Sa 
in 
(Gxcrendia x. Cxdentata) oC Seeuintt vices BN heck ee ees. 1 
(C. crenata * C. dentata) XK (C. crenata X C. dentata).. 0.0.0.0... 61 
Os dent ata xe Ce MiOllaS SUN er Nor ee oe ons ds ee es Be le 
CRC CULALD a0 ee trate Ne Oya ela va OA 3 i a, ge eee a 13 
C. mollassima * C. crenata (U.S.D.A.)..0 ee 4 
CR INOUMUSSUNLEIXE: CLE EDLG attra the Fat ed 5. oy dl Re OR eee 10 
Cs mollissima var. Mammoth SEC entalas. :. o. Pan dole Se Nenene 12 
C. mollissi FOL ULI Yep Mere AE ce aca ie Saec Ree ae tal ON a a 4 
C ain SRC Grenade xen mC CntGt,) Ss ici wed oR ee 2 
C. mollissima X * Ee Ry nde Sn mR MT Rete OUND a3 Bio's 5 
Ginolissimar trom Close pollinavion |. 5% %.34. 3446402 ad aes 1 
(C. mollissima & C. pumila) X C. dentata o 0... 8 
eS OE OM ON EMOL Oe aes cc 8s a, SrlbrteGnurd dei th tte dt 13 
HS) OR CORSE TELL nce ioe fo hn ods he Sante Be then w Giese eee ene ep ile 
SO 1X, CO INOUUSSUNIG.« bo aso Gaia ea acne S-ay die Wb A 4 
eS) Meh (MICE CH OLGIOS C  CONLGEG) ince 03.4 Sb oe wh mines 1S 
Seedlings from ‘open pollinations”: Hamden (approximately).....100 
1FX0) (211 LNG mane eoe atan Ya OT NN | AR Se OR unk ated 755 
Respectfully submitted, 
ARTHUR H. GRAVES, 
Curator of Public Instruction. 
SYSTEMATIC BOTANY 
The Classification of Dicotyledons 
By ALFRED (GUNDERSEN 
Flower Structures —During 1937 studies and drawings of 
flower structures have been continued. Miss Purdy, staff artist, 
also completed a few detailed paintings. A photostat copy of the 
illustrations of Payer’s Organogenie compareé de la fleur, pub- 
lished in 1857, was made. “These valuable illustrations are now 
available in our library. Payer’s illustrations bring out what is 
not clearly brought out by his text, namely the change, during 
the development of the flower, from parietal to axile placenta- 
tion—in other words, a change from separate placentae to united 
placentae. 
It is now widely accepted that leaves, such as fern fronds and 
leaves of flowering plants, represent flattened and fused stems. 
Briefly, a clubmoss is a primitive fern. Likewise, it is now 
generally considered that from carpels-separate to carpels- 
—" 
