1917] VESTAL—FOOTHILLS VEGETATION 383 
Calochortus Gunnisonii Pentstemon humilis (/a) 
Zygadenus intermedius (ch) - Pentstemon unilateralis 
Iris missouriensis (/2) Castilleja linariaefolia (ch) 
‘ Claytonia virginiana Castilleja sulphurea 
Cerastium arvense (ch) Orthocarpus luteus 
Delphinium Nelsonii (ch) Galium boreale (ch 
Thlaspi coloradense (?) Ca eo. recer rotundifolia 
Erysimum Wheeleri (ch) Aster laevi 
Saxifraga rhomboidea (ch) Erigeron fee 
Potentilla pennsylvanica strigosa (ch) Achillea millefolium 
Thermopsis divaricarpa (ch) Arnica cordifoli 
rni 
ca fulgens (/a 
Senecio integerrimus (/a) 
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ca. 
Viola canadensis Rydbergii 
The prairie grass aspect has already been mentioned, and a description 
cited. The foothill meadow assemblage in early summer typically shows 
such conspicuous plants as Delphinium, Cerastium, Arnica, Senecio, and 
sag linariaefolia (C. sulphurea is frequent only in the higher eleva- 
ons). The mixed shrub association frequently alternates with meadow, and 
eck upon it, and is bordered by the taller herbs with that assemblage. 
The forest border and forest undergrowth communities have also been 
mentioned. 
oist rock crevices in sheltered ravines become overgrown with cushions of 
Selaginella (fig. 2) and smaller cushions of mosses; humus accumulates by the 
growth and death of these plants; in this Seiinias rhomboidea and later other 
herbaceous or woody plants may become established. This is a very common 
successional series from oad rock in mesophytic habitats. 
Herbaceo eous plants commonly seen scattered along the moist soil of stream 
margins, in open dauae include Rumex sp., Heracleum lanatum, Thermopsis, 
and Lupinus, with certain grasses, as Muhlenbergia racemosa, Eatonia obtu- 
Sata, etc. 
Hygrophilous and amphibious ‘Plants of the canyon streams may for 
convenience be mentioned at this point. Marchantia polymorpha is found on a 
very few stream —- on ‘ie: or in crevices in sheltered spots. Many 
mosses may accompany it, especially where some soil accumulates in cracks of 
stream-side boulders, etc. Dodecatheon radicatum may here be found, or 
species of Ranunculus in boggy places. A number of species are seen in 
these very restricted boggy places. Mimulus Langsdorfii and Veronica 
americana may grow there or in quiet little pools of the stream itself. 
RaMALEY has given these growths the name Stream Bank Marsh Society 
(2, p. 227). 
Eastern Intivors STATE NorMAL SCHOOL 
CHARLESTON, 
