Soon after entering the park, the attention is caught by bright flashes of the scarlet trumpets of the mountain gilia (_G. aggregata_), the pineland paintbrush (_Castilleja pinetorum_), and the abundant white sprays of the snowbrush (_Ceanothus velutinus_). Sheltered by the denser and more somber forests farther along are noteworthy representatives of the heath family, such as prince’s pine (_Chimaphila umbellata_) and several species of _Pyrola_, some of the latter with the usual green leaves, yet others without such foliage. Several near relatives belong to this class of leafless saprophites which obtain their food by feeding on decaying vegetation, as, for examples, the tall brownish pine drops (_Pterospora andromedea_) and the snow-white phantom orchid (_Cephalanthera austinae_). Responding to the influence of the diversity of topography and soil and moisture conditions, various types of flowers are abundantly represented around park headquarters. Near at hand on the first bare spots among the snowdrifts, cheerful harbingers of spring, come the lovely wind-flowers (_Anemone occidentalis_) with cups of white, and the strikingly beautiful yellow lamb’s tongue (_Erythronium grandiflorum pallidum_). Stone crop (_Gormania watsonii_) covers the rock ledges, and finest of the rock-loving plants, the pink pentstemon (_P. rupicola_) drapes the rock walls in company with the lace fern (_Cheilanthes gracillima_). Delicate bog orchids (_Lemnorchis_), elephant heads (_Pedicularis groenlandica_), masses of yellow and pink monkey-flowers (_Mimulus_), banks of daisy-like fleabane (_Erigeron salsuginosus_), giant ragwort (_Senecio triangularis_), and a host of others fill the wet meadows and line the streams. On the talus slopes are long strips of Arnica (_A. longifolia_). In openings in the hemlock forest the ever abundant narrow-leaved aster (_A. ledophyllus_) presents a field of purple with intermingled pink fireweed (_Epilobium angustifolium_) and the tall corn lily or false hellebore (_Veratrum_ _viride_), while the surrounding forest floor is carpeted with the grasslike turf of the smooth wood-rush (_Funcoides glabratrum_), the most abundant herbaceous plant of the upper forests. In the open pumice fields of the rim area, Douglas phlox (_Phlox douglasii_), sulphur flower (_Eriogonum umbellatum_), and the low desert lupine (_Lupinus aridus_) contribute to the varied color scheme, later transformed into red and gold by the autumnal foliage of Newberry’s knotweed (_Polygonum newberryi_). Over the crater’s rim, down the trail to the lake, one is attracted to the trailing raspberry (_Rubus lasiococcus_), clothing the steep banks, and the spiny currant (_Ribes lacustre_), prostrate on the rock walls. Abundant on the lower part of the trail and rocky shore of the lake, the large rose-pink flowers of Lewis’ monkey-flower (_Mimulus lewisii_) are the most conspicuous and striking features of the vegetation.