The following list contains the principal trees and plants found in these mountains; and for its completeness I am indebted to Capt. Berthoud, Chief Engineer of the Colorado Central Railroad.

Abronia fragrans.
Acer circinatum	Vine maple.
A. negundo	Box elder.
Achillea millefolium	Common yarrow, or milfoil.
Aconitum reclinatum	Monk’s-hood.
Actaea rubra	Red baneberry.
Aira pallens	Red-grass.
Allium triflorum	Onion, or leek.
Alnus incana	Speckled alder.
Amelanchier alnifolia	June berry.
Amphicarpaea monoica	Wild-hog peanut.
Anemone multifida	Many-cleft anemone.
A. Virginiana	Wind-flower.
Aquilegia cerulea	Blue columbine.
Arabis falcata	Rock-cress.
Arctostaphylos uva-ursi	Trailing arbutus.
Arenaria	Sandwort, several varieties.
Argemone Mexicana	Mexican poppy.
Arnica Montana	Arnica.
Artemisia canadensis	Wormwood, white sage.
Aster Novae-Angliae	Common New-England aster.
Astragalus caryocarpus	Milk-vetch.
A. filifolius.
A. hypoglottis.
A. mollissimus.
A. Plattensis.

Berberis aquifolium	Mahonia, blue barberry.
Betula glandulosa	Rocky-mountain birch.

Ceanothus ovalis	New-Jersey tea, or red root.
Cerastium arvense	Field chickweed.
Cheiranthus Cheiri	Wall-flower, yellow.
Chimaphilla maculata	Princes’-pine.
Clematis Viorna	Leather-flower.
C. Virginiana	Common virgin’s-bower.
Convolvulus arvensis	Bindweed.
Corallorhiza multiflora	Coral-root.
Corydalis aurea	Golden corydalis.
Cypripedium candidum	White lady’s-slipper.

Delphinium album	White larkspur.
D. menziessi	Larkspur.
Dodecatheon meadia	American cowslip.
Draba verna	Whitlow grass.

Echinospernum Lappula	Stick-seed.
Ellisia Nyctelea.
Epilobium spicatum	Willow-herb.
Erigeron compositum.
Erysimum cheiranthoides	Worm-seed mustard.
Euphorbia corollata	Flowering spurge.

Frasera Carolinensis	American columbo.

Gilia fragrans.
G. pulchella.
G. rosea.
Glyceria.

Ipomoea leptophylla.

Jamesia Americana	Mountain shrub.

Lilium Canadense	Wild yellow lily.
Linnaea borealis	Twin flower.
Linum Boottii	Yellow flax.
L. percum	Blue flax.
Lippia cuneafolia	Fog-fruit.
Lithospermum longiflorum.
Lupinus perennis	Wild lupine.

Malva moschata	Musk mallow.
Mentha borealis	Horsemint.
M. piperita	Peppermint.
M. viridis	Spearmint.
Mertensia	Lungwort.
Mimulus Jamesii	Monkey-flower.
Moneses unifiora	A very fragrant mountain flower.
Nasturtium palustre	Marsh-cress.
Nycterum lobatum	Yellow-weed.

Oenothera	In varieties.
Obione canescens.

Pentstemon ceruleum	Beard-tongue.
Phlox Drummondii	A showy annual of our gardens.
P. Subulata	Moss pink.
Polemonium ceruleum	Valerian.
Populus angulata	Bitter poplar.
P. grandidentata	Cottonwood.
P. tremuloides	American aspen.
Primula farinosa	Primrose.
P. rosea.

Ranunculus	Buttercup.
Rhus aromatica	Fragrant sumach.
R. typhina	Staghorn sumach.
Ribes aureum	Buffalo or Missouri currant.
Rubus Nutkanus	White flowering raspberry.

Sedum luteum	Stone moss.
Silene acaulis	Moss catchfly.
Sida coccinea	Red-flowering sida.
Spiraea opulifolia	Meadow-sweet.
Spiranthes cernua	Ladies’-tresses.

Thermopsis Montana	Yellow pea.
Tradescantia Virginica	Spiderwort.

Verbena Aubletia	Verbena.
V. bracteosa.
Viola cucullata	Violet—Heart’s-ease,
V. palmata.
V. pubescens.
V. rotundifolia.

Yucca angustifolia	Soap-weed, resembles our garden Yucca, Y. filententosa.

Note.—Many of the above plants will be recognised as favourites in Eastern gardens. There are many plants not as yet identified and named, as there has been no complete flora made of the United States West of the Mississippi. Tourists will observe how much more brilliant the blossoms of the same plant are up on the mountains than in the valleys. In the higher belts of vegetation, Nature has constructed her plants and trees to adapt them to their situation.

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