354 
Shumard red oak (Quercus shumar- 
adit). 
Sierra, 
bearberry (Arctostaphylos nevaden- 
sis). 
bladdernut (Staphylea bolanderi). 
cotteeberry (Rhamnus rubra). 
currant (Ribes nevadense). 
gooseberry (Ribes roezlii). 
maple (Acer glabrum). 
plum (Prunus subcordaia). 
sweet bay (Myrica hartwegii). 
willow (Salix commuiata, 
Salia orestera). 
Silkbay (Persea humiiis). 
Silktassel, 
Coast (Garrya eliiptica). 
Fremont (Garrya fremontii). 
Pale (Garrya fiavescens). 
Veatch (Garrya veatchii). 
Yellowleaf (Garrya flavescens). 
Silktassel bush (Garrya elliptica, 
Garrya lindheimeri). 
Silktree (Albizzia julubrissin). 
Silky, 
camellia (Stuartia malachodendron). 
cornel (Cornus amomum). 
willow (Salix sericea, 
Saliva sitchensis). 
Silver, 
bireh (Betula lutea, 
Elaeagnus argentea). 
push (Hlaeagnus argentea). 
bush, desert (Shepherdia rotundi- 
folia). 
chain (Robinia pseudoacacia). 
fir (Abies amabilis, 
Abies concolor, 
Abies grandis). 
lupine (Lupinus albifrons). 
mapie (Acer saccharinum). 
mountain-mahogany (Cercocarpus 
argenteus). 
o2k (Quercus hypoieuca). 
poplar (Populus alba). 
sagebrush (Artemisia cana). 
willow (Salix argyrccarpa, 
Salix discolor, 
Saliz geyeriana). 
Silverbell, (Halesia carolina). 
Little (Halesia parviflora). 
Mountain (Halesia monticola). 
Two-wing (Halesia diptera). 
Silverbell tree (Halesia carolina). 
Silverberry (Hlaeagnus argentea). 
Silverleaf, 
hydrangea (Hydrangea radiata). 
willow (Saliz argophylla). 
Silverling (Baccharis halimifolia). 
Silvery wormwood (Artemisia filifolia). 
Single spruce (Picea canadensis). 
Singleleaf pine (Pinus monophylla). 
Sitka, 
alder (Alnus sinuata). 
oa (Chamaecyparis nootkaten- 
Sis). 
MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 
Sitka—Continued. 
spruce (Picea sitchensis). 
willow (Saliz sitchensis). 
Skunk, 
bush (Rhus trilobaia). 
currant (Ribes bracteosum, 
Rites glandulosum, 
Rites prostratum). 
spruce (Picea canadensis). 
Slash pine (Pinus caribaea, 
Pinus palustris). 
Slender, 
buckwheatbrush (Hriogonum micro- 
thecum). 
poreleaf (Porophyllum gracile). 
willow (Salia exrigua). 
Slick oak (Quercus velutina). 
Slickbark oak (Quercus velutina). 
Slippery elm, (Ulmus fulva). 
California (Fremontia californica). 
loe (Prunus umbellaia, 
Viburnum prunifotium). 
Sinall, 
chestnut oak (Quercus prinoides). 
cranberry (Vaccinium oxycoccus). 
pignut hickory (Carya microcarpa, 
Carya ovalis). 
post oak (Quercus margaretta). 
sagebrush (Artemisia nova). 
serviceberry (Amelanchier humilis). 
viburnum (Viburnum obovatum). 
Small’s hackberry (Celtis smallii). 
Small-flowered, 
mountain-mahogany (Cercocarpus 
minutifiorus). 
papaw (Asimina parvifiora). 
Small-fruited, 
hickory (Carya microcarpa). 
papaw (Asimina parviflora). 
Smail-leaf, 
mahogany (Cercocarpus iniricatus). 
mockorange (Philadelphus micro- 
phyllus). 
Small-leaved horsebean (Parkinsonia 
microphylla). 
Smilax (Smilaxvz lanceolata). 
Smith buckthorn (Rhannus smithii)- 
Smoketree (Cotinus americanus, 
Parosela spinosa). 
Smooth, 
alder (Alnus rugosa). 
ash (Fragvinus velutina). 
azalea (Rhododendron arborescens). 
clematis (Clematis addisonii). 
cottonwood (Populus acuminata). 
cypress (Cupressus glabra). 
gooseberry (Rides oxyacanthoides, 
Ribes rotundifelium). 
hydrangea (Hydrangea arborescens). 
labrador tea (Ledum glandulosum). 
redbay (Persea borbenia). 
serviceberry (Amelanchier laevis). 
sumae (Rhus glabra). 
willow (Saliz laevigata). 
winterberry (Ilex laevigata). 
withe rod (Viburnum nudum). 
