Great Basin: Nevada District. hysi 
Jouriana, P. flexilis, P. monophylla, Funiperus californica var. utahensis, Cerco- 
carpus ledifolius. 
niperus californica var. utahensis in places associated with Streptanthus cordatus, Pent- 
stemon puniceus, Phlox canescens, Berberis Fremontii, is the most common tree descending into 
valleys where at an elevation of 5,000 feet, it is often Bit but less so on mountain sides 
over which it spreads up to 8,000 feet elevation. — Growing with this juniper above 6,000 feet 
elevation and extending fh up the mountains is Pinus monophylla. Pinus Balfouriana occurs 
on Prospeet Mountain near Eureka at an elevation of 7,500 feet, while Pinus flexilis grows on 
Monitor Range from 8,000 feet up to 10,000 feet elevation, associated with Sana eh 
on the banks of the mountain streams. — Cercocarpus ledifolius is common at 6,000 to 
8,000 feet elevation and next to the juniper and Pinus monophylla is the most abundant of the 
trees of central Nevada. In the Washoe Mountains in common with the rest of the Sierras, 
there is a Be growth of several conifers of which Pinus ponderosa extends down to the 
very bas even on to ine valley slopes. Some of the high western canyons show a dense 
ge of Dich Engelman 
ar or ER vegetation of the omnipresent sagebrush Arte- 
ta mingled in the less alkaline and drier portions of the valleys with Atriplex 
OR ee: A. (O.) canescens, A, ae: Audibertia (Ramona) incana, Sphaerostigma 
tortuosa, Tricardia Watsoni, Ay comata, Juniperus californica var. utahensis, Pinus monophylla 
(the last seven SERIE, ng up to 6000 feet out of the Truckee Valley), Grayia spinosa (= G. poly- 
galoides), Artemisia spinescens, Eurotia lanata and Kochia prostrata, while Tetradymia canescens 
also occurs with the sage brush or with Artemisia trifida when that species replaces A. trident 
Purshia tridentata BEIOORRER with Ribes leptanthum; Prunus Andersoni is widely distributed — 
the base of the S 
The fo oe most important genera of plants are found between the shrubs: Astragalus, 
Oenothera, Gilia, Phacelia, Emmenanthe, Nama (Conanthus), Eriogonum, Oxytheca, a ne 
Tetradymia, Senecio, Seöhäno omeria, Glyptopleura, Lygodesmia, Malacothrix, Troximon 
For miles and miles the adobe plains in southwest Colorado are ee 
with Artemisia tridentata, with Sarcobatus vermiculatus, Bigelovia graveolens, 
Atriplex canescens common in scattered spots. Early in June the hills and 
mesas seem suddenly to burst into bloom, Peraphyllum ramosissimum is one 
of the earliest. Fendlera rupicola towers above every other shrub with white 
flowers. Amelanchier alnifolia is also in bloom at this season. Purshia tri- 
dentata and Cercocarpus parvifolius are common. Owercus undulata has put 
forth its early leaves. Phnladelphus microphyllus is found on rocky hill and 
abrupt canyon sides. 
The spring an herbs April 5th to June ıst as found in southern Utah, accor- 
ding to PARRY, consist at first of evanescent annuals, such as Phacelia Fremontü, re erassifolia, 
P. micrantha, P. rotundifolia, ee by Gilia inconspieua, G. leptomeria, G, demissa, G. Bige- 
lovii, G. floecosa, G. polyeladon, G. setosissima. Among other interesting dwarf koch ns characte- 
rizing the early spring flora may be noted: fee ke ge Malvastrum exile, Lupinus 
Sileri (=L. Kingii), Eriophyllum Wallacei, E. lanosum, Syntrichopappus Fremontii, Arc wer 
Fe en micropoides, Nemocladus ramosissimus, ae demissa and Pterostegi 
y bulbous plant, Androstepbium breviflorum grows on gravelly Bis. suotesdec ” 
u as capitata. Early in May, Calochortus flexuosus is conspicuous on hillsides. After 
the late,spring frosts, Oenothera albicaulis, Oe. Partyl, Dalea Johnsoni, Coleogyne ramosissima, 
Aster tortifolius, Audibertia incana, Lepidium Fremontii, Hymenoclea salsola, Franseria _— 
1) EAstwoop, A.: The common Shrubs of southwest Colorado, Zoe. II: a 
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