FIG. I. Dry sterile tomillares (Macchia with thyme) on Serra de Valongo near Oporto, Portugal, June 21, 1923. FIG. 2. Forest of young maritime pine, Pinus pinastes, on Serra de Valongo, near Oporto, Portugal, June 21, 1923. NIL OF FIG. 3. Thymus cæspiticius in Tomillares Macchia, Serra de Valongo, near Oporto, Portugal, June 21, 1923. The thyme is in the front in prostrate mats in full flower. FIG. 4. General view of Tomillares (Macchia) with Portuguese Insectivorous Plant, Drosophyllum lusitanicum, in foreground, Serra de Valongo, near Oporto, Portugal, June 21, 1923. collecting would exterminate the plant in a few years from the mountain slopes near Oporto, and it is preserved there, because the soil is too sterile for cultivation. The species associated with Drosophyllum lusitanicum in the macchia on Serra de Valongo collected by the writer, and identified on his return home to America, and which constitute the florula of that Portuguese mountain are arranged alphabetically, as follows: Agrostis delicatula, Anthemis (Lepidophorum) repanda, Astrocarpus sesamoides, Brachytropis (Polygala) microphylla, Bonjeania (Lotus) hirsuta, Briza maxima, Cistus Clusii, C. monspeliensis, C. salvifolius, Conopodium ramosum, Cotula (Matricaria) aurea, Drosophyllum lusitanicum, Erica cinerea, E. umbellata, Genista hispanica, G. horrida, Genistella tridentata, Helianthemum tuberaria, Pinus pinaster, Rubus ulmifolius, Sedum brevifolium, Spartium strictum, Spergularia radicans, Thymus caespiticius, Tolpis barbata, Trisetum villosum, Tuberaria vulgaris, Ulex europaeus, U. micranthus, U. nanus. A few additional species added to the field note book of the writer by Prof. Gonçalo Sampaio are Avena sulcata and Succisa pinnatifida. The association, or florula, as noted on June 21, 1923, comprised 32 species and more not collected by the writer, or noted by Prof. Sampaio. The six genera of the family Droseraceae are Dionaea, Aldrovanda, Drosophyllum, Drosera, Byblis and Roridula. Aldrovanda is a rootless, swimming, aquatic plant ranging from India to southern. France. It has trap-like leaves. Dionaea is a North American plant confined to a narrow strip ten miles wide and sixty miles long near Wilmington, eastern North Carolina. Its leaves are remarkable insect traps. There are two species of Byblis endemic to Australia and the two species of Roridula occur in moors at the Cape, South Africa. The ninety species of Drosera generally inhabit bogs and situations with moist soil and their leaves of various forms. are provided with sensitive, movable tentacles, the tips of which secrete a sticky fluid, which glistens in the sunlight, hence the common name of these plants, viz., sundew. This brief summary shows that five of the genera of Droseracere have more or less specialized leaves with movable leaf blades, or movable tentacles. Drosophyllum lusitanicum with unmovable tentacles occurs in a |