650 METASPERMAE OF THE MINNESOTA VALLEY. 
C. Table Illustrating Continental Development of Genera 
Represented in the Minnesota Valley.— Continued. 
NORTHERN. SOOTHERN. EASTERN. WESTERN. 
Comp|ositae. 
tenn eee ee eeon ne eeeeseenes Vernonia............]| Vernonia............ 
Sine selsment ties memeiednee’ Eupatorium. | HWPSLOFIUM, «sex . 
sir de Gel Nad netidemneperemeees Kuhnia ..... 
ere .| Laciniaria.. 
Erigeron. : staistoiete’s Bis seateeansll atone g . 
Antennar .| Antennaria 
Anaphali eesti e Anaphalis ...| Avaphalis,..... 
Gnaphalium,. eyed bia lbiaebiatginlava-aid Sayansdinnslastbeayaiiysl| a cnarntnuee,ssaclets Gnaphalium ... s 
Adenocaulon i a liste sete er’ > sigeee cies aR Aided: caw ote «. «..| Adenocaulon... 
balay cba ee cites Poly mini a asiace, vw sare |esesiac sewers eniees x 
aha aiptetee ia saree Biante wiste iets Silphium.... Silphium eves se acess | assameaeraaind. 6 a 
Setnasg. geaednsiraiudeatesters oataeis Parthenium.... Parthenium.. c 
Ruunead a Se ene aaeind sae EN Oyclachaena.. Cyclachaena. 
4 det Brlle avian» v araieibnarasor Ambrosia.... Ambrosia..... 
MaNthiv Mesa; wecerarsee view weirs eee Xanthium,.. . 
darasse a Sameman eis 25 ERT Heliopsis.. Heliopsis..... 
KedoW sang a hearaeeeh Menace Rudbeckia .. .| Rudbeckia oe = 
Eas A seaesees| Helianthus.. Helianthus........ .|. = 
Baton deins Hasse aysiesndrciniameersis Coreopsis... COLEODSIS:: 5 sssiesiecice se: |3 : 
is biardia diaveinnw ovbisle si amiaiaisielecnete Bidens..... .| Bidens........ : 
cai js) PLOLS MIU Mi 65) ta denies [iaissdiore senicihavstateneaisielesaigies Helenium 
nea Gaillardia Gaillardia 
sale Dyssodia .| Dyssodia 
ACH CA: sa:cicseaeaiia aarea| ses 8 cdiares-os wie 4 Achillea 
fe ecibgee Erechthites..........] Erechthites .........J....2. 0005 
Artem a am? letaualegiak ivan ariaes | else's 8 Artemisia, 
ds ls 40 ..| Senecio... .. au eaearares .| Senecio. 
GuICUS cecasexess — avesesl avs oF exesns see slesaweorensaans SoGc .. | Onicus.... 
actu cg. vs Sasigeegieas| see wacseaitarsdees : seagate eeedeeaes Meme 
sgweece way saavenee| DARaXacum. .: Taraxacum : 
cloa sie ea? . acawent asisausan: Nothocealais.... Nothocalais = 
Reece _Agoseris..... Agoseris.... 
wilecerescutinmraasohecsla tae anions Adopogon............| AMOPOZOD ....... 60. fesee ees eeeee ioe e 
Waa ae Sik -.e.e.| Lygodesmi Lygodesmia.. 7 
hikes wana sReRMCGETE Prenanthes..........] Prenanthes,, .......| 2. sseseeesceees 
OLre DIS. icsisssaccecses ac ste ee adisintee via ware vee als eiaedse ||| CREDIS. saz x 
FSA CHUM biseisnr sara seerepif sic ate Six tranaccearchu recon teecic!| ar aa diode delnjeldnaialenmaligcientas Hieracium..... ....- 
From the preceding table,statistics may be compiled as from 
the table of general generic range. Four range-elements may 
be discovered in the genera of the Minnesota valley and the 
mutual relations of these range-elements to the taxonomic 
groups may be determined, as before, by percentages. The 
four range-elements are as follows: 
A. The Northern generic element. 
B. The Southern generic element. 
C. The Eastern generic element. 
D. The Western generic element. 
Each of these may be examined in turn 
