DRY GRASSLAND OF A MOUNTAIN PARK 



269 



*Eriogonum umbellatum, 3, 4 

 Polygonum engelmannii, 3 

 Chenopodium oblongi folium, 4 

 {Alsinopsis obtusiloha), 2 

 Arenaria fendleri, 4 

 *Cerastium occidentale, 2 

 Silene hallii, 4 

 {Anemone globosa), 2 

 {Delphinium nelsonii), 2 

 {Pulsatilla hirsutissiyna) , 1, 2 

 {Ranuncidus cardiophyllus), 2 

 {Capnoides aureum), 2, 3 

 {Arabis connexa), 2 

 Arabis divaricarpa, 2 

 Erysimum wheeleri, 2 

 Thlaspi purpurascens, 1 

 *Sedum stenopetalum, 3 

 Micranthes rhomboidea, 2 

 Dasiphora fruticosa, 3 

 *Potentilla concinna, 2 

 *Potentilla hippiana, 3 

 {Potentilla monspeliensis) , 3 

 Potentilla nuttallii, 3 

 *Potentilla pennsylvanica strigosa, 3 

 Potentilla pulcherrima, 3 " 

 {Sieversia ciliata), 2 

 {Aragallus albiflorus), 3 

 *Aragallus lambertii, 3 

 *Aragallus richardsonii, 3 

 {Astragalus sulphurescens) , 4 

 Homalobus fiexuosus, 3 

 {Homalobus tenellus), 4 

 {Tium alpinum), 3 

 Xylophacos parryi, 3 

 Gayophytum ramosissiynum, 4 

 Pseudoctjm.opterus tenuifolius, 3, 4 

 {Arctostaphylos uva-ursi), 2 

 Vaccinium caespitosum, 3 

 Androsace puberulenta, 3 



Amarella plebeja, 5 

 Dasystephana parryi, 5 

 {Gilia scariosa), 3 

 {Phacelia heterophijlla) , 3 

 *Mertensia bakeri, 1 

 Mertensia lateriflora, 2 

 {Collinsia parviflora), 2 

 *Orthocarpus luteus, 4 

 {Pentstemon oreophilus), 3 

 Pentstemon procerus, 3 

 Galium boreale, 3 

 *Campanula petiolata, 4 

 *Achillaea lanulosa, 4 

 *Antennaria anaphaloides, 3 

 *i4.niennana aprica, 2, 3 

 *^n^ennarza arida, 2, 2 

 (Aniennana corymbosa) , 3 

 *Aniennan'a microphylla, 3 

 {Antennaria oxyphylla) , 3 

 Antennaria rosea, 3 

 Artemisia aromatica, 4 

 * Artemisia forwoodii, 4 

 *Ar/emts{a frigida, 4 

 ^riemfsm gnaphaloides, 4 

 *Chrysopsis foliosa, 4 

 {Chrysothamnus elegans), 4 

 {Chrysothamnus parryi), 4 

 Erigeron flagellaris, 3 

 Erigeron eximius, 4 

 Erigeron macranthus, 4 

 Erigeron multifidus, 2, 3 

 {Erigeron speciosus), 4 

 Gaillardia aristata, 4 

 {Senecio werneriaefolius), 3 

 Senecio perplexus, 2, 3 

 Solidago concinna, 4 

 Solidago oreophila, 4, 5 

 Agoseris glauca, 4 



SUMMARY 



The foregoing pages report an intensive study through four 

 seasons of the dry grassland of a mountain park in northern 

 Colorado at an altitude of about 9000 feet. The vegetation is 

 described as low-growing, consisting largely of grasses and 

 sedges with many profusely-flowering perennials. Five seasonal 



