SP Myors 1975 Journal Transact 2 13 August (cont) (Univ. of Colorado) for the IBP arctic tundra biome project. See opposite attached sheet. I have added two classifications: ① - no vegetation on the surface of the 2m radius circle, and ② an association dominated by Carex aquatilis and fruticose lichens but lacking any Poa arctica. This typically occurs near margins on the hummocky polygon rims of rising low center polygons - i.e. low center polygons with Carex-Eriophorum centers, often shallow water, sometimes Arctophila ponds, which have pronounced vertical relief - seldom invariably over 20 cm, usually more, up to 50-60. I have separated this association from the mesic Carex-Poa because it lacks the dense monocot stands of Poa, having competitive Carex, sometimes Luzula arctica, and unusually Arctagrostis latifolia. It differs from the Carex-Eriophorum association because of the presence of fruticose lichens, indicating a moister moisture regime, reflecting better drainage and (often as a result of) the increased micro relief present, in contrast with very low Carex-Eriophorum or (Carex-Oncoporus) low center polygon rims. ② also lacks any Salix rotundifolia, otherwise it would be classified as ②. I believe these differentiations useful for two reasons: first, because it probably makes a great deal of difference to a bird whether it is foraging in the relatively open vegetation of ① but one which is deeper than ⑥. Secondly, because the occurrence of this type is associated strongly with the high rimmed low center polygons and ponds, and will therefore add another potentially significant variable for subsequent transect analysis. Transect 4 18 Aug began taking herb data on ④, finishing one diagonal of all units. However the cold was greater than my novice so after those four hours I returned to camp. Transect 1,3,5 19 August began sampling ⑤ at 0720 - strong E wind , [illegible] total a 1 3 5 alpina i 1 1/2 4 j 0 0 2 melander i 0 1 0 j 3 3 4 Ph. felicinio i 0 0 0 j 0 0 6 Pliorials d 3 2 0