36 MISSOURI BOTANICAL GARDEN BULLETIN 
readily reproduce themselves from seed. A very few low, 
rock-loving shrubs have also been included. 
Many of these plants may be obtained from American nur- 
serymen and collectors, and those not at present offered by the 
trade will no doubt be available as soon as their value has 
been demonstrated. 
Until then they must be collected from 
their natural haunts, which in itself is a worth-while reerea- 
tion for the maker of a rock garden. 
NATIVE PLANTS SUITABLE FOR THE GARDENS OF MISSOURI 
AND ADJOINING STATES. 
a Approx. 
‘ Approx.| Color of ; 
Botanical name Common name ; 1 time of 
height flowers bloom 
3-8 *Agave virginica|Faise aloe 2-6’ Greenish May-June 
vellow 
8 Allium stellatum|Prairie wild onion 8-18” |Rose July-Aug. 
8 Arabis confinis Purple rock-cress 1-3’ White or |June-July 
pink 
8 Arabis Virginia rock-cress 1-3’ White March-May 
Ludoviciana 
8 Arabis lyrata Lyre-leaved rock- 4-12” |Pure white |April-Sept. 
cress 
8 Arabis patens Spreading rock-cress | 1-2’ |White Summer 
8 Arabis perfoliata |Tower mustard Yellowish- |May-Aug. 
(biennial) white 
8 Arenaria stricta |Rock sandwort 6-16” |White June-July 
(tufted) 
8 Asplenium Spleenwort 8-15” |Fern 
ebeneum 
8 Asplenium Maidenhair 3-8” |Fern 
Trichomanes spleenwort 
9 Aster Savory-leaved aster | 6-12” | Violet July-Oct, 
linariifolius (low, tufted) 
8 Aster Aromatic aster 1-214’ | Violet- Aug.-Oct. 
oblongifolius purple 
8 Astragalus Bent milk-vetch 8-15” |\Purple March-July 
distortus 
9 Baptisia Large-bracted wild 1-114’ |Cream April-May 
bracteata indigo 
& Ceanothus ovatus|Smaller red-root 1-2’ White May-June 
(shrub) 
8 Cheilanthes Woolly lip-fern 6-18” |Fern 
lanuginosa 
3 Delphinium Dwarf larkspur he Blue or May 
tricorne white 
*Key to soil conditions: 
1. Clay. 
2. Clay subsoil. 
3. Clay loam. 
4, Loam. 
5. Leafmold. 
6. Gravelly soil. 
7. Sandy loam. 
8. Disintegrated limestone. 
9. Disintegrated flint. 
Two or more numbers indicate a combination of soil conditions: 
for example, 2-4 is loam with a clay subsoil. 
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