NOTES ON THE FLORA OF YOSEMITE AND 
ADJACENT REGIONS 
E. H. PAMMEE 
I shall not try to make an extensive paper on the flora of the 
Yosemite, but merely to record my impression of this interesting 
floristic region. To persons who wish to become familiar with 
the region the following papers and books will be of interest: 
The United States Park Service hias published an interesting 
folder on the Yosemite National Park , 1 the Hall 2 .Yosemite Flora, 
John Muir’s general account 3 , Jepson 4 on the trees of California, 
Brewer and Watson , 5 botany of California, a well known treatise. 
The work of W. E. Jepson , 6 The Flora of Western Middle 
California, describes the plants of western and middle California 
and often refers to the plants of the Sierras. It is an interesting- 
change from the flora of the San Joaquin Valley to the flora of 
the Sierras. In the San Joaquin Valley as in the Sacramento there 
is a maximum of sunshine and a rainfall somewhat limited to the 
winter months. In this region there is a wealth of vernal flower- 
ing plants, making the fields aglow with the California poppies 
{Eschscholtzia Calif ornica) , Brodiaeas {B. minor), Chlorogalum 
angustifolium and many others which disappear during the hot 
summer months and are succeeded in the cultivated fields and 
roadsides by a lot of homely weeds like goosefoot ( Chenopodium 
album), tumble weed ( Amaranthus graecizans) , smartweed ( Poly- 
gonum Per sic aria), gourd {Cucurbit a foetidissima) , camphor 
weed (' Trichostema lanceolatum), horehound ( Marrubium vul- 
gare), tar weed {Hemizonia luzulaefolia) , tocalote ( Centaurea 
melitensis), Barnaby’s thistle {Centaurea solstitialis) , purslane 
{Portulaca oleracea), common plantain {Plantago major), barley 
{Hordeum murinum), wild oats {Avena fatua), crab grass 
{Digitaria sanguinalis) , blue curls (' Trichostema lanceolatuni) , 
barn yard grass {Echinochloa crus-galli) , Johnson grass {Sorghum 
1 Dept, of Interior, National Park Service, 1-77, 4 pi; 1920. 
2 Hall, H. M. and C. C., 1-282; 1912. 
3 The Yosemite, 1-284; 1912. 
4 The Silva of California; Memoirs Univ. Calif., 2: 1-480, pi. 1-85, maps 1-3, f. 1-11; 
1910. 
5 Botany Calif., Geol. Survey, 1:628; 1876, 2:1-539; 1889. Polypetalae, Brewer 
and Watson; Gamopetalae, Gray. 
6 A flora of Western Middle California, 2d Ed., 1-515. 
