the new and very beautiful Oncidium, named and described by Mr. Ridley in the appended list as 0. orthostates [No. 12]. Sometimes, too, in this same state of the eppel
. The botany of the Roraima expedition of 1884. Plants -- Roraima, Mount; Scientific expeditions -- Roraima, Mount; Botanical illustration -- Roraima, Mount. 254 MR. E. F. IM THURN ON THE PLANTS blown about on tbe surface of tbe eppelling until tbe next rains come, when it again throws out anchor-like roots into some new furrow. One orchid of this wandering ten- dency is a Catasetum (O. cristatum ? [No. Fig. 1. 148]); another is the new and very beautiful Oncidium, named and described by Mr. Ridley in the appended list as 0. orthostates [No. 12]. Sometimes, too, in this same state of the eppelling, especially where such ground occurs on the brows of exposed hills, shrubs of considerable size find anchorage in the furrows and flourish. One such hill-top which we passed was made very beautiful in this way by a large and isolated patch of the large rosy-flowered Bonnetia sessilis, Benth. [No. 11]. In another similar place we passed through a distinct patch of the compact Stifftia condensata, Baker [No. 110]. And more than one such place was distin- guished by thickets of Gomphia gnianensis •S^-ll [No-15]*" Lastly, as regards the eppellings where the furrows of these places have been worked down into the sandstone, and have been much enlarged, the deep ravines and pits of all sizes thus formed, though bare of vegetation wherever the process of water-washing still continues in violent action, where this action has ceased owing to the stoppage of the outlet, or has become much moderated, are comparatively thickly clothed with vege- tation. Another remarkable localized plant, though not occurring on an eppelling, was the beau- tiful Aplielandra pulcherrima ? [No. 14]. It has already been said that, even on the otherwise open savannahs, more or less extensive belts of forest often clothe the sides of the narrower parts of the valleys through which the rivers run. One such place we came to, where, after crossing the Ireng river and the low watershed which there separa
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