Seasonal plant phenology data for Saddle nodal plots, 1984 - 1992.

Phenological data were collected weekly for permanently tagged plants located in 14 permanent plots (refered to as the nodal plots) in the Niwot Ridge Saddle area. 12 of the plots represent the 6 plant communities or noda (two from each nodum) identified in the Saddle (May 1973). The two remaing plots were located adjacent to two temporary snowfences erected near Saddle grid stake 49. The plots were 1x10 m, and were further divided into 10, 1x1 m quadrats. Plant species studied include Acomastylis rossii, Bistorta bistortoides and Bistorta vivipara. Ten individuals of each species present in a plot were randomly selected. Plants were tagged approximately two inches behind each plant with an aluminum tag labelled with the species abbreviation and plant number. Tagged plant locations were determined using a Cartesian coordinate system with the outside corner of quadrat 1 serving as the origin. These locations are on permanent file at INSTAAR. Data collection began on 1 June, or as plots became snow free, and continued until senescence. Missing tags were replaced during the first week of data collection. Missing plants were replaced by a new plant in the immediate area and the new coordinates were recorded.