Germination of Forest Trees 49 
conspicuously: Pinus ponderosa, Pinus jeffreyi, Pinus coulteri, 
and Libocedrus decurrens. This table shows that the Pacific 
coast species are predominantly moisture-loving. 
The foregoing table is a classification of all species used in the 
soil moisture experiments upon the basis of whether they ger- 
minated in all three soil moisture cultures, in two of them or in 
only one of them. These three groups are called by the terms 
xerophilous, xero-mesophilous, and mesophilous. Xerophilous 
species are those that germinated in all three cultures; xero- 
mesophilous species are those that germinated in the medium wet 
and the wet soil cultures; and mesophilous species are those that 
germinated only in the wet soil culture. 
TABLE VII 
Tue Errect oF Soil Texture on GERMINATION 
Eastern Species 
Loam Sand Gravel » 
Species suoldel/25/]sa/da/28 | galda| 38 
BA) PA Es) SA) eo le S| BA) ea |e 
EG LUSESTROUUS MAN Netra eee 22a SO | HO. 7) WS |) Bal || TwO} Bal | BS | GO 
Pi nUsKdivajiclla eae eee Ta es32esa5| Tee s8ulcz2-ol) xo) Ao) ases 
IFW POS CHAT UEC (Sse co bc eaeso0 5 TA 2Om ZOeG LOS.) 325\) LON ern | 280 
IPRS TPESCHOSE. ca deocoossbcducede 24 |.16 | 30.5] 20 | 54 | 85.0] 16 Sa RLOnS 
IPORUS POWISTOS > ok oo baknobeonacce Br || 58 | LOG) 20) Ga |.12.5]) a2 1 Ga || ong 
JED S HUGT De ess Pa eS eget WORE eee 34 6 | 9.0] 28 | 12 | 41.0] 4o iT |) ata) 
ANOES WOISCHIAs o35000600000000008 ie) || BO jp aeusO) wAL || 2yi | eS.5l) a6) || ZO |) Geo 
(COWHIDE SROGOSH..6 6560660558 0H00|) he x | RO! oO 0 | 0.0] oO 0 | 0.0 
Catalpa speciosa (Neb.)........... 16 | 12 |O1.0] 16 | 12 | 92.0] 16 ~ |) OO 
QUG?EUS FUL Bs s5 oss cacaondnocunds 40 | 28 | 28.0) 38 | 46 | 24.0] 30 | 54-| 16.0 
Robinia pseudacacia.............. 8 | 1 | 28) 8 | cB | BoO.S) SB | wS jl wi. 
ISCO. PUPMPUIGB ooo oo benbgouacce 34 I I.0) 34 m | BO} Bal | Os 
PNCOP COMO PON Boo 8 OE A AEP OD 18 | 30 | 17.0] 24 | 18 | 13.0] 18 8 8.0 
Gleditschia triacanthos............. © | ©} Oo) BA I 0) ©) Oo | 0.0 
Tables VII, VIII, and IX show the effect of soil texture upon 
the same species. 
Table VII shows that for the 12 species considered in the final 
results only one germinated first in the loam culture. Three 
germinated simultaneously in all cultures, three first in the sand, 
and four germinated first in the gravel. Three species had the 
longest germination period in loam, two in sand and 5 in gravel. 
