-IIKASSIC VUmX OF norOLAS COUNTY. OHE(;. 125 



leaf ill which oiu^ side is ciitii-e, alTording an idea of the witlth of tlie leaf. 

 The summit of tliis is not preserved. 



This plant is nnich the most common (!ink<io at locality Xo. 2. 

 where it is almndant. It is also found at local'ties Xos. 4, 7, and 11). 



(ilNKCO UaailA IllMT. 



]'l. XXXI 1, Fifis. ;v,s. 



1s7('). <;hiLi/ii li jiiild Ilccr: Fl. Fuss. Arct..\'i)l. IW I't. II (.lura-Fl. ( )stsil)iricns), 



|). ()2, p. vii, IJi;. 7; pi. xii. 

 iss,"). Siilishuriii ((finl-oi>) h pida (Ilccr) I)n.; Tiaiis. Roy. Soc. CiiUiula, Sect. I\', 



\i>\. Ill, |>. N, |il. ii, li^. ■-*. 



The Icjiidit \y\>c of (iinkfjo, as <iiven hy lleer, is represented in the 

 Oregon flora 1)\- a considerable number of specimens. The leaf substance 

 is tliick and leather-like. The jii'imaiy segments are cut down to the 

 base of the l(>aves, where they are rcducetl almost to petioles. The 

 secondary segments are long and narrowly elliptical to linear in form, 

 widest near the middle and tapering toward their lower and upper por- 

 tions. This form sometimes tends to pass into the sibirica type by 

 intermediate shapes that are rather common. The lepida type departs 

 fui'ther than any other from that of G. dif/itnta. 



PI. XXXII, Fig. 3, gives a nearly entire leaf and one of the largest 

 found. It shows the long narrow segments well. This is shown enlarged 

 in Fig. 4. Fig. 5 shows a primary .segment with several ultimate ones, 

 the Ijasal i)ai't not l)eing preserved. Fig. 6 denotes a primary segment 

 with the ba.se not preserved, having shorter and proportionally broader 

 ultimate .segments than is common. Fig. 7 shows this much enlarged. 

 Fig. S gives a portion of a primary segment with three ultimate ones of 

 the smallest size. Owing to the deep incisions of the leaf and its spreading 

 habit, it is rare to find entire leaves of this type. 



This plant is most connnon at locality X"o. 19, where it is rathei' 



abundant. It is also common at locality X'o. 7. It occurs more rarely 



at locality Xo. 4. 



GiNK(;() snuHKA I leer. 



PI. XXXI 1 1. 



1876. Ginkgo HiUrica Heer: FI. Fo.ss. Aret., \'()i. IV, I't. II (.lura-Fl. Ostsibiriens) 

 pp. 01, 116, pi. vii, fie;. 6; pi. ix, fit;, ."ih: pi, xi (excl. \v^. 'M))\ \A. xx, fig.s. :\h. 

 6e; pi. xxii, fig. 3. 



1885. SaJinhnria {(rinl-ffo) sihirira (Heer) Dn.: Truus, Koy. Soc. Canada, Sect. I\ , 

 \»\. Ill, ]). s, ])!, ii. fijr. 1. 



